Published October 10, 2025 by Michael Le Pard , Editor‑in‑Chief
Total Motorcycle Bikers Dictionary
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| # | A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z | |
| Dictionary Letter Navigation Menu | |||||||||||||
MSF – Motorcycle Safety Foundation (Training). The highly recommended way to learn how to properly and safely ride a motorcycle. Offered in many countries around the world for a very reasonable price.
| Mach Number — Speed relative to sound, slang for extreme speed. | ||
| Machine Shop — Workshop for fabricating or repairing parts. | ||
| Machining — Precision cutting or shaping of metal parts. | ||
| Macro Tuning — Broad adjustments to fueling or suspension. | ||
| Mad Max — A circular burnout where the rider spins 360° with the front wheel locked. | ||
| Mag Wheels — Cast alloy wheels, lighter than steel spoked wheels. | ||
| Magnesium Wheels — Lightweight racing wheels made of magnesium alloy. | ||
| Magneto — Self‑contained ignition device producing spark without external power. | ||
| Magnetorheological Suspension — Advanced suspension using magnetic fluid. | ||
| Magnetron Ignition — Small engine ignition system. | ||
| Magura Controls — German brand of controls. | ||
| Magura Controls — German brand of motorcycle controls. | ||
| Magura Levers — High‑performance aftermarket clutch and brake levers. | ||
| Main Bearing — Engine crankshaft bearing. | ||
| Main Bearing Failure — Engine failure caused by worn crankshaft bearings. | ||
| Main Fuse — Primary fuse protecting the electrical system. | ||
| Main Jet — Carburetor jet controlling fuel at mid‑throttle. | ||
| Main Jet Tuning — Adjusting carburetor jet for mid‑range performance. | ||
| Mainshaft — Transmission shaft carrying gears. | ||
| Mainshaft Bearing — Transmission bearing supporting the mainshaft. | ||
| Maintenance Interval — Scheduled mileage or time for service. | ||
| Maintenance Stand — Stand used for chain service or wheel removal. | ||
| Maintenance‑Free Battery — Sealed battery requiring no topping up. | ||
| Major Overhaul — Complete engine rebuild. | ||
| Major Service — Comprehensive scheduled maintenance. | ||
| Make and Model — Manufacturer and specific motorcycle designation. | ||
| Makeover Bike — Motorcycle rebuilt or customized. | ||
| Malfunction Indicator Light (MIL) — Dashboard warning light for engine issues. | ||
| Malossi — Italian performance parts manufacturer. | ||
| Mama — Slang for a woman associated with biker gangs. | ||
| Man Cave Garage — Rider’s personal workshop. | ||
| Mandrel Bend — Smooth exhaust bend without crimping. | ||
| MANF (Multi Adjustable Nut Fer)* — UK slang for an adjustable spanner. | ||
| Manifold — Pipes delivering fuel/air to the engine and channeling exhaust away. | ||
| Manifold Pressure Sensor — Sensor measuring intake vacuum. | ||
| Manual Choke — Lever‑operated choke for cold starts. | ||
| Manual Kill Switch — Handlebar switch cutting ignition. | ||
| Manual Petcock — Fuel valve operated by hand. | ||
| Manual Tire Pump — Hand pump for inflating tires. | ||
| Manual Transmission — Gearset enabling riders to change drive ratios manually. | ||
| Manx Norton — Legendary Isle of Man TT racing motorcycle. | ||
| Map Sensor — Engine sensor measuring manifold pressure. | ||
| Mapping (ECU) — Electronic fuel/ignition programming. | ||
| Marathon Ride — Extremely long‑distance ride. | ||
| Marble Paint — Custom paint with marbled effect. | ||
| Marine Grease — Waterproof grease used on motorcycles. | ||
| Market Street Commandos — Early motorcycle gang. | ||
| Marking Territory — Slang for oil leaks. | ||
| Marooned Rider — Rider stranded by breakdown. | ||
