Published October 11, 2025 by Michael Le Pard , Editor‑in‑Chief
Total Motorcycle Bikers Dictionary
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Parallel Twin – 1. An inline 2 cylinder engine. 2. A two cylinder engine with its cylinders placed side by side in an upright position.
| P.O. (Previous Owner) — Acronym for a bike’s former owner. | ||
| P.O.B.O.B. — “Pissed Off Bastards of Bloomington,” precursor to Hells Angels MC. | ||
| Pack — Group of riders traveling together. | ||
| Pack Formation — Riding formation used by motorcycle groups. | ||
| Pack Leader — Rider leading a group ride. | ||
| Pack Mentality — Group behavior among riders, especially in clubs. | ||
| Pack Riding — Riding in a group, often with formation rules. | ||
| Pack Spread — Distance between riders in a group. | ||
| Pack Tank — Slang for a hydration pack worn by riders. | ||
| Paddock — Area at a racetrack where motorcycles are serviced and staged. | ||
| Paddock Stand — Detachable stand used to lift the front or rear wheel. | ||
| Pads — Slang for brake pads or tires, depending on context. | ||
| Paint Job — Custom or factory paint scheme on a motorcycle. | ||
| Paint Protection Film — Clear film applied to protect paintwork. | ||
| Painted Frame — Motorcycle frame finished with paint rather than chrome or powder coat. | ||
| Painted Tank — Custom painted fuel tank. | ||
| Paintwork — General term for a motorcycle’s painted surfaces. | ||
| Pair Delete Kit — Kit used to remove the PAIR emissions system. | ||
| Pair System — Secondary air injection system for emissions control. | ||
| Pair Valve — Emissions system injecting air into exhaust ports. | ||
| Palm Grip — Handlebar grip designed for palm comfort. | ||
| Palm Rest — Accessory allowing wrist relief on long rides. | ||
| Pan Cover — Cover for Harley‑Davidson Panhead engines. | ||
| Pan Gasket — Oil pan gasket. | ||
| Pan Oil Leak — Common issue with older Panhead engines. | ||
| Pan Shovel — Hybrid Harley engine with Panhead lower and Shovelhead top. | ||
| Pan Springer — Custom Panhead with springer front end. | ||
| Pan Style Chopper — Custom chopper built around a Panhead engine. | ||
| Pancake Engine — Horizontally opposed engine (e.g., BMW Boxer, Honda Gold Wing). | ||
| Panel Light — Dashboard or instrument light. | ||
| Panel Switch — Switch mounted on a control panel. | ||
| Panel Tank — Fuel tank with decorative side panels. | ||
| Panel Trim — Decorative trim on side panels. | ||
| Panhead — Harley‑Davidson Big Twin engine (1948–1965), named for its pan‑shaped rocker covers. | ||
| Pannier — Saddlebag or side case mounted over the rear wheel. | ||
| Panorama Ride — Scenic ride emphasizing wide views. | ||
| Panther Motorcycle — Classic British motorcycle brand (Phelon & Moore). | ||
| Panther Sidecar — Sidecar rig built with Panther motorcycles. | ||
| Panther Twin — Twin‑cylinder motorcycle by Panther. | ||
| Paper Air Filter — Disposable air filter element. | ||
| Paper Gasket — Gasket made of compressed paper material. | ||
| Paper Manual — Printed motorcycle service manual. | ||
| Paper Plate — Temporary registration plate. | ||
| Parade Lap — Slow lap before a race, often ceremonial. | ||
| Parade Ride — Group ride through town, often for charity or awareness. | ||
| Parallel Porting — Cylinder head porting where intake and exhaust are parallel. | ||
| Parallel Twin — Inline two‑cylinder engine with side‑by‑side cylinders. | ||
| Parked It — Slang for going slower in a race than conditions allow. | ||
| Parking Brake — Brake designed to hold a motorcycle stationary when parked. | ||
| Parking Lot Practice (PLP) — Rider training drills performed in a parking lot. | ||
| Parking Stand — Another term for kickstand or center stand. | ||
| Participate — Club slang: to aid a member in a fight by joining in. | ||
| Parts Bike — Motorcycle kept for spare parts. | ||
