Final drive alighment
TrapperAH1G:
Need some input. Doing a service on my grandson's bike, 98 Standard. Guess I've been spoiled by mine because it never seemed really difficult before. Started reassembly this morning and spent hours trying to get the shaft to mate with U joint. Could see the u joint was at bottom of swingarm and kept trying to center the coupling and work the shaft in.....no luck. Then I used a small wood dowel to reach in and raise the coupling, while sliding a piece of flat 1" aluminum trim under it. Pulled the dowel out and inserted just the shaft.....slid in perfectly! Removed the flat trim piece and then installed the drum onto the driveshaft. All fit together nicely, hand tightened four bolts.
Then got to thinking: "Is the final drive truly all the way on the drive shaft? Is the oil seal seated correctly?" No way to tell without taking it apart, but wanted your thoughts.
Thanks
98valk:
tighten axle first, 4 bolts are the last thing u tighten/torque
TrapperAH1G:
Thanks. Got that firmly fixed in my head!
What I did was install the driveshaft into the u joint, then installed the pumpkin on the driveshaft. It appeared to mate up and seat as it should, but I'm not sure.
In the morning, I'm going to pull the pumpkin again, see if the driveshaft is seated. If so, think I'll do the install several times to ensure the shaft seats in the pumpkin as it should.....or doesn't.
Will report back tomorrow.
Pluggy:
Quote from: TrapperAH1G on August 28, 2025, 05:37:49 PM
Could see the u joint was at bottom of swingarm and kept trying to center the coupling and work the shaft in.....no luck.
Thanks
Had the same early experience. Looking in with a small flashlight, the U-joint was positioned so the driveshaft would not mate. The service manuals only show those items mating easily. In the garage, I found an inch diameter wooden dowel and carved one end into a cone. With the transmission in neutral, I turned the U-joint with the dowel. It positioned the splines so the driveshaft slid right in.
My latest version of this is made from an old barbeque tool. It retains the wooden handle from its BBQ days.
Chrisj CMA:
Quote from: TrapperAH1G on August 28, 2025, 09:47:50 PM
Thanks. Got that firmly fixed in my head!
What I did was install the driveshaft into the u joint, then installed the pumpkin on the driveshaft. It appeared to mate up and seat as it should, but I'm not sure.
In the morning, I'm going to pull the pumpkin again, see if the driveshaft is seated. If so, think I'll do the install several times to ensure the shaft seats in the pumpkin as it should.....or doesn't.
Will report back tomorrow.
Insert the drive shaft into the pinion cup. Pullback gently to insure the snap ring is engaged. Then with the swing arm level sit directly behind the opening of the swingarm and guide the drive shaft down the tube. When it stops if it’s not in all the way, give a few good healthy shakes up and down while applying gentle force into the swingarm and it will pop right in.
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