| Marque — Make or brand of motorcycle. | ||
| Marquis deSaddle — Slang for an uncomfortable motorcycle seat. | ||
| Marshalling — Organizing riders at an event or race. | ||
| Martini Fairing — Small café racer fairing. | ||
| Martini Glass Fairing — Slang for small café racer fairing. | ||
| Masey Fergason / JCB / Tracker — Slang nickname for Harley‑Davidson motorcycles. | ||
| Mash‑Up Build — Custom combining multiple bike styles. | ||
| Mash‑Up Custom — Bike combining multiple styles. | ||
| Mass Airflow Sensor — Sensor measuring intake air volume. | ||
| Mass Centralization — Design principle of keeping weight low and central. | ||
| Mass Centralization Design — Engineering principle for handling. | ||
| Mass Damper — Device reducing vibration. | ||
| Mass Damper System — Device reducing vibration. | ||
| Mass Start — Race start with all riders lined up. | ||
| Mass Start Race — Race start with all riders lined up. | ||
| Master Builder — Acclaimed custom bike builder. | ||
| Master Builder Title — Recognition for custom builders. | ||
| Master Cylinder — Hydraulic component that forces brake fluid to calipers or clutch. | ||
| Master Cylinder Reservoir — Fluid container for brakes or clutch. | ||
| Master Key — Key coded to multiple locks. | ||
| Master Key Ignition — Key coded to multiple locks. | ||
| Master Link — Chain link that can be removed for repair or replacement. | ||
| Master Link Clip — Clip securing a chain’s master link. | ||
| Master Technician — Highest level of factory‑trained mechanic. | ||
| Master Technician Certification — Highest level of mechanic training. | ||
| Matchless — Historic British motorcycle brand. | ||
| Matchless Motorcycle — Historic British brand. | ||
| Material Fatigue — Weakening of parts over time. | ||
| Material Fatigue Failure — Structural failure from stress cycles. | ||
| Matte Black — Popular non‑gloss paint finish. | ||
| Matte Black Finish — Popular non‑gloss paint. | ||
| Matte Clear Coat — Protective matte finish. | ||
| Matte Finish — Non‑gloss paint finish. | ||
| Mattress Cover / Ground Cover — Slang for a young woman in biker culture. | ||
| Max G‑Force — Maximum cornering force. | ||
| Max Lean Angle — Maximum safe lean before loss of traction. | ||
| Max Load Rating — Tire’s maximum weight capacity. | ||
| Max RPM — Maximum safe engine speed. | ||
| Max RPM Redline — Maximum safe engine speed. | ||
| Max Speed Run — Attempt at top speed. | ||
| Max Torque — Peak torque output of an engine. | ||
| Maximum Load — Tire’s maximum weight capacity, listed on sidewall. | ||
| Maxi‑Scooter — Larger‑engine scooter, typically 250cc and above. | ||
| Maxxis Rubber — Tires from Maxxis brand. | ||
| Maxxis Tires — Popular motorcycle tire brand. | ||
| Mayhem Rally — Chaotic group ride. | ||
| Mayhem Ride — Slang for chaotic group ride. | ||
| Mazda Rotary Bike — Rare rotary‑engine motorcycle. | ||
| Mazda Rotary Conversion — Motorcycle with rotary engine swap. | ||
| MC / M.C. — Motorcycle Club; also outlaw club designation. | ||
| Mean Machine — Slang for a powerful motorcycle. | ||
| Mean Streak — Kawasaki cruiser model. | ||
| Mean Streak 1500 — Kawasaki cruiser model. | ||
| Mechanic — Slang: “wrench,” someone who repairs motorcycles. | ||
| Mechanical Advance — Ignition timing advance via weights/springs. | ||
| Mechanical Advance Ignition — Timing advance via weights. | ||
| Mechanical Clutch — Cable‑operated clutch. | ||
| Mechanical Clutch Cable — Cable‑operated clutch. | ||
| Mechanical Seal — Seal preventing fluid leaks. | ||
| Mechanical Seal Failure — Seal breakdown causing leaks. | ||
| Mechanical Sympathy — Rider’s care in operating machinery | ||
