2021 Yamaha YZ125 Guide

2021 Yamaha YZ125

2021 Yamaha YZ125 2021 Yamaha YZ125 2021 Yamaha YZ125

2021 Yamaha YZ125 : AGILITY, ABILITY, VICTORY.

2021 Yamaha YZ125:

Light weight, but heavy on the fun factor. The 125cc liquid‑cooled 2‑stroke is the most fun you can have on two wheels.

Lightweight, quick and easy to maintain, the YZ125 is a perfect transition bike for those too big for 85s but too small or inexperienced for bigger, more powerful four-strokes.

To get to the top in motocross you need to put in the hours at the racetrack. Work hard on your fitness. And you’ve got to make sure you choose the right bike. Light in weight but heavy on the adrenaline factor, the YZ125 is the most fun that you can have on two wheels.

Nothing compares to the YZ125 experience. With its explosive 2-stroke engine power, super-light aluminium chassis and outstanding agility, the YZ125 accelerates, turns and brakes like nothing else. Its industry-leading speed sensitive forks give you precision steering for faster cornering – and the Monocross rear end soaks up the bumps to ride with ease.

The compact body enables you to rapidly shift your body weight and throw the YZ around at will – and its razor sharp styling and coordinated blue wheels show off its factory racer DNA. Discover the ultimate lightweight 2-stroke. And aim for the top.

At a glance

  • YZ-F type Monocross rear suspension system
  • Free-revving and compact 125cc, 2-stroke engine
  • Ultra-light semi-double cradle aluminium frame
  • Fast-action clutch adjuster mechanism
  • YZ-F type 48mm forks, separate air/oil function
  • Easy to adjust 38mm Keihin carburettor
  • Wider footrests for increased controllability
  • Modern bodywork for a lean and sharp image
  • 2-stroke engine technology for easier maintenance
  • Wide range of genuine accessories available
  • GYTR kit available

Race. Win. Enjoy.

Nothing compares to the YZ125 experience. When the gate drops its powerful 125cc 2-stroke engine is built to be revved hard and fast through the 6-speed gearbox.

And at just 94kg wet, the speed and agility of this race bike is ready to astonish you.

We’ve taken the YZ125 to the max, with its responsive spring-type front forks with speed sensitive damping for class-leading performance – and the link-type Monocross rear suspension gives superior shock absorption with enhanced traction.

Featuring Icon Blue bodywork with blue wheels and a slim blue & black seat – as well as gold coloured forks and new graphics, the YZ125 is the ultimate package for every racer – whether you’re upsizing from a YZ85 or looking for the most exciting ride in the world of motocross!

 

 

2021 Yamaha YZ125 Totalmotorcycle.com Key Features
  • Modern Styling
    The front fender, front number plate, radiator shrouds, side number plates, air box, rear fender, fork guards, as well as the rear brake disc protector, rear brake caliper protector and wider foot pegs offer modern, aggressive styling —just like the 4-strokes.
  • Lightweight Frame
    A light aluminum frame houses a patented YPVS™-equipped ripper of an engine for an awesome power-to-weight ratio.
  • Race-Ready Features
    Complete with an aluminum handlebar, titanium foot pegs and gripper seat, the YZ125 is ready to race out of the crate.
  • Ideal Balance
    A pure motocross machine, the light and nimble YZ125 is the perfect choice for riders stepping up from the 85cc class.
  • Rider-Friendly Chassis
    Ultra light weight means nimble handling and less fatigue.
  • 270mm Front Brake
    The large 270mm front disc brake coupled with high-performance pad material offers outstanding machine control and performance, plus exceptional stopping power and controllability.

 

Yamaha Announces Full Lineup of 2021 Motocross Bikes
Race like a Champion with Yamaha’s Redesigned YZ250F and Monster Energy® Yamaha Racing Editions

Yamaha Motor Corporation, USA, introduces its complete lineup of race-ready 2021 motocross bikes including the updated YZ250F. Featuring a thoroughly refined engine, revised frame, new suspension settings and new brakes, the YZ250F continues to dominate the competition with the best balance of power and handling.