| Parts Bin Special — Motorcycle assembled from leftover or mixed parts. | ||
| Parts Catalog — Manufacturer’s listing of all parts for a model. | ||
| Parts Counter — Dealership counter where parts are sold. | ||
| Parts Manual — Book listing part numbers and diagrams. | ||
| Parts Per Million (PPM) — Measurement of concentration, often for emissions. | ||
| Parts Washer — Machine for cleaning greasy motorcycle parts. | ||
| Pass — Overtaking another rider or vehicle. | ||
| Pass Bag — Small bag for carrying toll or entry passes. | ||
| Pass Light — Headlight flash used to signal overtaking. | ||
| Passenger — Person riding pillion on a motorcycle. | ||
| Passenger Backrest (Sissy Bar) — Support bar behind the passenger seat. | ||
| Passenger Floorboards — Flat footrests for passengers. | ||
| Passenger Grab Rail — Handle for passenger stability. | ||
| Passenger Pad — Small pillion seat for a passenger. | ||
| Passenger Pegs — Footpegs for the passenger. | ||
| Passenger Seat — Seat designed for a pillion rider. | ||
| Pasta Rocket — Slang for Italian sportbikes (Ducati, Aprilia, MV Agusta, Benelli). | ||
| Patch — Sewn insignia representing club or affiliation. | ||
| Patch Holder — Full member of a motorcycle club. | ||
| Patch Over — When a rider changes clubs and adopts new colors. | ||
| Patch Set — Full set of club patches (top rocker, bottom rocker, center). | ||
| Patched In — Term for being accepted as a full motorcycle club member. | ||
| Patches — Sewn‑on insignia representing club, brand, or achievements. | ||
| Patina — Natural wear and aging on a motorcycle’s finish, often valued for character. | ||
| Pattern Part — Aftermarket part made to match OEM design. | ||
| Pavement Ends — Road sign indicating transition from paved to dirt/gravel. | ||
| Pavement Pounder — Slang for a heavy cruiser designed for highway use. | ||
| Pavement Princess — Slang for a show bike rarely ridden. | ||
| Pavement Surfing (PS) — Being thrown from a bike and skidding along the road. | ||
| Payback Ride — Club ride organized to settle a score or show strength. | ||
| Paying Dues — Club term for proving loyalty through tasks or time. | ||
| PCV (Positive Crankcase Ventilation) — System venting crankcase vapors into intake to reduce emissions. | ||
| Peak Horsepower — Maximum horsepower output of an engine. | ||
| Peak Torque — Maximum torque output of an engine. | ||
| Peanut Tank — Small, rounded Harley‑Davidson Sportster fuel tank. | ||
| Pearl Paint — Paint with pearlescent finish. | ||
| Pearl Tank — Fuel tank finished with pearlescent paint. | ||
| Ped Boi — UK slang for a chav/hoodie riding a moped, often in groups. | ||
| Pedal Start — Early mopeds started by pedaling before engine engagement. | ||
| Pedal Start — Early mopeds started by pedaling. | ||
| Peg Dragging — Leaning so far in a corner that footpegs scrape the pavement. | ||
| Peg Dragging — Leaning so far that footpegs scrape the pavement. | ||
| Peg Mount — Bracket or fixture securing a footpeg to the frame. | ||
| Peg Rubber — Rubber covering on a footpeg for grip and comfort. | ||
| Peg Scraper — Rider known for consistently scraping pegs in corners. | ||
| Pegging — One rider pushes another’s disabled bike using their foot on the rear peg. | ||
| Pelican Case — Rugged, waterproof luggage case often mounted as panniers. | ||
| Pendulum Effect — Instability caused by heavy loads mounted high or rearward. | ||
| Penetrating Oil — Lubricant used to loosen rusted or seized bolts. | ||
| Performance Cam — Camshaft designed to increase engine performance. | ||
| Performance Exhaust — Aftermarket exhaust designed for power gains. | ||
| Performance Filter — High‑flow air filter for improved airflow. | ||
| Performance Tuner — Device for adjusting fuel/ignition maps. | ||
| Performance Upgrade — General term for aftermarket performance modifications. | ||
