Put one on a 2001 XR70, its the perfect blend of power and fun for a kid. The bike has had stock 70cc, 88cc big bore(no felt difference from 70cc), 88cc with head/cam v2 (big step up but was blowing through stock semi auto clutch), yx160 (way too muc... Read Full Review
I bought this engine along with a jetting kit fir my sons crf50 it fired immediately and has so much power, it seriously hauls now, highly recommend this engine.... Read Full Review
This little this is pretty wicked. Not only does it rip me around but I've had some of my friends get on it that are over 300# and it hauls still. Put some good oil in it and get that nasty green Chinese transfer oil out. I put a fmf full exhaust alo... Read Full Review
I've already written one review for this engine. After a couple of months I'm still happy! Works great in my cub! If you go for this mod, keep in mind that you'll need to put a lower numeric gear on the rear or otherwise first will pretty much be a g... Read Full Review
Nice engine! Good quality for price. Fit in my 1964 Super Cub with minimal frame mods. Old rocker shifter even fits! The intake is skewed slightly to left, so carb will fit in underbone frame, no need to turn it around backwards (though you can if yo... Read Full Review
[5 of 5 Stars!] 