| Mechanical Sympathy Riding — Smooth, careful riding style. | ||
| Medusa Headers — Exhaust resembling snake heads. | ||
| Medusa Pipes — Exhaust headers resembling a bundle of snakes. | ||
| Meet (Bike Meet) — Gathering of riders or motorcycle events. | ||
| Mega Mile Rider — Rider who logs extremely high annual mileage. | ||
| Mega Tourer — Large touring motorcycle. | ||
| Mega Tourer Bike — Large touring motorcycle. | ||
| Megacycle Cams — Aftermarket performance camshaft brand. | ||
| Megacycle Performance Cams — Aftermarket camshafts. | ||
| Megaphone — Outwardly tapered high‑performance exhaust. | ||
| Megaphone Exhaust — Tapered exhaust pipe for tuning and sound. | ||
| Megaphone Exhaust Tip — Tapered exhaust for tuning. | ||
| Megaton — Slang for speeds over 150 mph. | ||
| Megaton Speed — Slang for speeds over 150 mph. | ||
| Meguiar’s Detailing — Popular polish brand. | ||
| Meguiar’s Polish — Popular detailing product. | ||
| Meguiar’s Polish — Popular motorcycle detailing product. | ||
| Meltdown — Engine overheating failure. | ||
| Meltdown Engine — Overheated engine failure. | ||
| Member Ride — Club‑organized group ride. | ||
| Member Ride Event — Club‑organized ride. | ||
| Memory Effect — Battery degradation from repeated partial charges. | ||
| Menace Bars — Tall ape‑hanger handlebars. | ||
| Menace Handlebars — Tall ape‑hanger bars. | ||
| Mercenary Rider — Rider who switches clubs for benefits. | ||
| Mercenary Rider Term — Rider switching clubs. | ||
| Meriden Triumph — Classic Triumph factory era (UK). | ||
| Meriden Triumph Era — Classic Triumph factory period. | ||
| Mesh Jacket — Lightweight protective jacket with airflow. | ||
| Mesh Riding Jacket — Ventilated protective jacket. | ||
| Metal Flake Custom Paint — Sparkling paint finish. | ||
| Metal Flake Paint — Sparkling custom paint finish. | ||
| Metal Lathe — Tool used in custom fabrication. | ||
| Metal Lathe Tool — Machine tool for fabrication. | ||
| Metallic Brake Pads — Brake pads with metal content. | ||
| Metering Jet Rod — Carburetor fuel control rod. | ||
| Metering Rod — Carburetor fuel control rod. | ||
| Metric Cruiser — Cruiser using metric fasteners (e.g., 10mm, 14mm). | ||
| Metric Cruiser Bike — Cruiser with metric fasteners. | ||
| Metric Fastener Kit — Metric bolts and nuts. | ||
| Metric Fasteners — Bolts/nuts sized in millimeters. | ||
| Metric Socket Set — Tools for metric bolts. | ||
| Metric Tools — Tools sized for metric fasteners. | ||
| Metzeler Rubber — German tire brand. | ||
| Metzeler Tires — German tire manufacturer. | ||
| Mexican Socket Set — Slang for a crescent wrench. | ||
| MIC (Motorcycle Industry Council) — U.S. trade association. | ||
| Microfiche — Old parts catalog format. | ||
| Microfiche Catalog — Old parts catalog format. | ||
| Micron Exhaust — Aftermarket exhaust brand. | ||
| Micron Exhaust System — Aftermarket exhaust brand known for performance pipes. | ||
| Mid Controls — Foot controls positioned mid‑bike. | ||
| Mid Controls Setup — Foot controls mounted mid‑frame for balanced ergonomics. | ||
| Mid‑Corner Apex — Racing line through the middle of a corner. | ||
| Mid‑Corner Line — Racing line through the middle of a corner. | ||
| Mid‑Life Crisis Bike — Motorcycle bought as a lifestyle statement. | ||
| Mid‑Life Crisis Purchase — Motorcycle bought as a lifestyle statement. | ||
| Mid‑Mount Pegs — Pegs mounted mid‑frame. | ||
| Mid‑Range Power — Engine performance between low and high RPM. | ||
| Mid‑Range RPM — Engine performance range between low and high revs. | ||
| Mid‑Size Cruiser — Cruiser between 500–900cc. | ||
| Mid‑Size Sportbike — Sportbike between 600–750cc. | ||
| Mid‑Stroke Damping — Suspension behavior mid‑travel. | ||
