June 6, 200818 yr Bata rev 3 a 2003 250 has a whine from what seems to be the clutch, not sure if i am truthfull. It seems to get a little quieter as it gets warm, WHAT IS IT! causing this whining sound. All the gears work fine and the clutch is fine(once initialy cleared from stone cold) if just a little heavier than my sherco. Help. it is niggling me. Edited June 6, 200818 yr by ythan
June 18, 200818 yr Author Well my findings! As for the clutch drag from cold i changed the oil to Castrol Dexron Mercon III Atf, this as Improved the clutch and the whiring noise is a lot quieter. I took notice of a few betas at trials and it is now about the same as others, Good stuff that ATF if you have issues as the above post, i would do as i did it was a shock just how much it changed things for this bike.
June 18, 200818 yr The whining of a Beta is usually the primary drive gears - the gears that transmit the power from the crankshaft to the clutch basket. Betas and a few other bikes make that noise because the primary drive gear teeth are straight cut and this is a good thing as it prevents side loading of the crankshaft and clutch bearings and reduces the overall power lost through the gearbox. Many people like the noise and even seek it out.
June 24, 200818 yr I have recently replaced the main bearings, and now all you can hear is the whine. I think it sounds cool!
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