My mates R1100GS has been making a bloody racket for a while, like a light grinding noise at low speed. Lots of metallic flake / sludge on the gearbox drain plug magnet, oil only changed 2 months ago. Not having the cash for a pro rebuild, we decided that I would order the bearings and seals and have a go, with the understanding that if i break it, i wont be liable for the replacement cost.
Thought it may be of use to document it here as I go, success or failure, for anyone else that finds themselves in a similar situation.
Its not the first time i've pulled a gearbox on these so progress was pretty quick to start with. Two hours yesterday saw the box out and on the bench. The FD and driveshaft all appear to be fine and smooth, and there is a definite roughness when spinning the input shaft. Splines look good, no oil on the clutch disc and a fair bit of meat still. Will give him the option of putting a new clutch in, I would at this point if it was my own, but funds will likely decide.
I couldnt get the exhaust off on my own and didn’t want to jiggle it too much on the ramp. Looked like i could get the box out with the exhaust still in place so i did.
Heated the top cover with map torch, a bit of persuasion with a rubber mallet and it pops off.
There are shims on 2 of the shafts, carefully set aside for reassembly. Hoping that I wont need to measure and reshim as same shafts are just going back in.
Had to call it a day at that, Tuesday evening ill take the internals out and see if I can find the knackered bearing. Suspect it is (at least) the rear input shaft one that's disintegrated.
Thought it may be of use to document it here as I go, success or failure, for anyone else that finds themselves in a similar situation.
Its not the first time i've pulled a gearbox on these so progress was pretty quick to start with. Two hours yesterday saw the box out and on the bench. The FD and driveshaft all appear to be fine and smooth, and there is a definite roughness when spinning the input shaft. Splines look good, no oil on the clutch disc and a fair bit of meat still. Will give him the option of putting a new clutch in, I would at this point if it was my own, but funds will likely decide.
I couldnt get the exhaust off on my own and didn’t want to jiggle it too much on the ramp. Looked like i could get the box out with the exhaust still in place so i did.
Heated the top cover with map torch, a bit of persuasion with a rubber mallet and it pops off.
There are shims on 2 of the shafts, carefully set aside for reassembly. Hoping that I wont need to measure and reshim as same shafts are just going back in.
Had to call it a day at that, Tuesday evening ill take the internals out and see if I can find the knackered bearing. Suspect it is (at least) the rear input shaft one that's disintegrated.