Re: Clutch or driveshaft problem????
Yep, that is the classic slip test. High gears and hard on the throttle. If the RPM's increase faster than the bike, the the clutch is the likely culprit. There have been a few cases of drive shaft issues but they are pretty rare.
The bigger question is, what is causing it to slip? Is one of the seals leaking and contaminating the clutch with one of the three oils possible or is it simply worn out. The work is the same to repair regardless and most opt to just refresh all the seals as they go along.
If you haven't, drill the weep hole in the bottom of the bell housing and see if you get any oil out. That would be a major symptom that it is oil contamination but even with an oil contaminated clutch, you may not get any oil out there unless a seal is really badly leaking internally. Also, look for any oil around the clutch housing.
Bottom line, the only way to know for sure if you have no visual external signs of oil is to start pulling it apart.
Good luck and there are many here to help with any issues you might encounter.
Sugar Hill, GA
2001 K1200LTI – Champagne (current ride) Lazy Susan
1998 R1100RT – Never should have sold it
1974 Yamaha TX 750 Twin. Omni Phase Balanced
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