| Mid‑Weight Bike — Motorcycle between lightweight and heavyweight. | ||
| Mid‑Weight Motorcycle — Between lightweight and heavyweight. | ||
| Mileage Contest — Competition for most miles ridden. | ||
| Mileage Log — Record of distance traveled. | ||
| Mileage Logbook — Record of distance traveled. | ||
| Mileage Queen — Motorcycle kept pristine with very low miles, often more for show than riding. | ||
| Mileage Run — Long ride done specifically to rack up distance, often for Iron Butt or endurance awards. | ||
| Mileage Run Event — Ride to accumulate miles. | ||
| Mileage Tracker — Device or app used to log miles ridden. | ||
| Mileage Tracker Device — Electronic mileage logger. | ||
| Milk Crate Carrier — Improvised luggage solution using a plastic crate strapped to the bike. | ||
| Milk Crate Rack — Improvised luggage rack. | ||
| Mill — Slang for an engine. | ||
| Millennium Custom — Bike built for year 2000. | ||
| Millennium Falcon Bike — Slang for a heavily modified, cobbled‑together machine. | ||
| Millwright Fabricator — Rider who builds parts. | ||
| Millwright Rider — Rider who fabricates or repairs their own parts. | ||
| Milwaukee Vibrator — Slang for Harley‑Davidson. | ||
| Minger — Slang for a wheelie. | ||
| Mini Ape Bars — Short ape‑hanger bars. | ||
| Mini Ape Hangers — Short ape‑hanger handlebars. | ||
| Mini Bike — Small motorcycle, often under 50cc. | ||
| Mini Bike Racer — Small racing bike. | ||
| Mini Moto — Pocket‑sized racing bike. | ||
| Mini Moto Racing — Pocket bike racing. | ||
| Mini Tourer — Small displacement touring motorcycle. | ||
| Mini Tourer Bike — Small touring motorcycle. | ||
| Minibike — Small, often non‑street‑legal motorcycle. | ||
| Mini‑Fairing — Small windscreen or bikini fairing. | ||
| Mini‑Fairing Screen — Small windscreen. | ||
| Minimalist Build — Custom stripped down to only essential parts. | ||
| Minimalist Custom — Stripped‑down build. | ||
| Minimoto Racing — Racing series for pocket bikes. | ||
| Minimoto Track — Pocket bike track. | ||
| Mini‑Truck Hauler — Compact truck used to transport motorcycles. | ||
| Minnow Tank — Slang for a very small fuel tank. | ||
| Minnow Tank Custom — Very small fuel tank. | ||
| Mirror Block‑Off Plates — Plates covering mirror mounts. | ||
| Mirror Block‑Offs — Plates covering mirror mounts on race bikes. | ||
| Mirror Extender Kit — Brackets extending mirrors. | ||
| Mirror Extenders — Brackets to move mirrors outward for better visibility. | ||
| Mirror Finish — Highly polished chrome or paint surface. | ||
| Mirror Finish — Highly polished chrome or paint. | ||
| Mirror Finish Chrome — Highly polished finish. | ||
| Mirror Stalk Arms — Arms holding mirrors. | ||
| Mirror Stalks — Arms that hold mirrors in place. | ||
| Misfire — Engine combustion failure in one or more cylinders. | ||
| Misfire Condition — Engine combustion failure. | ||
| Missile Bike — Slang for an extremely fast sportbike. | ||
| Missile Sportbike — Very fast sportbike. | ||
| Mission Charity Ride — Purpose‑driven ride. | ||
| Mission Ride — Charity or purpose‑driven group ride. | ||
| Mistuned Carb — Carburetor not properly adjusted, causing poor running. | ||
| Mistuned Carb — Carburetor not properly adjusted. | ||
| Mistuned Carburetor — Improperly adjusted carb. | ||
| Mix Ratio — Oil‑to‑fuel ratio for two‑stroke engines. | ||
| Mix Ratio Two‑Stroke — Oil‑to‑fuel ratio. | ||
| Mixed Surface Ride — Ride covering pavement, gravel, and dirt. | ||
| Mixed Surface Touring — Ride covering multiple surfaces. | ||
| Mixer — Slang for two‑stroke oil. | ||
| Mixer Oil — Two‑stroke oil. | ||
| MMI (Motorcycle Mechanics Institute) — U.S. training school. | ||
