03 k12 gt clutch splines sheared off - K-Bikes.com - Excellence in Motion
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post #1 of 4 (permalink) Old Apr 4th, 2020, 7:23 am Thread Starter
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Location: spring hill, fla, usa
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Unhappy 03 k12 gt clutch splines sheared off

o3 k12 gt - clutch splines in disk sheared off. looks like NO grease on trans shaft EVER.
soi need to replace gear box & clutch disk.
NEED TO BUY USED - TRANS WHAT SHOULD I LOOK OUT FOR.
numbers on trans ? ( higher #'s - better trans ?)
is a TRW the best disk ? (oil resistant)
ANY HELP AS IM LOOKING FOR PARTS ?
THX FOLKS
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post #2 of 4 (permalink) Old Apr 4th, 2020, 9:45 am
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Location: Burton, British Columbia, Canada
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Almost happened to me the shear off,rattle was excessive and so was the backlash. And sticky downshifting shortly after a spline lube/inspection?

Clutch disk only?

If your metal plates are dished in,that is most probably why the friction disk dug into the transmission splines.DO NOT replace only the friction disk if you want a long lasting repair.

Complete new Sachs clutch pack on fleabay and gently used fleabay transmission? Total cost was ~$1000.CAD /3yrs ago.New clutch is now at just over 100,000kms.

New clutch then but I didn't even touch the Viton Oring or main seal.Main seal is at 250,000 kms and the Oring at 160,000.No leaks....none expected and in my case no need for an oil proof disk!
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post #3 of 4 (permalink) Old Apr 4th, 2020, 2:42 pm
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Yes, for sure check your pressure plate for flatness, no more than a couple thou out. Change the Oring with a viton one and leave the main seal. Do all the other stuff folks talk about while in there too.

Mount Vernon, WA.
tire guy, I'll mount your tires.
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post #4 of 4 (permalink) Old Apr 8th, 2020, 6:36 pm Thread Starter
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thanks folks.
NO grease on shaft or clutch splines - dry as a bone. wore trans shaft splines - till it jumped. (replaced clutch disk - by POwner)
& sheared the rest.
rest of assy all ok.
got a sbs clutch - (6mm) for $120 new - from the UK.
this time ALL splines get lubed with moly paste - hand rubbed in - then a thin film.
ill do the drive shaft splines too - all dry - never serviced.
thank god the exhaust nuts came off. swing arm bearings all good & rear diff.
thx for the input. keep them flying bricks running
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