BuckRYCA
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Posts: 258
New London, CT, USA
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My daughter and I replaced the clutch today. It was straightforward following the Clymer's manual. I did purchase an electric impact wrench as I was anticipating a problem getting the clutch nut off, but it was not necessary. To remove the clutch nut, we put the bike into second, blocked the leading edge of the rear tire with a 4"x4", applied the rear brake, and used a breaker bar (with the 32mm socket). When using a torque wrench to put the nut back in place, do the same except put the 4"x4" block on the trailing edge of the rear tire.
I've got photos, but really it was fairly simple, 2-3 hours going slowly and carefully. It's useful to pivot the rear brake out of the way instead of removing it altogether to enable clutch case removal (loosen rear nut, remove nut on front bolt, push bolt in ~ 1"" to clear the brake assembly, and pivot the assembly down).
We did soak the fiber plates for a couple of days in Shell Rotella Synthetic 5W40 (JASO MA2 certified--OK for wet clutches) and that's the oil we used for the re-fill.
We put in a Barnett kit (6 fiber plates, 5 steel plates, and four springs) for $110 on eBay (listed for $130, but with a 'Make an Offer' option). The difference is pronounced. It's all very satisfying. Now when the throttle is opened, the engine pulls -- no more clutch slippage. Hooray!
As for what we found, the both the old clutch fiber and steel plates were glazed with a brownish deposit that may come off with work and nasty solvents, but we didn't bother. I suspect the previous owners did not adjust the clutch properly and/or used energy-conserving oil.
The stock clutch pushrod (45.4mm) caused the actuator arm to be within, but on the high side, of the two case markings. The 1mm longer pushrod resulted in a more centered actuator arm position, so we that's the one we used.
Here's how the old plates measured: Clutch fiber plate #1 (1 of these) 0.136" Wear Limit 0.103"
Clutch fiber plate #2 (5 of these) ~0.116" each Wear Limit 0.124"
So, according to the Clymer's Wear Limit all five of the #2 fiber plates were shot.
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