| MMS (Motorcycle Management System) — Electronic control system. | ||
| MMS Control Unit — Motorcycle management system. | ||
| Mobile Chicane — Slang for a slow rider on track. | ||
| Mobile Chicane Rider — Slow rider on track. | ||
| Mobile Mechanic — Mechanic who travels to service motorcycles. | ||
| Mobile Mechanic Service — Traveling mechanic. | ||
| Mobilization Rally — Large organized ride. | ||
| Mobilization Ride — Large organized ride for a cause. | ||
| Mock‑Up Build — Temporary assembly to test fitment. | ||
| Mock‑Up Frame — Temporary frame assembly. | ||
| Mod (Modernist) — 1960s UK scooter subculture. | ||
| Mod Culture — 1960s UK scooter subculture. | ||
| Model Year — Year designation of a motorcycle. | ||
| Model Year Designation — Year of manufacture. | ||
| Modified Frame — Frame altered from stock. | ||
| Modified Frame Build — Altered motorcycle frame. | ||
| Modified Suspension — Suspension upgraded or altered. | ||
| Modified Suspension Setup — Upgraded suspension. | ||
| Modular Helmet — Helmet with flip‑up chin bar. | ||
| Modular Helmet Design — Flip‑up chin bar helmet. | ||
| Moisture Trap — Device in air system preventing water entry. | ||
| Moisture Trap Valve — Prevents water entry. | ||
| Moly Grease — Grease with molybdenum disulfide. | ||
| Moly Grease Compound — Lubricant with molybdenum. | ||
| Moment of Inertia — Resistance of mass to rotation. | ||
| Moment of Inertia Effect — Resistance to rotation. | ||
| Money Burner — Slang for Harley‑Davidson rider. | ||
| Monkey Butt — Soreness from long rides or poor seat comfort. | ||
| Mono — Slang for a wheelie. | ||
| Monoblock Brake Caliper — One‑piece caliper. | ||
| Monoblock Caliper — Brake caliper machined from one piece. | ||
| Monocoque — Structure made as one unit from sheet material. | ||
| Monocoque Chassis — Frame and body integrated into one stressed unit. | ||
| Monocoque Frame — Integrated frame/body. | ||
| Monocross Rear Suspension — Yamaha’s single‑shock system. | ||
| Monocross Suspension — Yamaha’s single‑shock rear suspension. | ||
| Monocycle — One‑wheeled motorcycle. | ||
| Monocycle Vehicle — One‑wheeled motorcycle. | ||
| Monoshock — Single rear shock absorber. | ||
| Monoshock Rear — Single rear shock. | ||
| Monotube Fork Design — Single‑tube damping fork. | ||
| Monotube Forks — Forks with single‑tube damping. | ||
| Moon Eyes — Custom accessory brand. | ||
| Moon Eyes Accessories — Custom brand. | ||
| Moon Tank — Small auxiliary fuel tank. | ||
| Moon Tank Auxiliary — Small fuel tank. | ||
| Moonshine Haul — Outlaw liquor transport. | ||
| Moonshine Run — Slang for outlaw liquor transport rides. | ||
| Moose Bars — Heavy crash bars. | ||
| Moose Bars Crash Guards — Heavy crash bars. | ||
| Moped — Motorized bicycle, usually under 50cc. | ||
| Moped Racer — Modified moped for racing. | ||
| Moped Racer Build — Modified moped. | ||
| Moped Tuner — Specialist in modifying mopeds. | ||
| Moped Tuner Specialist — Moped modifier. | ||
| Mopedder — Rider of a moped. | ||
| Mopedder Rider — Moped rider. | ||
| Moral Support Companion — Encouragement rider. | ||
| Moral Support Rider — Companion rider for encouragement. | ||
| Morgue Bike — Slang for a dangerous, crash‑prone bike. | ||
| Morgue Bike Slang — Dangerous bike. | ||
| Morning Ride — Early day ride. | ||
| Morning Ride Tradition — Early day ride. | ||
| Mortal Coil — Slang for life, used in biker poetry. | ||
| Mortal Coil Phrase — Slang for life. | ||
| Mortar Exhaust Pipes — Cannon‑like pipes. | ||
| Mortar Pipes — Straight, cannon‑like exhausts. | ||
| Mosfet Regulator — Modern voltage regulator. | ||
| Mosfet Regulator Upgrade — Modern regulator. | ||