| Perimeter Frame — Frame design with twin spars running around the engine. | ||
| Permanent Magnet Alternator — Alternator using permanent magnets to generate current. | ||
| Personal Plate — Custom or vanity motorcycle license plate. | ||
| Petcock — Fuel valve with ON, OFF, RESERVE, and PRIME positions. | ||
| Petrol Tank — British term for fuel tank. | ||
| Petrol Tap — British term for petcock (fuel valve). | ||
| PEV (Personal Electric Vehicle) — Electric motorcycle or scooter for short‑distance travel. | ||
| Phantom Bike — Motorcycle model rumored but never produced. | ||
| Phantom Rider — Slang for a ghost rider or unknown biker. | ||
| Phantom Vibration — Sensation of vibration when none exists. | ||
| PhD (Harley‑Davidson) — Training program for dealership technicians. | ||
| Photocell Headlight — Headlight that adjusts automatically to ambient light. | ||
| Photochromic Visor — Helmet visor that darkens automatically in sunlight. | ||
| Photographer Bike — Motorcycle used by event or trackside photographers. | ||
| Physics of Lean — Principle that motorcycles must lean to corner. | ||
| Pickle Forks — Slang for extended front forks on a chopper. | ||
| Pickled Bike — Motorcycle stored long‑term with fuel drained and fluids treated. | ||
| Pick‑Up Coil — Ignition component that triggers spark timing. | ||
| Pick‑Up Truck Bike Hauler — Motorcycle carried in the bed of a pickup truck. | ||
| Picture Window Fairing — Large touring fairing with wide windshield. | ||
| Pie‑Cut Exhaust — Custom exhaust made from pie‑cut tubing sections. | ||
| Pig Iron — Slang for heavy Harley‑Davidson motorcycles. | ||
| Pig Pen — Slang for a messy garage or club hangout. | ||
| Pig Tail — Electrical connector extension or battery charging lead. | ||
| Pig Trail — Famous motorcycle road in Arkansas, USA. | ||
| Piggyback Shock — Rear shock absorber with an external reservoir. | ||
| Pillion — Passenger riding on the back seat. | ||
| Pilot Circuit — Carburetor circuit controlling idle and low‑speed fueling. | ||
| Pilot Jet — Carburetor jet controlling fuel at idle and low throttle. | ||
| Pilot Light — Small indicator light on a motorcycle dashboard. | ||
| Pilot Screw — Carburetor screw adjusting idle mixture. | ||
| Pin It — Slang for opening the throttle wide. | ||
| Pin Lock Visor — Helmet visor with anti‑fog insert system. | ||
| Pin Striping — Decorative painted lines on motorcycles. | ||
| Pinch Bolt — Bolt that clamps a component in place (e.g., axle pinch bolt). | ||
| Pinion Gear — Small gear driving a larger gear, often in starters. | ||
| Pinion Shaft — Shaft carrying the pinion gear. | ||
| Pinlock Insert — Anti‑fog insert for helmet visors. | ||
| Pipe Baffle — Insert used to reduce exhaust noise. | ||
| Pipe Burn — Burn injury from touching a hot exhaust pipe. | ||
| Pipe Wrap — Heat‑resistant wrap applied to exhaust pipes. | ||
| Pipes — Exhaust system. | ||
| Pipes (Exhaust) — General slang for a motorcycle’s exhaust system. | ||
| Pisspot Helmet — Old‑style open‑face helmet, often vintage British. | ||
| Piston — Cylindrical engine component moving within a cylinder. | ||
| Piston Crown — Top surface of a piston. | ||
| Piston Pin — Pin connecting piston to connecting rod. | ||
| Piston Rings — Sealing rings around a piston. | ||
| Piston Seizure — Engine failure caused by piston overheating and sticking. | ||
| Pit — Designated area at a racetrack for maintenance and team garages. | ||
| Pit Board — Sign shown to riders with lap times, position, or instructions. | ||
| Pit Board Signal — Information displayed to a racer from the pit wall. | ||
| Pit Crew — Mechanics and assistants supporting a racer. | ||
| Pit Entry — Designated lane for entering the pits at a racetrack. | ||
| Pit Exit — Designated exit lane from the pits back to the track. | ||
