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No gears?

  • Thread starter Thread starter TitanNeil
  • Start date Start date
T

TitanNeil

Guest
Long story....

I bought my GS1100GK as a non-runner, with a driveline issue. I heard the bike run 2? years ago, and listened to the rasping gear-not-meshing noise when he let out the clutch in any gear (with the bike not moving at all). I bought the bike cheap, and took apart the bevel gears to find that the bearings had collapsed and they were not engaging any more. I cleaned all the metal shavings, bearing bits and bearing cage bits out of that part of the engine case and popped in another set of bevel gears. I had removed the shaft drive swingarm to get the rear bevel out and it all went back together fine. The clutch had been removed by a mechanic to help diagnose the driveline issue, so I put it back together and installed it.

The problem? I spin the back wheel and it almost seems like it isn't hooked up to the transmission. The shaft is turning because I can feel it through the large rubber boot at the swingarm pivot point, I can shift up and down and hear the clack of shifting gears (with no oil yet in the tranny) but as far as the rear wheel is concerned, its in neutral all the time. Just spins and spins. Did I screw up? No leftover bits, everything seems correct - but the driveline doesn't seem to connect.
I just put the rebuilt carbs on and have some wiring to do before I could start the bike and shift through the gears with it running. Any ideas?
 
What did the replacment gears come from ? 850 gears will not work, I think 1000 will work not sure. If you used 850 gears you will have the problem you have.. Easy way to tell The flange on the shifter side is thicker on the 1000
 
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Now you need to replace the splines that go into the rear wheel hub.
 
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I'm pretty sure the bevel gear set was from an 1100 motor. I recall comparing the new to the old, but it sure feels like this is the problem. When I spin the rear wheel is seems like the movement stops at the bevel gear box, as the shaft turns but the transmission gears don't.
I bought the bearing set to put on the old bevels, but the gears were a bit chewed so I just replaced the entire set. I have the original chewed (but probably usable) set with new bearings sitting here. I hate to have to do this job again!

I replaced he splines on the rear wheel, btw.
 
Remove the shifter cover and compare the beveled gear that fits into the side of the engine their is a noticable difference in the part that sticks out from the engine. It is much thicker
 
O.k, I removed the cover and am looking at the end seal on the gear. I threw out the original since it was damaged from the spun bearings. I have nothing to compare it to!
I think i'll have to go out to the wreckers and have a look at the donor engine I took the gears from and see what it is. I THOUGHT it was a GS1100G, but I might be wrong. Did any of the other GS's have the blacked-out engine?

I really would like to just change the side gear, not the one on the shaft...:o
 
Solved!

Solved!

Well, it only took a couple of months of fooling around until I called in a friend to help with my GS driveline dilemma. I could not figure out why the replacement bevel gears did not seem to connect, and therefore connect the transmission to the driveshaft. My friend took about 10 minutes to figure it out. Well! As it turns out, there is a major design change that isn't obvious at first glance with this bike - and I don't know whether it has to do with it being a GK model as compared to a plain GZ model. The output shaft that holds the bevel gears is WAY shorter, and the gear itself has the spline inset on the wrong end of the gear. Basically, when I put a different (but similar looking) gear on, they mate up, but the spline is too far away to lock onto the gear so it just spins on the shaft. Not obvious until it is all buttoned up and there is no drive. Take it apart, it looks fine. Stumped me for quite some time! (I'm not a mechanic though, I never look for the obvious problem...)
Sooo, anyone knopw why these are different? I had a GS1100 parts engine (black), and a 1982 GS1100GZ parts bike (siver engine), but only my 1983 GS1100GK has this odd ouput shaft/gear difference. Bugger!

Now the this is figured out, I can proceed to build this into the tourer I want for next season. My 1974 BMW R90/6 is now up for sale!
 
Some one may have painted the engine BUT that is what would happen if you used the 850 gear set. They should be replaced as a set!!! ALL of the 1100G should be the same, No design changes..
 
Engine serial #

Engine serial #

Just wondering if someone stuffed an 850 engine case on there in the past. Serial number on the bottom end starts with U701-1150XX, anyone know if this would be an 850 or 1100 bottom end?
 
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