| Most Miles Award — Recognition for distance riding. | ||
| Most Miles Recognition — Distance award. | ||
| MOT (UK) — Annual roadworthiness test for vehicles. | ||
| Motard — Supermoto bike. | ||
| Motard Bike — Supermoto. | ||
| Motard Conversion — Dirt bike converted to supermoto. | ||
| Motard Conversion Kit — Dirt to supermoto. | ||
| Motard Tires — Street tires for dirt bikes. | ||
| Motard Tires Setup — Street tires on dirt bikes. | ||
| Mother Road — Nickname for Route 66. | ||
| Mother Road Route 66 — Nickname for Route 66. | ||
| Mother Ship — Slang for Harley‑Davidson HQ. | ||
| Mother Ship Harley HQ — Harley‑Davidson HQ. | ||
| Motocross — Off‑road racing discipline. | ||
| Motocross Bike — Off‑road competition motorcycle. | ||
| Motocross Boots — Tall protective boots. | ||
| Motocross Boots Gear — Tall boots. | ||
| Motocross Discipline — Off‑road racing. | ||
| Motocross Gear — Protective clothing for MX. | ||
| Motocross Gear Apparel — MX clothing. | ||
| Motocross Track — Closed‑course dirt track. | ||
| Motocross Track Course — Dirt track. | ||
| MotoGP — Premier class of motorcycle racing. | ||
| MotoGP Class — Premier racing. | ||
| MotoGP Replica — Street bike styled after GP machines. | ||
| MotoGP Replica Bike — Street GP‑styled. | ||
| Motojournalist — Motorcycle journalist. | ||
| Motojournalist Writer — Motorcycle journalist. | ||
| Motolite — Lightweight racing battery. | ||
| Motolite Battery — Lightweight battery. | ||
| Motometer — Early motorcycle speedometer. | ||
| Motometer Gauge — Early speedometer. | ||
| Motopark — Dedicated motorcycle riding park. | ||
| Motopark Venue — Riding park. | ||
| Motor Maid — Member of the women’s riding club founded in 1940. | ||
| Motor Maid Club — Women’s riding club. | ||
| Motor Pool — Collection of motorcycles for group use. | ||
| Motor Pool Fleet — Group of motorcycles. | ||
| Motor Psycho — Rider obsessed with motorcycles. | ||
| Motor Psycho Rider — Obsessed rider. | ||
| Motor Unit — Engine assembly. | ||
| Motor Unit Assembly — Engine unit. | ||
| Motor Valve — Engine valve. | ||
| Motor Valve Component — Engine valve. | ||
| Motorbike — UK/Europe term for motorcycle. | ||
| Motorcycle — General term for two‑wheeled motor vehicle. | ||
| Motorcycle Awareness Event — Safety ride. | ||
| Motorcycle Awareness Ride — Ride promoting safety awareness. | ||
| Motorcycle Carrier — Hitch‑mounted bike carrier. | ||
| Motorcycle Carrier Hitch — Hitch carrier. | ||
| Motorcycle Cop — Police officer on a motorcycle. | ||
| Motorcycle Cop Officer — Police motor officer. | ||
| Motorcycle Drag Racing — Straight‑line motorcycle racing. | ||
| Motorcycle Drag Strip — Drag racing. | ||
| Motorcycle Dynamics — Study of motorcycle motion, balance, and handling. | ||
| Motorcycle Dynamics Study — Handling science. | ||
| Motorcycle Ergonomics — Study of rider comfort and control. | ||
| Motorcycle Ergonomics — Study of rider comfort, posture, and control layout. | ||
| Motorcycle Ergonomics Design — Comfort study. | ||
| Motorcycle Film — Movie featuring motorcycles as central theme. | ||
| Motorcycle Film Feature — Movie with bikes. | ||
| Motorcycle Friendly — Business or location welcoming to riders. | ||
| Motorcycle Friendly Venue — Rider‑friendly business. | ||
| Motorcycle Gang — Outlaw motorcycle club. | ||
| Motorcycle Gang Outlaw — Outlaw club. | ||
| Motorcycle Hand Signals — Standardized rider communication gestures. | ||
| Motorcycle Insurance — Policy covering motorcycle liability and damage. | ||
| Motorcycle Insurance Policy — Insurance. | ||
| Motorcycle Jacket — Protective riding jacket. | ||
| Motorcycle Jacket Gear — Protective jacket. | ||