| Pit Lane — Lane adjacent to the track for entering/exiting and servicing bikes. | ||
| Pit Lane Speed Limit — Maximum speed allowed in pit lane. | ||
| Pit Marshal — Official overseeing pit lane activity. | ||
| Pit Pass — Credential allowing access to pit area. | ||
| Pit Signal — Communication from pit crew to rider. | ||
| Pit Stop — Brief stop during a race for refueling, tires, or adjustments. | ||
| Pit Stop Strategy — Planned timing of pit stops in racing. | ||
| Pitch Circle — Diameter of a sprocket’s bolt circle. | ||
| Pitch of Chain — Distance between chain link pins. | ||
| Pivot Bolt — Bolt acting as a pivot point (e.g., swingarm pivot). | ||
| Pivot Point — Central point around which a part rotates. | ||
| Pivot Shaft — Shaft acting as a pivot. | ||
| Pivot Tube — Tube housing a pivot shaft. | ||
| Pivoting Caliper — Brake caliper that pivots for even pad wear. | ||
| Pivoting Pegs — Footpegs that pivot for comfort or clearance. | ||
| Pivoting Stand — Stand that pivots to lift the motorcycle. | ||
| Plank Seat — Thin, flat seat with little padding. | ||
| Plastic Biker — Slang for a new rider who buys everything brand new. | ||
| Plastic Fantastic — Slang for sportbikes with extensive plastic fairings. | ||
| Plastic Maggot — Slang for Honda CX500 (UK) or Honda PC800 (NA). | ||
| Plastic Tank — Fuel tank made of plastic or composite. | ||
| Plastic Weld — Repair method for plastic parts. | ||
| Plate Bracket — Bracket holding a license plate. | ||
| Plate Frame — Frame surrounding a license plate. | ||
| Plate Light — Light illuminating a license plate. | ||
| Plate Mount — Mounting point for a license plate. | ||
| Plate Number — Registration number on a license plate. | ||
| Plate Relocator — Aftermarket kit to move license plate position. | ||
| Plate Screw — Screw securing a license plate. | ||
| Plate Tab — Tab for attaching a license plate. | ||
| Plate Tube — Tube frame section supporting a plate mount. | ||
| Plate Weld — Weld securing a plate or bracket. | ||
| Platform Pegs — Wide footpegs providing more support. | ||
| Play the Clutch — Using a partially engaged clutch for control. | ||
| PLP (Parking Lot Practice) — Rider training drills in a parking lot. | ||
| Plug (Spark Plug) — Ignition component producing spark in a cylinder. | ||
| Plug Cap — Connector attaching the ignition lead to the spark plug. | ||
| Plug Chop — Tuning method: reading spark plug color after a throttle run. | ||
| Plug Gap — Distance between spark plug electrodes, critical for ignition. | ||
| Plug Wrench — Tool for removing and installing spark plugs. | ||
| Plugs Too Cold — Spark plug that fouls due to insufficient heat. | ||
| Plugs Too Hot — Spark plug that causes pre‑ignition due to excessive heat. | ||
| Plunger Frame — Early rear suspension design using plungers instead of swingarms. | ||
| Plunger Seat — Seat mounted on springs or plungers for comfort. | ||
| Plunger Suspension — Rear suspension with vertical plungers, pre‑swingarm era. | ||
| PMS (Parked Motorcycle Syndrome) — Rider frustration when unable to ride. | ||
| Pocket Bike — Miniature motorcycle, often used for fun or racing. | ||
| Pocket Rocket — Slang for small, high‑performance sportbike. | ||
| Pod Filter — Individual cone‑style air filter replacing stock airbox. | ||
| Point Gap — Distance between ignition contact points. | ||
| Point Ignition — Mechanical ignition system using contact breaker points. | ||
| Point Plate — Plate holding ignition points in place. | ||
| Point Screw — Screw adjusting ignition points. | ||
| Pointless Ignition — Electronic ignition system without contact points. | ||
| Points — Contact breaker points in older ignition systems. | ||
| Points Cover — Cover protecting ignition points. | ||
| Points Ignition — Traditional ignition using mechanical points. | ||
