The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: KEN_W on June 10, 2012, 05:40:30 PM

Title: Piston ring orientation
Post by: KEN_W on June 10, 2012, 05:40:30 PM

 I'm fixin' to put the new rings on my pistons('81 R65), and the book says to install them facing the same direction they were before. Guess who forgot what direction they were in before? Yep, that would be me. The only one that has me stumped is the oil control ring. Both outer edges are beveled, and if there was a gun to my head, I would install it with the bevels facing up(toward the top of the cylinder). Any help would be appreciated!

Title: Re: Piston ring orientation
Post by: Bob_Roller on June 10, 2012, 06:33:52 PM

Here's a link to a BMW tech site, just so there is no misunderstanding, or anything lost in translation .

http://bmwmotorcycletech.info/pistons.htm

There's pictures near the end .

Title: Re: Piston ring orientation
Post by: KEN_W on June 10, 2012, 07:46:04 PM

Thanks again, Bob. Just what I needed.

Title: Re: Piston ring orientation
Post by: Justin B. on June 10, 2012, 08:33:00 PM

Most rings will have a dot or some other mark denoting the "top" or which side faces up.

Title: Re: Piston ring orientation
Post by: Mike V on June 10, 2012, 09:17:02 PM

Lots of pictures here of my top end to hopefully guide you in the right direction.  We have the same bike Cal...

 http://tinyurl.com/3usgefp

-Mike V.

Title: Re: Piston ring orientation
Post by: Red_Hen on June 10, 2012, 11:29:34 PM

I'm interested I knowing how these wiz engineers designed  rings to go on a special way & if not done properly bike won't run right.

Like there's so much magic in making our motors run.

Must be aliens - certainly way past my skillset!!!