| Motorcycle Jockeys — Slang for anyone who rides. | ||
| Motorcycle Lift — Hydraulic lift for servicing bikes. | ||
| Motorcycle Lift Stand — Hydraulic lift. | ||
| Motorcycle Museum — Museum dedicated to motorcycles. | ||
| Motorcycle Museum Exhibit — Museum. | ||
| Motorcycle Rally — Large gathering of riders. | ||
| Motorcycle Rally Event — Gathering. | ||
| Motorcycle Show — Exhibition of motorcycles. | ||
| Motorcycle Show Display — Exhibition. | ||
| Motorcycle Stunt — Trick performed on a motorcycle. | ||
| Motorcycle Stunt Trick — Trick riding. | ||
| Motorcycle Touring — Long‑distance riding. | ||
| Motorcycle Touring Ride — Long‑distance. | ||
| Motorcycle Trailer — Trailer for hauling bikes. | ||
| Motorcycle Trailer Hauler — Trailer. | ||
| Motorcycle Training — Rider education programs. | ||
| Motorcycle Training Course — Rider training. | ||
| Motorcycle Trip — Journey by motorcycle. | ||
| Motorcycle Trip Journey — Motorcycle trip. | ||
| Motorcycle Wash — Fundraiser or cleaning service. | ||
| Motorcycle Wash Fundraiser — Wash event. | ||
| Motorcycle‑Specific Cut — Clothing tailored for riding posture. | ||
| Motorcycling Brotherhood — Camaraderie among riders. | ||
| Motorcycling Brotherhood Bond — Rider camaraderie. | ||
| Motorcycling Culture — Lifestyle and traditions of riders. | ||
| Motorcycling Culture Lifestyle — Rider culture. | ||
| Motorcycling Heritage — History of motorcycles. | ||
| Motorcycling Heritage History — Motorcycle history. | ||
| Motorcycling Lifestyle — Way of life centered on riding. | ||
| Motorcycling Lifestyle Way — Lifestyle. | ||
| Motorcycling Spirit — Passion for riding. | ||
| Motorcycling Spirit Passion — Passion. | ||
| Motorcycling Tradition — Customs of the riding community. | ||
| Motorcycling Tradition Custom — Tradition. | ||
| Motorcyclist — Person who rides motorcycles. | ||
| Motorcyclist Rider — Rider. | ||
| Motorhead — Enthusiast obsessed with engines. | ||
| Motorhead Enthusiast — Engine lover. | ||
| Motormania — Frenzy for motorcycles. | ||
| Motormania Frenzy — Motorcycle craze. | ||
| Motormaster — Skilled rider or mechanic. | ||
| Motormaster Expert — Skilled rider. | ||
| Motormouth — Rider who talks excessively. | ||
| Motorpsycho — Rider totally dedicated to motorcycling. | ||
| Motorsport — Competitive racing involving motorcycles. | ||
| Motorsport Park — Venue for racing. | ||
| Motorsport Rider — Rider competing in motorsports. | ||
| Motorsport Spirit — Passion for racing. | ||
| Motorsport Tradition — Racing heritage. | ||
| Mototaxi — Motorcycle used as a taxi. | ||
| Mototherapy — Riding as a form of stress relief. | ||
| Mount — Slang for a motorcycle. | ||
| Mount Point — Location on frame for attaching parts. | ||
| Mountain Bike (Motorized) — Off‑road motorcycle for trails. | ||
| Mountain Pass Ride — Ride through twisty mountain roads. | ||
| Mountain Road — A winding road through mountains, popular with riders for its curves. | ||
| Mountain Switchback — Sharp uphill or downhill turns common in mountain riding. | ||
| Mountain Touring — Long‑distance motorcycle touring through mountain regions. | ||
| Mountain Touring — Touring through mountain regions. | ||
| Mounting Bracket — Hardware used to attach accessories or parts to a motorcycle. | ||
| Mounting Hardware — Bolts, clamps, and fasteners for securing motorcycle parts. | ||
| Mounting Point — Frame location for components. | ||
| Mounting Point — Frame or chassis location for attaching components. | ||
| Mouse Trap Clutch — Slang for Harley’s early clutch assist mechanism. | ||
| Mouthpiece (Club) — Spokesperson for a motorcycle club. | ||
| Move Over Law — Traffic law requiring vehicles to yield to emergency or roadside vehicles, affecting riders’ safety. | ||