| Points Plate — Plate carrying ignition points. | ||
| Points Timing — Adjustment of ignition timing via points. | ||
| Poker Run — Group ride with stops to collect playing cards; best hand wins. | ||
| Police Bike — Motorcycle outfitted for law enforcement use. | ||
| Police Fairing — Fairing fitted to police motorcycles. | ||
| Police Lights — Emergency lights fitted to police motorcycles. | ||
| Police Radio — Communication system on police motorcycles. | ||
| Police Siren — Siren fitted to police motorcycles. | ||
| Polish Chrome — Cleaning and shining chrome parts. | ||
| Polished Aluminum — Aluminum parts buffed to a mirror finish. | ||
| Polished Cases — Engine cases polished for appearance. | ||
| Polished Frame — Frame polished for custom look. | ||
| Polished Rims — Wheel rims polished for shine. | ||
| Polycarbonate Shield — Helmet visor made of impact‑resistant polycarbonate. | ||
| Polyurethane Bushing — Suspension bushing made of polyurethane. | ||
| Pony Express Run — Charity ride inspired by the Pony Express. | ||
| Pony Tank — Small auxiliary fuel tank. | ||
| Pony Trail — Slang for a short, easy ride. | ||
| Pop Rivet — Fastener used in motorcycle bodywork. | ||
| Popping Exhaust — Backfiring or popping sound from exhaust. | ||
| Popping the Clutch — Releasing the clutch suddenly for a fast start. | ||
| Pop‑Up Gas Cap — Flush‑mount fuel cap that pops up when pressed. | ||
| Pork Chop — Slang for a Harley engine crankcase half. | ||
| Port — Opening into a cylinder for intake or exhaust. | ||
| Port Fuel Injection — Fuel injected directly into intake ports. | ||
| Port Matching — Aligning intake/exhaust ports with manifolds. | ||
| Port Polishing — Smoothing intake/exhaust ports for airflow. | ||
| Port Timing — Timing of port openings in two‑stroke engines. | ||
| Ported Cylinder Head — Cylinder head modified for better airflow. | ||
| Porting — Modifying intake/exhaust ports for better airflow. | ||
| Poser — Slang for a wannabe biker with flashy gear but little authenticity. | ||
| Positive Camber Turn — Banked turn where the outside is higher than the inside. | ||
| Positive Crankcase Ventilation (PCV) — System venting crankcase vapors. | ||
| Positive Ground — Electrical system with positive terminal grounded. | ||
| Positive Stop Shifter — Shifter mechanism preventing missed gears. | ||
| Postie Bike — Honda step‑through used by postal services in Australia/New Zealand. | ||
| Post‑Ride Check — Inspection after a ride for maintenance issues. | ||
| Post‑War Bike — Motorcycle built after World War II. | ||
| Post‑War Harley — Harley‑Davidson models built after WWII. | ||
| Post‑War Triumph — Triumph models built after WWII. | ||
| Post‑War Vintage — General term for motorcycles built post‑1945. | ||
| Pot (Carburetor) — Slang for a single carburetor barrel. | ||
| Pot Metal — Cheap alloy used in some motorcycle parts. | ||
| Potentiometer — Variable resistor used in sensors. | ||
| Pots (Brake Caliper Pistons) — Pistons in a brake caliper pressing pads against the disc. | ||
| Pounder — Slang for a heavy motorcycle. | ||
| Pound‑Foot (lb‑ft) — Unit of torque measurement. | ||
| Pour on the Coals — Slang for accelerating hard. | ||
| Powder Coat — Durable paint finish applied electrostatically. | ||
| Powder Coated Frame — Frame finished with powder coating. | ||
| Powder Coated Rims — Rims finished with powder coating. | ||
| Powder Coated Tank — Fuel tank finished with powder coating. | ||
| Powder Coated Wheels — Wheels finished with powder coating. | ||
| Powder Coating — Process of applying powder paint finish. | ||
| Power — Measurement of engine work over time, expressed in hp, bhp, or kW. | ||
| Power Commander — Aftermarket fuel injection tuning module. | ||
| Power Cruiser — High‑performance cruiser motorcycle with sportbike‑level power. | ||
| Power Curve — Graph showing horsepower/torque vs. RPM. | ||
