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leaking shaft boot gs1000

  • Thread starter Thread starter charlesandhisbeard
  • Start date Start date
C

charlesandhisbeard

Guest
Hi,
my 81 gs1000 is leaking engine oil (i think so, as it smells like engine oil) from the shaft boot. its a slow drip, only about a few ml a day. could it be a corroded rubber boot? or faulty o rings or something to the transmission?20161105_104500.jpg here is a photo from the drivers left hand side. you can see the oil drip is only a small droplet hanging off the end of the rubber. but its managed to make a nice little pool underneath over a few weeks.
thanks
 
berst.jpghere is a photo from the drivers right hand side.
 
here is another photo from the drivers right hand side, pretty much the same photo as last. you can see the drips only small, but the boots covered in shiny oil. i should add that the drive shaft has never been serviced by me or the guy show had it before me and the bikes done 70,000 kms, but runs very well. i cant really tell if the leak is coming from the rear or front end of the boot. in the photos it kind of looks like the rear. but im pretty sure its engine oil not gear oil. as its engine oil colour and smells like it. but perhaps the last owner just put engine oil in the driveshaft. il check the driveshaft oil level soon.
 

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could it be a corroded rubber boot?
Click to expand...
The boot is to keep dirt out, not oil in. and yes it's motor oil. The gearbox shares it with the engine.

Why haven't you undone the boot and looked?
 
Gorminrider said:
The boot is to keep dirt out, not oil in. and yes it's motor oil. The gearbox shares it with the engine.

Why haven't you undone the boot and looked?
Click to expand...

Actually it should be gear oil. The engine/transmission and secondary gear area are separated by oil seals so no engine oil should be mixed with the secondary gear oil. If there's engine oil in the secondary area then you have more then one seal leaking.
 
Or whoever was in there before this guy got the bike used the wrong oil at some point. Dont think it would be a "serious" issue as the gears were still getting lubricated. But in a perfect world there should be gear oil in the secondary.
 
Gorminrider said:
The boot is to keep dirt out, not oil in. and yes it's motor oil. The gearbox shares it with the engine.

Why haven't you undone the boot and looked?
Click to expand...
i.will.get.around.to.it.at.some.point.ive.still.got.an.ignition.system.on.my.750.to.fix.first.as.its.a.more.pressing.problem.also.why.is.my.spacebar.not.working!
 
I have the same problem. My boot is leaking a coffee color oil. Changed the gear oil about 3 times and still the same. I'm thinking bad seals. I might just live with it for now. Looks like a big job.
 
Its not that bad of a job. Takes a few hrs to get to the bad Oring. Worst thing is resetting the swing arm hinges..having to hold the swing arm up a bit while installing the hinge pins.
 
Just a big allen for the swing arm pivots. I didnt have one so I made one. I took an old rear brake pedal pivot and used the bench grinder to grind the splined end to fit into the socket. Glad i did this as it them took a cheater pipe to snap them loose after forever being in there. Drop the back tire, unbolt and remove the pumpkin from the swing arm, remove the pivots and slide the swing arm out the back end. Then remove the bolts holding the bevel gear to the rear of the bike. Throw a big pair of vice grips on the drive shaft and take a hammer to the vice grips and tap the assembly out.

Look at the parts fiches and order that big oring. Of course drain the gear oil first.
 
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OH...and when setting the swing arm set the pivots in but dont tighten them down...just snug them. When its all assembled and the back tire is on, youre gonna spin the back tire and listen for any rubbing from the drive shaft or the U joint inside the tube. Youll need to adjust using the pivots till nothings rubbing and each side of the tire is very close to the same distance to the inner rim of the swing arm...follow me???

Basically ensuring nothing rubbing inside the tube. The swing arm wont move much but it has some side to side play that needs to be set so things hitting.
 
Last edited:
chuck hahn said:
OH...and when setting the swing arm set the pivots in but dont tighten them down...just snug them. When its all assembled and the back tire is on, youre gonna spin the back tire and listen for any rubbing from the drive shaft or the U joint inside the tube. Youll need to adjust using the pivots till nothings rubbing and each side of the tire is very close to the same distance to the inner rim of the swing arm...follow me???

Basically ensuring nothing rubbing inside the tube. The swing arm wont move much but it has some side to side play that needs to be set so things hitting.
Click to expand...

Chuck!!!! You just cured a question I've had since I installed the 1100G engine in my 1000G. Ever since then, I've had the driveshaft, every so slightly, touching something inside the swing arm when rotating. It's all but gone now with no noticeable effects but I always wondered why it was doing it originally. Replace the engine without removing the swing arm so I didn't think that the swing arm mount was the source of the problem.
 
But when you reinstalled the engine it probably wasnt setting spot on perfectly like it was before removal...right??? Thus you readjust the swing arm so the U joints dont click..and the rear wheel just follows the axle when its tightened so there isnt anything to do back there...just tweek the pivots a bit till alls well. my previous post I said something about seeing the tires the same distance on each side of the swingarm too....scratch that as I misspoke. When the rear tires mounted its just gonna be where the spacers trap it in the swingarm and there isnt anything to adjust there.
 
Last edited:
I cant find that oring part number anywhere. Checked the diagrams in the Suzuki parts house and cant find it. Any idea what the part number would be?
 
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