With its low weight and free-revving 125cc, 2-stroke engine, the Yamaha YZ125 is an ideal race bike for teenage riders who are serious about making a name for themselves. Along with the YZ85 and YZ250 2-strokes and the YZ-F 4-strokes, the YZ125 forms an integral part of the Yamaha motocross line up and the 125 model is aimed primarily at riders between 15 and 19 years of age.
Despite the fact that the spotlight has undoubtedly been focused on the 4- stroke scene in recent years, the YZ125 continues to appeal to the significant number of riders who regard the 125cc 2-stroke as one of the best ways to develop their racing skills before graduating to the pro class on board a YZ250F or YZ450F. After race wins and a 2nd overall position in the 2013 EMX 125 European Championship, the current YZ125 is once again showing its race winning ability in the 2014 series. After the first 4 (of 7) rounds in this highly competitive championship, Yamaha have two bikes in the top four standings, demonstrating that the YZ125 can race and win at the highest level in one of the world’s most prestigious 2-stroke series.
For the 2015 model year the YZ125 2-stroke is completely revitalised with a range of stylistic changes that are designed to deliver a lean and modern new image – while important technical updates deliver refined handling characteristics.
The redesigned bodywork and new graphics project a sharp and lightweight appearance that complements the look of the latest generation of YZ-F 4-strokes. The new front and rear fenders, number plate, air scoops, airbox/side covers, fork protectors and seat cover give a thoroughly up to the minute ‘factory-bike’ feel – and the bold new ‘Speed Block’ graphics and big YZ logo on the tank and scoops accentuate the dynamic and aggressive design image pioneered by the recent YZs.
Significant improvements have been made to the front and rear suspension for 2015 and the new systems are now the same as those used on the latest YZ-F 4-stroke models. The 48mm upside down front forks and the link-type Monocross rear suspension run with YZ125-specific settings in order to ensure optimum traction and good terrain following characteristics. Both the front and rear systems are fully adjustable to suit varied track conditions and different rider weights and riding styles.
For quick and easy adjustability the 2015 model is equipped with the latest YZ-F 4-stroke type handlebar-mounted clutch adjuster mechanism, and the YZ125 is also fitted with wider YZ-F type footrests that give improved feel and comfort – especially on jumps and whoops. Completing the 2015 package are the latest pattern Dunlop tyres, as well as a YZ-F style rear sprocket, rear disc guard and rear caliper guard.
YRRD Racing Kit
Yamaha offer special kit parts for the YZ125 that have been developed in association with the highly respected Italian company YRRD (Yamaha Rinaldi R&D). Run by former World Champion Michele Rinaldi – who is the manager of the Yamaha Factory Racing motocross team – YRRD has developed a professional quality race kit for the 2015 YZ125 that features a wide range of performance boosting parts.
The kit includes:
Sand-cast cylinder head
Special piston assembly
High performance CDI unit
High inertia rotor assembly
Special exhaust pipe
Carbon fibre reed valve
Carburettor setting parts
Optional modified cylinder and YPVS
Full information at www.yamaha-racingparts.com
YZ125 Technical Highlights
YZ-F type 48mm front forks with separate air/oil system
YZ-F type link-type Monocross rear suspension
YZ-F type rear sprocket, rear disc guard and rear caliper
YZ 2-stroke specific suspension settings
Newly designed lean and contemporary bodywork
New graphics with harmonized YZ logo and ‘Speed Block’
YZ-F type handlebar mounted clutch adjuster
YZ-F type wide footrests
Latest pattern Dunlop tyres
125cc liquid cooled 2-stroke engine
YPVS (Yamaha Power Valve System)
Close ratio 6-speed transmission
38mm carburettor with good throttle response
Semi-double cradle aluminium frame
Special YRRD kit parts availableGet MoreBikes delivered through your letterbox every month. 12 issues for £15. Click here for more information.