“The YZ250F is clearly the leader in its class, winning back-to-back Monster Energy AMA Supercross West Coast 250SX Championships, dominating media shootouts year after year, and by offering industry-exclusive features like the free Power Tuner app, which allows riders to wirelessly tune engine performance for changing track conditions,” said Derek Brooks, Yamaha Motorsports Motorcycle Product Line Manager. “For 2021 the YZ250F gets significant engine, frame, suspension and brake updates to deliver more class-leading power and offer a superior balance of nimble yet confidence-inspiring handling. Yamaha’s entire 2021 motocross lineup continues to raise the bar of competitive performance.”

Also new for 2021, the YZ250F and YZ450F will be offered in special Monster Energy Yamaha Racing Editions, pairing Yamaha’s legendary YZ performance with a new, race team-inspired aesthetic.

In addition to the updated YZ250F and the Monster Energy Racing Edition models, the full two-stroke lineup consisting of the YZ65, YZ85, YZ125 and YZ250, as well as the four-stroke YZ450F, all return for 2021 with the next-generation Team Yamaha Blue color and graphics scheme to further accentuate the advances of the YZ series.

Welcome to the victorYZone
Yamaha’s off-road competition bikes offer the very latest in technology with performance features designed to help racing enthusiasts reach their maximum potential, win races, and stand on top of the podium.

New 2021 YZ250F: Tune, Race, Win
The new 2021 Yamaha YZ125 has been redesigned for a more competitive, greater performing motocross experience. The new 250cc, liquid-cooled, four-stroke, electric start engine features an all-new cylinder head with an improved intake port shape and new camshaft profile, as well a new airbox and intake track, a new silencer, and an updated ECU. These modifications, along with other refinements like an updated transmission and shift cam, a revised clutch design and improved water pump impeller, all help to produce stronger mid- to top-end power and increased peak power, while retaining its class-leading low-end torque.

Tuned specifically for the 2021 YZ250F, the updated lightweight aluminum, bilateral beam frame, and new engine mounts have been redesigned with all-new flex characteristics to improve bump absorption, traction, and cornering performance. The industry-leading, fully adjustable KYB® coil spring-type fork, with enhanced speed-sensitive damping, provides an exceptional balance between comfort and bottoming resistance while the link-type rear suspension features a KYB shock with revised damping characteristics to match the updated chassis. Other chassis components such as the top triple clamp, handlebar mounts, and front axle were also redesigned to complement the new frame. Improved braking performance is achieved with newly engineered lighter weight front and rear brake calipers, larger surface area brake pads, and redesigned front (270mm) and rear (240mm) discs.

The 2021 YZ250F gives racers the edge right out of the gate. Standard equipment includes electric start, a lightweight lithium battery, advanced fuel injection, a front-positioned intake, and rear-positioned exhaust layout to deliver the widest spread of power with reliable performance while balancing the weight for excellent mass-centralization. Racers can adjust their engine performance straight from their phone using the onboard wireless connectivity through the industry’s only free-of-charge complete tuning system, which is highlighted by the Yamaha Power Tuner App. Once settings are dialed in, racers can then choose between two user-defined ECU maps on the fly via the handlebar mounted dual-mode engine map switch. Complemented by new next-generation Team Yamaha Blue color and graphics, the 2021 YZ250F showcases Yamaha’s race-winning pedigree.

New for 2021: Monster Energy Yamaha Racing Editions
Stand out from the crowd. The 2021 YZ250F and 2021 YZ450F now come in new Monster Energy Yamaha Racing Editions. With a factory team-inspired color and graphics package, riders can feel as if they too are part of a Yamaha championship-winning Supercross team.

2021 YZ450F: Tune into Victory
The 2021 YZ450F returns with all of the class-leading features first introduced on the 2020 YZ450F, including an updated engine, cylinder head, frame and technology features for a more powerful and better handling motocross experience. Racers can achieve quicker, smoother race starts through Yamaha’s Launch Control System, adjust their on-track performance using the onboard wireless connectivity through the free-of-charge Yamaha Power Tuner App right from their phone, and choose between two user-defined ECU maps on the fly through the handlebar-mounted dual-mode engine map switch.

