1. Will'smotobikes19

    Can I use a big bore piston/cylinder on a stock crank?

    I weighed both the stock piston with the piston pin and rings and the big bore windowed piston and they are both 3.7 oz. My question is can I use the big bore cylinder and piston without using the crank that I bought. The crank needs trued by a machine shop since I was a noob at engine building...
  2. Y

    Hello do you think this is a good deal??
  3. Anthony 4k


    What do you guys think of the pk80 I'm thinking about getting it next.