The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: thessler on February 07, 2012, 09:22:42 AM

Title: Are r 65 cylinders the same
Post by: thessler on February 07, 2012, 09:22:42 AM

Hi
I need a new piston, and the cylinder has quite a few nicks in it from the valve bouncing around in it. I may or may not be able to hone them out.

There is a set of jugs and pistons on E bay from a 79, and i'm wondering will they be a match for an 84. Guyclaims they have 26k on them, not sure about that but they look good.

I already bought a head with the wrong valves and I don't want to repeat that performance.

 Any info apreciated, Thanks Tom

Title: Re: Are r 65 cylinders the same
Post by: tvrla on February 07, 2012, 09:40:35 AM

Unless his 79 was upgraded, it'll have the cast iron cylinders. Yours has nikasils, and that's the way to go. Right around 81 a whole bunch of improvements were made to these bikes on every front - transmission, engine, brakes, suspension - you name it. One of those was nikasils.

Title: Re: Are r 65 cylinders the same
Post by: Barry on February 07, 2012, 09:52:18 AM

I recently posted a list of all the differences between the 78-80 models and the 81-84's. Should be useful for anyone new to R65's to be aware of what parts are not interchangeable.  It's only a first draft and I would still appreciate any feedback on corrections or additions.

http://www.bmwr65.org/cgi-bin/yabb2/YaBB.pl?num=1327782376/17#17

Title: Re: Are r 65 cylinders the same
Post by: thessler on February 07, 2012, 12:32:49 PM

Ok thanks guys, that was helpfull
I'll keep snooping around.

  Tom