Are r 65 cylinders the same

[thessler]

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

[tvrla]

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.

[Barry]

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

[thessler]

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

  Tom