YY250T cold valve adjustment By chinascoot (Read 274 times)

[chinascoot]

Whats happening fellow scooter brethren?

So I'm getting ready to do a complete top end rebuild on a Jonway YY250T Honda clone engine.  It has the funky valve adjusters things on the outside of the valve cover.  This is my first 250 and first time I have encountered this.  I'm fully versed in the 157QMJ and 139QMB engines but clueless on this one.  At this point, I would consider myself at the very least on the cusp of being a gy6 expert.  But now I have brought shame to my family, I'm like a baby with this engine.

So I've rebuilt several gy6 top ends, I'm guessing this isnt much different.  My question is after the top end rebuild how do I adjust the valves cold?  Everything online, including a vid posted here points to doing it warm.  I apologize if the question has been answered.  Your help is always greatley appreciated.

Thanks,

CS

[cyborg]

Most set it in the middle run it till it gets warm and move them till they get quiet

[crwford]

I have done it warm and cold never found a difference either way.