Installed this kit along with the Tbolt cam and spring kit on a 2019 Vader. All the parts were very nicely made and arrived in perfect condition. With a bigger carb and exhaust It provides big power increases throughout the RPM range and in the case ... Read Full Review
I put this kit, along with the YX140 cam and valve springs on a 2019 Vader 125. With a bigger carb and custom exhaust the Vader is much stronger form the low end right up to a surge of power and torque in the upper rev range. All the parts are qualit... Read Full Review
This kit works perfectly for a 2018 Vader/Boom/Boadiao 125CC. I paired this kit with the race cam for big valve heads and a Mikuni VM 26 carburetor. Prior to installation, I could barely reach 50mph. I have about 100 miles on break in so far and I wa... Read Full Review
When I decided to freshen up my semi-auto Lifan "125" (actually 120cc despite what the jug says) Vince talked me into using this kit instead and also told me to try this cam (WHS-1638 w/sprocket and valve springs), telling me "you'll be happy". I alr... Read Full Review