What are the different valve sizes available for GY6?

[BuggyMaster]

I have been reading some information that talks about Howhit specs and Howhit is typically listed as a specifications bench mark. Has anyone actually measured valve head diameters and such and found marked differences between pieces? What sizes have you found?

[bige]

I have some I can measure

[bige]

Howhit intake valve=22.80, exhaust=27.75

hammerhead intake valve=22.75, exhaust=27.63

[bige]

those are mm

[BuggyMaster]

hmmm those are pretty close. You'd have a heck of a time figuring out which is which by sight.

[bige]

yes real close. I dont think they will fit another head and dont know if it would make any differance.