My (relatively inexperienced) wife rides a 2009 Honda Rebel with about 9k miles on it. She began to notice the bike would not go past 45-50 mph under load (wind or elevation) and it took me a while to realize it was a significant issue and take it for a ride myself. Eventually I got on it and immediately recognized the clutch slippage. We narrowed down the problem to the bike's first oil change (by me) when i used incorrect motor oil (non jaso-MA with additives).
I tried washing out the bad oil at least twice with some lighter no-additive oil and it seemed to help *a little bit*, but it was obvious that there was still a problem.
I finally got all the parts and tools from the dealer to change out the clutch plates. While taking everything apart, I noticed a few things:
- The oil change before the oil washing was very black.
- The clutch plates were very well within the specified thickness tolerance.
- The friction plates were smooth and darkened.
I used a degreaser to remove all the oil from the friction and clutch plates and then sanded a good portion of the black deposits from the friction plates using 220 sandpaper. I applied new/good jaso-ma oil to the clutch parts and put everything back together, including torquing the plate springs to the recommended 106 inch-pounds, and it's still slipping, most evidently when I apply power at 25mph in 3rd gear.
I have new clutch plates, but I'm reluctant to drop them in because I was sure the scouring of the friction plates would have resolved the issue and I can save about $100 if I return them.
Is there anything else I can try to salvage this situation? Is it a significant potential for success to just dump the current clutch plates (even though they are within recommended thickness) and go with the new ones? They dont look any less rough than the new ones.
Thanks for any wisdom you can offer.