The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: tvrla on April 02, 2011, 11:17:46 AM

Title: Tappet clearance
Post by: tvrla on April 02, 2011, 11:17:46 AM

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?

Title: Re: Tappet clearance
Post by: Bob_Roller on April 02, 2011, 11:36:55 AM

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 .

Title: Re: Tappet clearance
Post by: Barry on April 02, 2011, 02:32:35 PM

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 The service bulletin superseded the original owners manual when clearances were found to be closing up.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"

Title: Re: Tappet clearance
Post by: tvrla on April 04, 2011, 09:33:52 PM

Thanks! That's exactly what I needed.