Valve clearance discrepancies

[81xsproject]

Okay, I was checking out my clearances and looking at the french tables that John refered me to here .

The problem is that the clymer says
intake: 0.16-0.20mm and exhaust: 0.21-.024mm

and the table says
intake: 0.11-0.15mm and exhaust: 0.21-0.25mm

Which source is correct???

[Incubus]

What year is your top end? Both valve gaps are correct, depending on the year of your bike. The earlier XSes had the wider intake setting.

Patrick

[81xsproject]

Stupid clymers has one blanket set of clearances. So the wider gaps are for the 70's heads?

[Incubus]

Yeah, '78 and '79, I believe. The valves were different on the earlier bikes than o te later ones. Since your signature indicates you have an '81, and I assume you have the stock top end, go with the tighter settings.

Patrick

[Ken Talbot]

In the 80-81 supplement section of my Clymer's, it reads "Intake valve clearance has been decreased from the 1979 specification of 0.16-0.20mm to 0.11-0.15mm. This cuts down on engine noise, but is recommended only on 1980 and later models".