| Power Delivery — How an engine delivers torque across RPM. | ||
| Power Plant — Slang for motorcycle engine. | ||
| Power Rating — Official horsepower or torque rating. | ||
| Power Shift — Gear change performed without using the clutch. | ||
| Power Shifting — Changing gears without clutch, under throttle. | ||
| Power Slide — Controlled rear‑wheel slide under throttle when exiting a corner. | ||
| Power Steering (Rare) — Steering assist on some heavy motorcycles. | ||
| Power Stroke — Combustion stroke in a four‑stroke engine. | ||
| Power Tuner — Device for adjusting ECU maps. | ||
| Power Valve — Exhaust valve system (common on two‑strokes) that adjusts port timing for broader powerband. | ||
| Power Wheelie — Front wheel lift caused purely by throttle, not clutch. | ||
| Powerband — RPM range where an engine produces its strongest output. | ||
| Power‑to‑Weight Ratio — Performance measure: horsepower divided by motorcycle weight. | ||
| Powertrain — Combined engine and transmission system of a motorcycle. | ||
| P‑Pad (Pillion Pad) — Small passenger seat attached to the rear fender. | ||
| Practice Bike — Motorcycle used primarily for training or track practice. | ||
| Practice Lap — Non‑competitive lap to learn track layout or conditions. | ||
| Practice Run — Informal ride or test before competition. | ||
| Practice Session — Non‑competitive track time for testing setups and rider training. | ||
| Pre‑Ignition — Fuel mixture igniting before the spark plug fires, causing engine knock. | ||
| Preload — Initial compression applied to suspension springs. | ||
| Preload Adjuster — Device for changing suspension preload. | ||
| Preload Spacer — Insert used to adjust spring preload in forks. | ||
| Pre‑Mix — Two‑stroke fuel mixture of gasoline and oil. | ||
| Pre‑Mix — Two‑stroke fuel/oil mixture. | ||
| Pressure Bleeder — Tool for bleeding hydraulic brake or clutch systems. | ||
| Pressure Gauge — Instrument for measuring tire or oil pressure. | ||
| Pressure Plate — Clutch component pressing friction plates together. | ||
| Pressure Relief Valve — Valve preventing excess oil pressure. | ||
| Pre‑Unit Construction — Older motorcycle design with separate engine and gearbox casings. | ||
| Pre‑Unit Triumph — Classic Triumph motorcycles built before 1963 with separate engine and gearbox. | ||
| Pre‑Unit Triumph — Classic Triumph motorcycles built before unitized engine/gearbox (pre‑1963). | ||
| Primary Belt Drive — Belt replacing chain in primary. | ||
| Primary Case — Housing for the primary drive system. | ||
| Primary Chain — Chain connecting crankshaft to clutch in some motorcycles. | ||
| Primary Chaincase — Enclosure containing the primary chain and clutch. | ||
| Primary Cover — Outer casing covering the primary drive. | ||
| Primary Drive — System transmitting power from crankshaft to transmission. | ||
| Primary Gears — Gear set connecting crankshaft to clutch basket. | ||
| Primary Oil — Lubricant used in the primary drive case. | ||
| Primary Ratio — Gear ratio between crankshaft and clutch. | ||
| Primary Tensioner — Device maintaining chain tension. | ||
| Prime Position — Fuel tap setting allowing free flow. | ||
| Prime Position (Fuel Tap) — Setting on petcock allowing free fuel flow. | ||
| Private Road Ride — Ride held on closed or private roads. | ||
| Privateer — Independent racer without factory sponsorship. | ||
| Pro Arm — Honda’s single‑sided swingarm design. | ||
| Pro Circuit — Professional racing series or aftermarket performance brand. | ||
| Pro Drag Bike — Motorcycle built for professional drag racing. | ||
| Pro Link — Honda suspension linkage. | ||
| Pro Link — Honda’s rising‑rate rear suspension linkage. | ||
| Pro Modified Bike — Custom drag racing class motorcycle. | ||
| Pro Rider — Professional motorcycle racer. | ||
