Tappet clearance

[tvrla]

While helping a friend adjust his valves, he pulled out the small owners manual which listed clearance at .002" and .008".

I'd never seen that before and as far as I knew, all beemers were set at .004 and .008. We set them at .004, but now I'm wondering.

I've done a little searching and can't find anywhere else that lists the intakes at .002".

What's going on here? Any of you have more data?

[Bob_Roller]

That was the recommended clearance value from BMW back when the bikes first came out .

I think  most owners set the intake to .004 in these days .

[Barry]

BMW recommended valve clearance changed a few times when the bikes were new. This is the history as far as I have seen in print. The service bulletin superseded the original owners manual when clearances were found to be closing up.

78 - 80 owners manual   inlet .004"    Ex .006"

81 -      owners manual   inlet  .002"    Ex .008"

Mar 82 Service bulletin   inlet .004"    Ex .008"

[tvrla]

Thanks! That's exactly what I needed.