Want to add some bandwidth to your motocross career? Buy a YZ125. It not only hearkens to the days of AMA 125cc motocross and supercross championships, but it will retrain your brain as a rider, especially if you grew up on four-strokes. The main lesson the YZ125 imparts is to ride with aggression: Despite its reed-valve intake and power-valve exhaust, the 125cc engine basically is a light switch—no tooling around or short-shifting this one. Fortunately, the six-speed gearbox’s narrow ratio gaps help keep the liquid-cooled motor on the boil.
The YZ125 has an aluminum frame like its bigger YZ brothers, and the suspension is fully adjustable with a speed-sensitive fork. While the ergonomics are contemporary, the YZ125 lacks the handlebar and footpeg adjustability some bigger bikes offer. A carburetor instead of fuel injection means owning a YZ125 requires some tuning skills. Otherwise, care and feeding are easy. Best of all, though, the YZ125 weighs just 207 pounds fully fueled with premix, giving it almost a downhill mountain-bike feel compared to contemporary 250cc and 450cc MX mounts.
Likes: Lightweight, highly flickable, way fun
Dislikes: Adjustable handlebar and footpegs would help growing riders
Verdict: A great starter bike for teens and a fun second bike for vets

/cloudfront-us-east-1.images.arcpublishing.com/octane/5BSWCTPONFB3DJFRPJ34STZMR4.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/KSERUHQUTNHLBCWKXS2R3TYZHI.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/GGOH2AQRSVHY5C5JLNEVYLB5SU.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/TJJEHV3ATZFFXHUYZABHXKE2DI.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/M7L5LNQ5JZENHNBTCHEIKZKD24.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/WIC4RXQ36BAXNIW6U4UJ3XDLKI.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/G64JLSXQBJFMVPTETPM4H353EU.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/ZBMLCCOSNJBIVAEC2OU6YSONKY.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/U7PDRXGEI5DCFJGSVGNLAHGIMA.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/S553MV5QAJFOHGOKYO7TJ6NGYA.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/62WLA7IMLVF2LIPTA4DGILHZIM.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/BW6RDLNDENAVFHMPINCIIY3XCI.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/FEROGJTVONBBZKEUH46OD6R2VY.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/IFBSQJ2HCFG5JKH4GM3NB5LC3M.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/GPNWD73XDJDG7LMXDVFDZ7CL2I.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/BDI3FSQXIFAYHNC62TCPI3DV7E.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/ENYW4K4FJFAZHOWR3GQMBLRAQQ.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/4RWD4CX47ZDWNJFYIL6X55DPRQ.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/WIFNY6EQLBDV5P3HQDWXLPENH4.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/KPI4ECTRNRFRZAAIC6XGV4KKHY.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/F64VIB376RGMPHDUZ7UU4C23M4.jpg)
/cloudfront-us-east-1.images.arcpublishing.com/octane/3GB5QLTNUZD4HGF5SIFW4A2SEM.jpg)

/cloudfront-us-east-1.images.arcpublishing.com/octane/MD6XTZRDSJCM3HUCS7BNL6RCVM.jpg)