Originally Posted by Pranav Last year I ran on a 54mm restrictor on a brand new motor, 297/260. After a full season, this winter I reduced my 2.25" pipes to 1.875" for about 18", and put in thicker gear lube, ran 304/261 on a 57mm. I'll take it. Did it nose over harder up top though? You running stock y pipe?
RM CMC Director
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