2004 CR250 problem fixes

[stroker]

hey Marcus, yoou had mentioned cutting 1.25 mm off the cylinder to pick up some bottom end, will this require race gas?

 

[marcusgunby]

Sorry guys i should have said , the head would need modding to suit this lower deck height, with the crs they tend to detonate on fairly low compressions, so i would run the best fuel you can afford.