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Serious Thumper 2005 No Login
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Professional "scooter trash".
Posts: 5207
Rosemark TN
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Change your oil before you do anything else. 2 quarts Rotella 15W40 or 2 quarts Rotella 15W40... if you think the clutch is slipping, save the Rotella T6 5W40 for after any needed mechanical repairs, the stuff isn't cheap. Go for a long ride and see if clean oil made any appreciable difference. If not, see below for the next step.
If you have an inline fuel filter, delete it. I had one on the 2003, it runs 100% better with a plain fuel line than with an inline fuel filter. No matter how good it looks, a paper or sintered bronze filter element is going to lean out the bike, the bowl is not refilling fast enough to keep up with demand. You may want to try this first, hell of a lot cheaper than an oil change... and quite possibly the entire issue.
No change? Drain out roughly 1 quart of oil. Add in 1 quart of cheap Dexron Mercon automatic transmission fluid. Ride the bike just long enough around the yard for the oil to hit full operating temp, and drain it out HOT. Bike upright, use a brick under the kickstand. The stuff that comes out is going to be black and seriously smelly. Fresh oil (2 quarts) and filter, go for a ride. The atf pulled a lot of glaze and burnt on gunk off the fibers and steels (alternating clutch plates). Expect it to be a bit grabby...
If none of those do the trick, get a longer clutch pushrod and a clutch cover gasket, and prepare to get filthy. And probably frustrated, the external clutch linkage is a pain in the butt.
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