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About shorey400

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  1. shorey400

    400 to 426 conversion, the easy way

    What is the difference with the 2s2 piston? Would this also work?
  2. Hi, this is my first post and I am sorry if this has been covered but I couldnt find it anywhere. I have a yz400f I am converting to a 426. I have a new 426 cylinder and gaskets on order and I know a 03-04 piston (5tj) piston work but I am wondering if the later model 05-09 (2s2) piston will work as I have access to a cheap je pro 13.5:1 piston. As these are both 95mm with the 18mm wrist pin same as my yz400 con rod. Does anyone know if this combination will work and differences between the 5tj piston and the 2s2 piston?