aaronxs400
XS400 Enthusiast
After hours of research last night. Here is what I have come up with for bore options on the XS400.
If I was to build this I would use either a 78 or 79mm raptor 250 piston, ream out the small end of the rod to 17mm and use the raptor 250 wrist pin as well. These pistons can be purchased with up to 13.5:1 compression.
If I was to build this I would use either a 78 or 79mm raptor 250 piston, ream out the small end of the rod to 17mm and use the raptor 250 wrist pin as well. These pistons can be purchased with up to 13.5:1 compression.