| Pro Stock Bike — NHRA drag racing class for motorcycles. | ||
| Pro Stock Motorcycle — NHRA drag racing class for motorcycles. | ||
| Pro Street — Custom style blending drag racing and street bike design. | ||
| Pro Twin — Racing class for twin‑cylinder motorcycles. | ||
| Pro‑Am Rider — Semi‑professional racer competing in both amateur and pro events. | ||
| Profile Tire — Aspect ratio of a tire, height compared to width. | ||
| Profile Tire — Tire aspect ratio. | ||
| Profiled Cam — Camshaft with a specific lobe profile for performance. | ||
| Progressive Fork Springs — Springs with variable rate for smoother suspension. | ||
| Progressive Rate Spring — Suspension spring with variable stiffness. | ||
| Progressive Suspension — Aftermarket suspension company. | ||
| Project Bike — Motorcycle undergoing restoration or customization. | ||
| Project Café Racer — Custom café racer project build. | ||
| Project Chopper — Custom chopper motorcycle under construction. | ||
| Project Restoration — Motorcycle undergoing restoration to original condition. | ||
| Project Streetfighter — Custom streetfighter project build. | ||
| Project Touring Bike — Motorcycle project focused on long‑distance touring. | ||
| Project Tracker — Custom tracker‑style motorcycle project. | ||
| Promoter — Organizer of motorcycle races or events. | ||
| Promotional Bike — Motorcycle built or customized for advertising. | ||
| Prop Rod — Support rod for holding up a motorcycle or component. | ||
| Prop Stand — Another term for kickstand. | ||
| Protective Armor — Impact‑absorbing inserts in jackets, pants, or suits. | ||
| Protective Boots — Motorcycle boots designed for crash protection. | ||
| Protective Gear — Apparel designed to reduce injury in crashes. | ||
| Protective Gloves — Gloves designed for abrasion and impact resistance. | ||
| Protective Jacket — Jacket with armor and abrasion resistance. | ||
| Protective Pants — Riding pants with armor and abrasion resistance. | ||
| Protective Suit — One‑piece riding suit with full protection. | ||
| Protective Vest — Vest with back or chest protection. | ||
| Pro‑Touring Bike — Custom style blending touring comfort with performance. | ||
| Pro‑Twin Exhaust — Aftermarket exhaust designed for twin‑cylinder bikes. | ||
| Pro‑Twin Racing — Racing class for twin‑cylinder motorcycles. | ||
| Provisional License — Learner’s motorcycle license with restrictions. | ||
| Provisional Rider — Rider operating under a learner’s or restricted license. | ||
| Provisional Start — Temporary race start position for a new or guest rider. | ||
| Provisional Team — Team entered on a temporary or trial basis. | ||
| PSI (Pounds per Square Inch) — Unit of pressure, commonly for tire inflation. | ||
| PSI Gauge — Instrument measuring tire or oil pressure in PSI. | ||
| Psych Test — Psychological evaluation for racers or police riders. | ||
| Psyching Out — Intimidating an opponent before a race. | ||
| Psycho Biker — Slang for a reckless or aggressive rider. | ||
| Psycho Run — Slang for a reckless, high‑speed group ride. | ||
| PTO (Power Take‑Off) — Auxiliary drive for powering accessories. | ||
| Public Liability Insurance — Insurance covering damage or injury to others during motorcycle events. | ||
| Public Road Racing — Racing held on closed public roads (e.g., Isle of Man TT). | ||
| Public Road Rally — Rally held on public roads, often requiring permits. | ||
| Public Road Test — Motorcycle test ride conducted on public roads. | ||
| Puck (Knee Slider) — Replaceable pad on racing leathers for cornering contact. | ||
| Puck Rash — Wear marks on a knee slider from aggressive cornering. | ||
| Puck Rash — Wear marks on a knee slider from cornering. | ||
| Pull Back Bars — Handlebars angled toward the rider for comfort. | ||
| Pull Cable — Control cable that pulls (e.g., throttle or clutch). | ||
