*If you install with stock bore and stock piston, you can't use it because piston and crank circumference collide with each other.You may need to widen the bore or use a short skirted piston. *If you use the 500 crank case, you need to modify the crank case for this 148.8 circumference crank case. *This is not a product that can be installed without modification.
The stroke of SR400 is extended from 67.2mm to 92mm. The crank weight circumference is 148.8mm, the same as the early XT500 and SR500 models.
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.
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