| Move Over Law — Traffic law requiring vehicles to yield. | ||
| Movie Bike — Motorcycle made famous by film or TV. | ||
| Moving Violation — Traffic offense committed while the motorcycle is in motion. | ||
| MPG (Miles Per Gallon) — Measurement of fuel economy. | ||
| MRA (Motorcycle Riders Association) — Advocacy group for motorcyclists. | ||
| MRF (Motorcycle Riders Foundation) — U.S. lobbying group for motorcyclists’ rights. | ||
| MRF (Motorcycle Riders Foundation) — U.S. lobbying group. | ||
| MSF (Motorcycle Safety Foundation) — Organization providing rider training and safety courses. | ||
| MSO (Manufacturer’s Statement of Origin) — Document proving ownership of a new motorcycle. | ||
| MT (Metric Ton) — Measurement sometimes used for motorcycle weight. | ||
| MT Series — Yamaha’s “Master of Torque” lineup. | ||
| MT Series — Yamaha’s “Master of Torque” naked bike lineup. | ||
| MTB (Motorized Trail Bike) — Off‑road motorcycle for trail riding. | ||
| Mud Puppies — Slang for ATV/ATC riders. | ||
| Muffler — Exhaust component reducing noise and controlling back pressure. | ||
| Muffler — Exhaust device reducing noise and controlling back pressure. | ||
| Muffler — Exhaust device reducing noise. | ||
| Muffler Bearing (Joke) — Nonexistent part used to tease new riders. | ||
| Muffler Delete — Removal of muffler for louder exhaust. | ||
| Muffler Packing — Fiberglass or material inside mufflers to absorb sound. | ||
| Muffler Tip — Decorative or performance end piece of an exhaust. | ||
| Muffler Tip — Decorative or performance exhaust tip. | ||
| Multi‑Cylinder Engine — Engine with more than one cylinder. | ||
| Multi‑Disc Clutch — Clutch with multiple friction plates. | ||
| Multi‑Function Display — Digital dashboard showing multiple readouts. | ||
| Multi‑Grade Oil — Engine oil rated for multiple temperature ranges. | ||
| Multi‑Grade Oil — Oil rated for multiple temperature ranges. | ||
| Multimeter — Electrical testing tool. | ||
| Multimeter — Electrical tool for testing voltage, current, and resistance. | ||
| Multi‑Spoke Wheel — Wheel with multiple spokes for strength and style. | ||
| Multi‑Strada — Ducati’s adventure‑touring line. | ||
| Multi‑Surface Ride — Ride covering pavement, gravel, dirt. | ||
| Multi‑Tool — Compact tool with multiple functions for riders. | ||
| Multi‑Tool — Compact tool with multiple functions. | ||
| Munch Mammut — Rare German motorcycle with car‑sized engine. | ||
| Mural Tank Art — Custom painted artwork on a fuel tank. | ||
| Muscle Bike — Large‑displacement naked bike with brute power. | ||
| Muscle Cruiser — Cruiser emphasizing power and torque. | ||
| Muscle Cruiser — Cruiser motorcycle emphasizing power and torque. | ||
| Muscle Memory — Rider’s ingrained physical habits for control. | ||
| Muscle Twin — Large V‑twin cruiser emphasizing torque. | ||
| Mushroom Valve — Valve shaped like a mushroom, common in engines. | ||
| Mushrooms (Crash Bungs) — Frame sliders protecting fairings in a crash. | ||
| Music Bike — Motorcycle with integrated sound system. | ||
| Mustang Seat — Popular aftermarket seat brand. | ||
| Mutant Build — Custom bike blending multiple styles. | ||
| Mutt Motorcycle — Slang for a bike built from mixed parts. | ||
| MV Agusta — Italian motorcycle manufacturer. | ||
| MVA (Motor Vehicle Accident) — Legal/insurance term for a crash. | ||
| MVI (Motor Vehicle Inspection) — Mandatory safety inspection in some regions. | ||
| MVP Rider — Slang for standout rider in a group. | ||
| Mystery Tour — Social ride with unknown destination revealed en route. | ||
| MZ Motorcycles — Historic East German motorcycle brand. | ||