| Pull Clutch — Clutch operated by pulling a lever. | ||
| Pull In Clutch — Action of pulling the clutch lever. | ||
| Pull Out Pass — Overtaking maneuver by pulling out of a slipstream. | ||
| Pull Start — Starting method using a cord, common on small engines. | ||
| Pull Through — Slang for a successful pass in racing. | ||
| Pull Up Wheelie — Wheelie initiated by pulling up on the bars. | ||
| Pulley — Wheel with grooves used in belt drive systems. | ||
| Pull‑In Clutch — Action of pulling the clutch lever. | ||
| Pull‑Out Pass — Overtaking maneuver by pulling out of a slipstream. | ||
| Pullover Jacket — Riding jacket designed to be pulled over the head. | ||
| Pull‑Through — Slang for a successful pass in racing. | ||
| Pull‑Up Wheelie — Wheelie initiated by pulling up on the bars. | ||
| Pulse Generator — Sensor providing ignition timing signals. | ||
| Pumper Carb — Carburetor with an accelerator pump for instant throttle response. | ||
| Pumper Carburetor — Carb with accelerator pump for instant throttle response. | ||
| Punch Out — Increasing engine displacement by boring cylinders. | ||
| Punch Out Kit — Kit used to increase engine displacement by boring cylinders. | ||
| Punk Biker — Slang for rebellious, non‑traditional rider. | ||
| Punk Patch — Club or subculture patch associated with punk biker groups. | ||
| Punk Rally — Informal motorcycle rally organized by punk riders. | ||
| Punk Rocker — Subculture crossover of punk and biker style. | ||
| Punk Run — Informal ride organized by punk biker groups. | ||
| Punk Style — Custom motorcycle aesthetic influenced by punk culture. | ||
| Punt — Slang for crashing into another rider. | ||
| Punt (Crash) — Slang for colliding with another rider or vehicle. | ||
| Puppy Dog Ride — Slang for a slow, cautious ride. | ||
| Puppy Dog Route — Easy, scenic route often used for beginner rides. | ||
| Pure Gas — Non‑ethanol gasoline. | ||
| Pure Gasoline — Non‑ethanol fuel preferred by some riders for older bikes. | ||
| Push Bar — Bar used to push a disabled motorcycle. | ||
| Push Bike (UK) — Slang for a bicycle. | ||
| Push Button Start — Electric starter activated by a button. | ||
| Push Cable — Control cable that pushes (e.g., throttle return cable). | ||
| Push Cable — Control cable that pushes (e.g., throttle return). | ||
| Push Clutch — Clutch design actuated by pushing a rod. | ||
| Push Over — Slang for a rider knocked off balance. | ||
| Push Rod — Rod transferring motion from camshaft to valve lifter. | ||
| Push Rod Tube — Tube enclosing push rods in OHV engines. | ||
| Push Start — Starting a motorcycle by pushing and releasing the clutch. | ||
| Pushbike — Slang for a bicycle (UK/AUS). | ||
| Pushbike (UK) — Slang for a bicycle, often contrasted with motorbikes. | ||
| Pusher (Sidecar) — Motorcycle in a sidecar rig, as opposed to the sidecar itself. | ||
| Pusher Tire — Rear tire on a sidecar motorcycle. | ||
| Pushing Air — Slang for riding at high speed. | ||
| Pushing Limits — Riding beyond one’s comfort or skill zone. | ||
| Pylon — Passenger riding behind the operator (Canadian slang). | ||
| Pylon Passenger — Canadian slang for a passenger riding pillion. | ||
| Pyramid Fairing — Angular, pyramid‑styled fairing design (root‑word capped at 1). | ||
| Pyramid Seat — Custom seat with pyramid‑inspired styling (root‑word capped at 2). | ||
| Pyramid Style Custom — General term for pyramid‑influenced custom builds (root‑word capped at 3). | ||
| Pyro Exhaust — Slang for extremely hot exhaust gases. | ||
| Pyroclastic Exhaust — Slang for extremely hot exhaust gases. | ||
| Pyrometer — Instrument measuring exhaust gas temperature. | ||
| PZEV (Partial Zero Emissions Vehicle) — Motorcycle or scooter meeting strict emissions standards. | ||
| PZL (Polish Aviation Engine) — Historical motorcycle engines produced by PZL in Poland | ||
