SOURCE: whinning noise in the primary
With the engine running, put the transmission into gear and sit there with the clutch lever pulled in. Do you still hear the noise. If so, most likely the noise is in the primary itself rather than the transmission. Since you didn't specify whether the bike is a Sportster or a BIg Twin, it's difficult to say what the noise may be. It could be a bearing going bad. The problem with that is that you can disassemble the bike and never find the bearing. It could be the big bearing in the outer clutch shell or it could the mainshaft support bearing in the inner primary if it's a big twin. A Sportster has basically the same bearings but in different areas. If the bike is equipped with one of those automatic primary chain tensioners, I've seen them make a noise as well. Then again, a noise like that is very difficult to find. It seems to travel all through the engine. It could possibly be an inner cam bearing going bad. They sound exactly like the alternator whine on a Chevrolet. If you have one of those mechanic's stethoscopes or long screwdriver, listen to various places on your engine to try to locate the noise more closely.
Good Luck
steve
Testimonial: "Thanks for the advice..I'm hoping it is just the outer clutch bearing"
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