2021 YZ125 and YZ250
Yamaha’s YZ125 and YZ250 models return for 2021 to complete Yamaha’s full-size lineup of motocross bikes. With their modern styling, lightweight aluminum frame and industry-leading KYB Speed Sensitive System front forks and KYB fully-adjustable rear shock, the 2021 YZ125 and YZ250 continue their outstanding performance and durability with a rider-friendly chassis and race-ready features.

2021 YZ65 and YZ85
The 2021 youth models are once again ready to tackle the track. The YZ65 and YZ85 are powered by confidence-inspiring 65cc and 85cc two-stroke engines. Featuring the Yamaha Power Valve System, these engines deliver a broad spread of power and torque across the entire rev range, without losing any power at high RPM. Fully adjustable, industry-leading 36mm KYB spring type forks and KYB rear shock contribute to class-leading handling and performance in a wide range of conditions. Four-way, adjustable handlebar positioning, as well as lever-reach adjustability are designed for ultimate rider comfort, regardless of size. Finally, with two-stroke ease of maintenance and Yamaha’s proven durability, the 2021 YZ65 and YZ85 are built to keep kids on the track.

Yamaha bLU cRU Off-Road Racing Contingency Program
All 2021 YZ models are eligible for Yamaha’s current 2020 bLU cRU Off-Road Racing Contingency Program, which features nearly $5 million for Yamaha bLU cRU riders competing in off-road motorcycle racing. YZ riders can earn contingency payouts via a bLU cRU debit card, receive a 10 percent rebate on GYTR parts and accessory purchases of up to $1,000, and receive an instant $45 credit.

 

 

 

2021 Yamaha YZ125 Totalmotorcycle.com Features and Benefits
  • Two-Stroke Power
    Amazingly compact 124cc reed-valve-inducted two-stroke helps produce an awesome power-to-weight ratio.
  • Race-Developed Intake
    Reed-valve spacer improves acceleration across the entire powerband.
  • Yamaha Power Valve System
    Patented YPVS™ combines crisp, hard-hitting bottom-end acceleration with strong midrange and eye-opening top-end.
  • Close-Ratio Transmission
    Six-speed, close-ratio transmission optimizes gear ratios for maximum performance.
  • Digital Ignition
    Digital CDI system delivers precise spark and monitors engine speed to ensure optimal timing for faster, stronger response during hard acceleration.
  • High-Capacity Radiator
    Large-capacity radiator features a 10-row core with four louvers to deliver maximum cooling efficiency at all performance levels.
  • 270mm Front Brake
    Large 270mm front disc brake coupled with high-performance pad material offers outstanding machine control and performance, plus exceptional stopping power and controllability.
  • Aluminum Frame
    A carefully engineered, advanced aluminum frame and swingarm give the YZ125 the best handling in its class.
  • Lightweight Subframe
    Removable aluminum rear subframe is constructed of square-section tubing for reduced weight.
  • Industry-Leading Fork
    The Speed-Sensitive System 48mm KYB® fork and the damping force are controlled by the piston speed for a smoother, more precise ride with 11.8 inches of travel.
  • Advanced KYB® Shock
    Rear, fully adjustable KYB® shock features reduced-friction Kashima Coat™ internals, 12.4 inches of travel, separate adjusters for high- and low-speed compression damping and a full lock oil rebound system for increased comfort. All add up for fantastic rear wheel control and a sweet ride.
  • Race-Ready Tires
    Premium Dunlop® knobbies offer race-spec traction and wear.

Race-Ready Features
Complete with an aluminum handlebar, 2-position adjustable handlebar clamp, wide foot pegs, gripper seat and adjustable clutch lever with works-style cable adjuster, the YZ125 is ready to race out of the crate.

