Grant demystifies the black art of Tire Changing and Repair to help you STAY on the road! "Very informative and practical." See the trailer 
Cotton or synth sweat-wicking t-shirts with the Horizons Unlimited logo on the front and a snappy slogan (changing every year) on the back.
Show your route on your panniers. Great conversation starter when you meet people on the road!
Motorcycle and travel books to inspire and inform you!
ll 5 DVDs with a custom printed slip case. "The series is 'free' because the tips and advice will save much more than you spend on buying the DVD's."
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#1
28 Apr 2010
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R80 RT 1982 - final drive problem?
Just trying to decide what things to try and fix this summer. One problem I've noticed is that at around 2-2.5 revs very small movements of the throttle often result in a nasty shlunk and thump from the rear section of the bike and an associated lurch forward as a consequence. I assume this is not meant to happen on the R80!
Is this likely to be a problem with the splines of the final drive? What other things should I look into to begin diagnosing this problem.
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#2
30 Apr 2010
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it might be the gearbox
I get a similar thing sometimes with my R80G/S, usually when I am pulling away, I think my problem is a worn shock absorber in the gearbox. I was told when it was rebuilt a couple of years ago that this was worn but the new parts were no longer available unless I had an expensive upgrade to the later type. With mine it is not a harmfull problem, just a bit of a nusance.
Your problem could also be as you suspect with the final drive, I would look at this first as it is easier to check and more harmfull if it fails.
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Hard work never killed anyone but why take the chance?
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#3
30 Apr 2010
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...or you may encounter what I did...
"Dentist needed for final drive..." Svenska BMW MC Klubben • Visa tråd - Tandläkare sökes till slutväxel Pull the bike on the central stand. Turn the rearwheel gently forward, then backwards - feel for any uneveness in motion. If ok, turn on the engine. See to that the rearwheel spinns freely off the ground. 3000rpm - go up and down through the gears; listen to the gearbox and transmission with a "stetoscope" (i.e. long screwdriver, tire iron, or what ever). If there are any bad bearing - you will hear them (sounds like rumbling at a quarry). Worn sprocket gives of a churny sound like chewing on cartilage sort of. It simply should not be the shock-absorber...
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