The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Boxer_Bolshie on April 01, 2012, 08:58:14 PM

Title: HELP on cylinder (Jug) orientation!
Post by: Boxer_Bolshie on April 01, 2012, 08:58:14 PM

HELP!

Mkay I just did a boner move and got the cylinders mized up and now I don't know which goes on what side of the engine case?

One cylinder has the numbers "82 ZN4W4" while the other has "82 ZN4W3" but this cylinder also has a "D..." while the other does not.

Title: Re: HELP on cylinder (Jug) orientation!
Post by: Air4Life on April 01, 2012, 09:22:40 PM

On aircraft odd ending is left side and even right side.  VW's same way from what I remember.  Sorry can't give you assurances.  I take it you've tried the regularly touted websites?

Title: Re: HELP on cylinder (Jug) orientation!
Post by: Bob_Roller on April 01, 2012, 09:41:37 PM

I just checked my R65's, the '81 left cylinder ends with an odd number, the right ends with an even number .

The'82 and '84 LS's, both cylinders on both bikes the number ends with an even number .

Sorry I couldn't be more help !!!!

Title: Re: HELP on cylinder (Jug) orientation!
Post by: tvrla on April 01, 2012, 10:38:50 PM

The important thing is to keep the pistons mated to the cylinders, otherwise it really doesn't matter which side - they're interchangeable. Identical.

Title: Re: HELP on cylinder (Jug) orientation!
Post by: Boxer_Bolshie on April 02, 2012, 02:10:08 AM

Thanks all!  Just to quadruple check, when we say left side of the bike it's the left side as we are off the bike and facing it with the rear tire in front of us as apposed to cars where it's from the driver's perspective... am I right?

Title: Re: HELP on cylinder (Jug) orientation!
Post by: tvrla on April 02, 2012, 04:01:14 AM

It's the same on bikes - from the rider's perspective sitting at the controls.