 

 

2021 Yamaha YZ125 – Totalmotorcycle.com USA Specifications/Technical Details
US MSRP Price: $6599 USD
Canada MSRP Price: Starting at $7,599 CDN
Europe/UK MSRP Price: £ See Dealer GBP (On The Road inc 20% Vat)

Engine Type 125cc liquid-cooled 2-stroke; reed-valve inducted
Bore x Stroke 54.0mm x 54.5mm
Compression Ratio 8.6~10.7:1
Fuel Delivery Mikuni® TMX 38
Ignition CDI
Transmission Constant-mesh 6-speed; multiplate wet clutch
Final Drive Chain
Suspension / Front KYB® Speed-Sensitive System inverted fork;
fully adjustable, 11.8-in travel
Suspension / Rear KYB® single shock; fully adjustable, 12.4-in
travel
Brakes / Front Hydraulic disc, 270mm
Brakes / Rear Hydraulic disc, 245mm
Tires / Front 80/100-21 Dunlop® MX52
Tires / Rear 100/90-19 Dunlop® MX52
L x W x H 84.1 in x 32.6 in x 51.0 in
Seat Height 38.4 in
Wheelbase 56.8 in
Rake (Caster Angle) 26.0°
Trail 4.3 in
Ground Clearance 14.4 in
Fuel Capacity** 2.1 gal
Wet Weight*** 207 lb
Warranty 30 Day (Limited Factory Warranty)
Color Team Yamaha Blue

 

 

2021 Yamaha YZ125 – Totalmotorcycle.com Canada Specifications/Technical Details

ENGINE

ENGINE 2-stroke, liquid-cooled, crankcase reed-valve, single
DISPLACEMENT 125 cc
BORE AND STROKE 54.0 x 54.5 mm
COMPRESSION RATIO 8.6~10.7:1
FUEL DELIVERY Mikuni TMX x 38
IGNITION / STARTING CDI / Kick
TRANSMISSION Constant mesh, 6-speed
FINAL DRIVE Chain

 

CHASSIS

SUSPENSION (FRONT) Fully adjustable 48 mm inverted fork / 300 mm (11.8″) wheel travel
SUSPENSION (REAR) Fully adjustable link Monocross / 315 mm (12.4″) wheel travel
BRAKES (FRONT) 270 mm floating disc / twin piston caliper
BRAKES (REAR) 245 mm disc / single piston caliper
TIRES (FRONT) 80/100-21
TIRES (REAR) 100/90-19

CRITICAL DATA

LENGTH 2,135 mm (84.1″)
WIDTH 825 mm (32.5″)
HEIGHT 1,295 mm (51″)
WHEELBASE 1,445 mm (56.9″)
GROUND CLEARANCE 365 mm (14.4″)
SEAT HEIGHT 975 mm (38.4″)
FUEL CAPACITY 8 litres (1.8 imp. gal)
WET WEIGHT 94 kg (207 lb)
COLOUR(S) Yamaha Racing Blue

 

2021 Yamaha YZ125 – Totalmotorcycle.com European Specifications/Technical Details

Engine
Engine type liquid-cooled;2-stroke;Forward-inclined single
cylinder;reed valve with YPVS
Displacement 125cc
Bore x stroke 54.0 mm x 54.5 mm
Compression ratio 8.6 ~ 10.7 : 1
Lubrication system Premix
Clutch Type Wet;multiple-disc coil spring
Ignition system CDI
Starter system Kick
Transmission system Constant Mesh;6-speed
Final transmission Chain
Carburettor Mikuni TMX38
Chassis
Frame Semi double cradle
Caster Angle 26º
Trail 109mm
Front suspension system Upside-down telescopic fork
Rear suspension system Swingarm;(link suspension)
Front travel 300 mm
Rear Travel 315 mm
Front brake Hydraulic single disc, Ø250 mm
Rear brake Hydraulic single disc, Ø245 mm
Front tyre 80/100-21 51M
Rear tyre 100/90-19 57M
Dimensions
Overall length 2137 mm
Overall width 825 mm
Overall height 1295 mm
Seat height 975 mm
Wheel base 1445 mm
Minimum ground clearance 363 mm
Wet weight (including full oil and fuel tank) 94 kg
Fuel tank capacity 8.0L
Oil tank capacity 0.7L

 

Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).

About Michael Le Pard 5065 Articles
"Mr. Totalmotorcycle". Owner and Founder of Total Motorcycle. Supporting over Motorcyclists and Motorcycling for 21 great years. Total Motorcycle is my pride and joy and being able to reach out 330 million people has been incredible but I could not have done it without the support of my visitors, readers and members, thank you so much! You are making a difference to millions of riders worldwide. Thank you.