The Right Jetting

big like 300 .....best to do plug chops to verify here are my current setups

std bore open airbox uni filter advanced timing vitos bullseye reed cage w dual stage carbon reeds dg head pipe powercore tip 290 main 3rd needle clip

67 mm bore mild porting boyeson dual stage reeds open airbox uni filter stock head pipe powercore tip 300 main 3rd needle clip
 
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i like them.....i got the dual stage carbon fiber with there bullseye reed cage deal....sumthin diff not as cheap as ur basic dual stage but not as expensive as a rad valve either....overall i think there great for the money