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Q: Size Of Valve For 57mm Piston Of X1

Ryelle61

Super Veteran
i'm sure sa mga IDOLS and MASTERS lang talaga ako neto makakapagtanong. kaya ayun. gumawa na ako ng thread. ROFL! 57mm ako pero stock valve. help help help
 

blackfly26

New Member
Up for this question, if i may add, how about the camshaft what stage would be best?
i've seen a BV cylinder head 27mm/23mm stock CH of Yamaha X1 just modified by LHK, i think...
 

Ryelle61

Super Veteran
i think 22/26 will do just fine too. just a guess. stage 2 camshaft is good. im will soon look for UMA stage 2 camshaft.
 

blackfly26

New Member
I read a post from the other barrio, according to him that BV is best suited for 59mm & above bore size, below 59mm bore, stock head with long duration cams is good to go.
*long duration is the degree of the cams??? anyone can enlighten me please. thanks
 
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