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Motorcycle Forum / Country Specific / Classic (UK Group) / August 2007SOTrident 900 drive noise
My 1993 Trident 900 has done about 36,000 miles (that's right, it's not been heavily used in its 14 years...) I notice a certain amount of drivetrain noise, especially in top gear, but I'm not sure what part of the drivetrain is making this noise. It's a gentle but slightly graunchy-under-load whining sound, usually I would have thought indicative of worn gears, but wondered if it might be wheel bearings. The noise lessens if I de-clutch and coast, but it does markedly increase if I apply throttle under load. The noise is evident in 4th and 5th gear too, but less easy to make out in lower gears because the engine noise drowns other sounds out. All of this is why I'm not sure if it's wheel bearings or a worn gearbox. Any thoughts, gentlemen? (I use the term loosely :-) Ta.  SignatureAndy Clews University of Sussex *** Remove DENTURES if replying by email *** >My 1993 Trident 900 has done about 36,000 miles (that's right, it's not >been heavily used in its 14 years...) [quoted text clipped - 8 lines] >engine noise drowns other sounds out. All of this is why I'm not sure >if it's wheel bearings or a worn gearbox. chain drive, ain't they... does the 'box share the engine oil or have its own? SignatureAustin Shackles. www.ddol-las.net my opinions are just that Travel The Galaxy! Meet Fascinating Life Forms... ------------------------------------------------\ >> http://www.schlockmercenary.com/ << \ ...and Kill them. a webcartoon by Howard Tayler; I like it, maybe you will too! > chain drive, ain't they... > does the 'box share the engine oil or have its own? Shares it. SignatureAndy Clews University of Sussex *** Remove DENTURES if replying by email *** > My 1993 Trident 900 has done about 36,000 miles (that's right, it's not > been heavily used in its 14 years...) [quoted text clipped - 10 lines] > > Any thoughts, gentlemen? (I use the term loosely :-) Sprocket carrier bearing? JB > Sprocket carrier bearing? I did wonder whether it might be the gearbox sprocket. I did run it with a higher-ratio sprocket set for a few years (two extra teeth on rear sprocket I think). I wonder if the increased load might not have been so good for the 'box. SignatureAndy Clews University of Sussex *** Remove DENTURES if replying by email *** >> Sprocket carrier bearing? > [quoted text clipped - 3 lines] > teeth on rear sprocket I think). I wonder if the increased load might not > have been so good for the 'box. That's putting less load on the gearbox sprocket. You won't kill a box loke that, unless you overtighten the chain to extremes. No point guessing. Have the wheel out and check all 3 bearings. Then work your way forward form there. JB We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember A.Clews@DENTURESsussex.ac.uk saying something like: >Any thoughts, gentlemen? (I use the term loosely :-) Nylons in the gearbox. Arfur. |
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