Yamaha DT 250 discussion forum:

compression raiser

compression raiser

Matthieu said 2015-10-07 18:49

hey all, I´m thinking of decking the cylinder or the head. not sure witch one yet, any suggestions on witch one I should plane? and has anyone here done that to this bike? I want a 9:1 comp ratio instead of that real low 6.7:1 it has!

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