Yamaha 112 stroker kit. Doesnt come with all gaskets, crank bearings and instructions suck. The jetting / carburetor recommendations are way off. Parts are good quality but if you are not good at tuning 2 strokes... have someone that does know how to tune do it. Athena needs to rename this kit to half kit because its not a full kit of everything you need.
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This kit was pretty straight forward to install. This kit states no machining necessary but you will need to shave the case in order to clear the piston. Also it states all gaskets are included for the job, that not accurate, it comes with head and cylinder gaskets only.
Took the bike out for the first time yesterday and it is a rocket. It makes allot more bottom end and the power band is incredible. Used Athena's recommendation for the jetting and it was pretty close just need a little fine tuning.
I would recommend this for advanced riders; the yz is fast out of the box and even faster with this mod
Time will tell on durability.