'81-84 seat on '79?

[Rob Valdez 79 R65]

Make sure your new seat has the correct height rubber bumpers in the correct positions.

BMW makes at least 3 different thicknesses, as I recall - 5mm, 10mm & 16mm.  

This is the early seat:



11      Support          H=16        2      09/1980      52531232904     $2.80            
12      Bump stop      H=10        9      09/1980      52531236128      $2.80      



and the later seat:



07      Bump stop      H=10   2      09/1980      52531236128    $2.80            
08      Support          H=16   2      09/1980      52531232904      $2.80      


RealOEM is a great resource.  Bookmark it if you have not already.
http://www.realoem.com/bmw/select.do?kind=M&series=248&body=ohne&model=R65&zone=USA&prod=19820100&arch=1

Prices are estimates only.  I don't know of anyone that has actually ordered parts from the microfiche provider!

[AlfromNH]

Thought I'd close the loop on this.

I bought an '84 seat and cowl. They fit without a problem on my '79. The hinges line up and the rubber feet rest on the frame rails.

I don't have the fender installed, the rear tray mounts to the fender, correct? The fiche only has one fender PN, so I think that'll be fine.



I also got a '79 version tool tray. Since it's taller, the seat won't close, butI don't see any reason I can't cut it down to fit. This tray was a freebie, and has a big hole in the bottom that was repaired with duct tape, so I don't have a problem with "modding" it.

[montmil]

... I don't have the fender installed, the rear tray mounts to the fender, correct?

Be sure to buy or fab the simple metal strap that captures the bolts as they pass through the fender. It's about 0.375" wide x length to fit. That may be it listed as #13... maybe not. The back-up strap prevents the mounting bolts from pulling through the plastic fender.

[AlfromNH]

Be sure to buy or fab the simple metal strap that captures the bolts as they pass through the fender.

yep, got 'em for both fender mounting points.

Thanks

[Rob Valdez 79 R65]

It shouldn't be a problem mounting the box to the fender.
I don't know the details, but it should make itself obvious to you.
You may have to drill a couple of holes in the fender - I don't know.