Whizzer belts
Hi, I have had my Whizzer belts run wet with no perceptible slippage as have others I have worked on.
The Whizzer belt adjustments have been covered here in this forum, should be able to search them out, I have posted my method, and so has Quenton. Neither of us use any dressings or special treatments.
It is important to figure out which belt is slipping, this is relatively easy to do running on the stand, either by applying rear brake while running, or holding the brake to see which one slips first. If the belts are real loose, you can just put bike on stand, not running, and turn the rear wheel and watch for the slippage.
If the rear belt is loose, the engine or rear wheel must be moved, if the front belt is loose, the engine is moved in a different manner. Often the front belt will be worn, or stretched and will require either adjustment or replacement, the original belts typically do not last very long, my '05 only lasted 50 miles before I replaced it.
Ask again when you know which belt slips, and you are ready to adjust.
Mike