The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: AlfromNH on September 30, 2013, 09:18:16 PM
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I'm wondering if anyone knows for a fact if this will work, a '84 seat on a '79 R65. I know the cowl is different as well as the trays, so I'd need those items to match the seat.
I look at the parts fiche, and there is a different rear subframe before and after 9/80.
Anyone tried this?
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I'm wondering if anyone knows for a fact if this will work, a '84 seat on a '79 R65. I know the cowl is different as well as the trays, so I'd need those items to match the seat.
Anyone tried this?
I'll let you know next Monday. wife's R65 has a fairly industrial single seat arrangement using a seat and rack from an R80GS. recently she had a significant amount of foam removed from the seat and I can no longer ride it comfortably. This weekend I'm taking her bike for a run and I am going to try and put my 1985 (but still twin shock) R65 seat on it for the occasion. I'll let you know whether the hinges line up of whether I had to take the hinges off and secure with bungee cord.
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Thanks for that. I look forward to hearing the results of your experiment. :)
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I *think* that the dimensions will work with either seat - I don't know this for certain, but I will also try to look up some details in my Boxer Bible..
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I bought an extra seat off ebay to work on. Some of my hinges are in the process of falling off and I wanted a spare to work on before I ripped mine up to fix it. I have a 79 and the seat I got was from a 83' I think. It fits almost perfectly. The tool tray from the 79' can get in the way a tad, but the hinges line up just fine.
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The only real difference in the subframes of gen 1 and gen 2 is that the early ones were fastened at the top-front with a standard nut/bolt.
The later ones had a tapered allen-head screw going out from the inside (where the subframe also had tapered receiving holes) and held with nuts on the outside of the frame.
AFAIK - there were never two different lengths to the subframes discussed.
One of the biggest advantages to the later method (that I could see) was that it made removing the battery MUCH less dramatic.
As disco mentioned - the front tool tray will not work with the later seat.
You will need a tray from a 2nd gen.
(https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fwww.pbase.com%2Ftomfarr%2Fimage%2F132484647%2Fmedium.jpg&hash=500dc5e3fd8322ec8e7c9ae692a0d23e6d8fe8bf)
'79-'80 on left
'81-'84 on right
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I bought an extra seat off ebay to work on. Some of my hinges are in the process of falling off and I wanted a spare to work on before I ripped mine up to fix it. I have a 79 and the seat I got was from a 83' I think. It fits almost perfectly. The tool tray from the 79' can get in the way a tad, but the hinges line up just fine.
Great, thanks. Since I am missing the seat, cowl, and both tool trays I'll find all from the same generation.
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I bought an extra seat off ebay to work on. Some of my hinges are in the process of falling off and I wanted a spare to work on before I ripped mine up to fix it. I have a 79 and the seat I got was from a 83' I think. It fits almost perfectly. The tool tray from the 79' can get in the way a tad, but the hinges line up just fine.
Great, thanks. Since I am missing the seat, cowl, and both tool trays I'll find all from the same generation.
And I highly recommend the later, if only for the rear storage compartment.
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Seems like with the later version you gain space in the cowl tray, but lose space in the tool tray. :-/
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But the tool tray will still handily hold the OEM tool kit, or one similar, plus a couple of shop rags, etc.
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I like using the rear storage area for things like a spare inner tube (get the one sized for the front tire and it will also work for the back tire), and other bulky and soft things which I don't want wrenches or screwdriver tips or other pointy metal tooltips poking or rubbing through that I store in the front tooltray.
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I regret that I am unable to report whether my 1985 twin shock seat will fit on my wife's 79.
When she had the GS single seat fitted she had ironmongery added to the subframe to mount a luggage rack from an R80 as well. I have never looked closely at it and assumed it was bolted on and that I could remove it to put my seat on and ride her bike.
Sadly, it is welded to the subframe. as a future rainy day project I intend to grind off the welds and institute a bolt arragement, but in the short term I can't say more than it looks like it will fit and I *think* the hinges will line up.
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I regret that I am unable to report whether my 1985 twin shock seat will fit on my wife's 79.
Thanks for the effort regardless. I think I have a line on an '83 seat and cowl for a good price, I'll probably get it and hope for success
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I regret that I am unable to report whether my 1985 twin shock seat will fit on my wife's 79.
Thanks for the effort regardless. I think I have a line on an '83 seat and cowl for a good price, I'll probably get it and hope for success
I predict a 87% chance of success.
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I like those odds! ;)
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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:
(https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fwww.realoem.com%2Fbmw%2Fdiagrams%2Fz%2Fz%2F7.png&hash=9c483078ad06013444509e785f0fd6411d0a810e)
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:
(https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fwww.realoem.com%2Fbmw%2Fdiagrams%2Fz%2Fz%2F8.png&hash=6af456b245951f0421d3d0feb63cac0ca40ba658)
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!
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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.
(https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fi1350.photobucket.com%2Falbums%2Fp763%2Facarey3%2FIMG_20131102_105300_800_zps75ec3434.jpg&hash=9518a199eff0235007aed2a29326b8d367fb649e) (http://s1350.photobucket.com/user/acarey3/media/IMG_20131102_105300_800_zps75ec3434.jpg.html)
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.
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... 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.
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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
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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.