Valve adjustments - What was your first readings ?

silver · Post by **silver** » Fri Jul 11, 2008 3:02 pm

I'm just in from measuring the valve clearance on the YZF. I hope it's done breaking in ! The exhaust is supposed to be between .20 ~ .30 mm. It's averaging .17mm. Mighty tighty.

dragracer1951 · Post by **dragracer1951** » Sat Jul 12, 2008 10:23 am

Meh....
that would be .0067. Now....I'll bet you can't tell the difference between that nad .007.
But on the other hand, I like to run them on the loose side. They seem to make a bit more power there. You can calculate the ammount of cam retard you can get by opening up the clearance a bit. Look at the relation of the base circle na dthe cam lift. It's a cosine thing.

sickle44 · Post by **sickle44** » Sat Jul 12, 2008 10:54 am

How much looser past or around factory recommended clearances is loose enough btw Jim?

silver · Post by **silver** » Sun Jul 13, 2008 6:09 am

I was going for the "middle of the road" so to speak. Around .25mm.

dragracer1951 · Post by **dragracer1951** » Mon Jul 14, 2008 1:17 pm

Bout a thou or a thou and a half