I have a 1972 XS2. I have two different valve clearance specs. Clyer says cold Intake .002 to .004 cold Exhaust .006 to .008 Haynes says Inlet .006 Exhaust .012. I've looked at other sources and I believe Clyer is correct. Anyone know for sure?
My Clymer manual says, like yours, intake .002-.004, exhaust .006-.008 inches. But then in the back of the book under "Performance Modifications" it says Intake .006, exhaust .012. Grizld 1 can you clear this up for us? This is just my less than professional back ground speaking, but, if you have a little play and it's not ticking too bad then you're in the ballpark. [lets see what kind of response this gets] Skimmer
The early engines (series 256) used a different cam from later units, and recommended valve lash was wider. There may have been later service bulletins with different recommendations, but the XS2 owners manual (available at www.biker.net ) specifies .006" intake and .008" exhaust. As far as ticking is concerned, you're better off hearing your valves than smelling them.
Last Edit: Feb 17, 2010 13:05:38 GMT -5 by grizld1