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Gearbox whine and clutch rattle

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royhall:
Thanks for that. The oil that came out of it was jet black so I ran it through a filter paper to check for glitter, found nothing in the oil or the oil filter. When I pull in the clutch lever the clutch noise stops almost completely and no other noises from the engine are apparant (not even cam chain strangely). Was a whole lot more concerned about that gearbox whine. Your correct about me being new to Honda's, have spent all my time with Kawasaki Zeds, and they are the quietest clutches ever made so it was a bit of a shock. How loud should the transmission noise be? Thanks for your help.

steff750:
 ;) clutch rattle is normal on Hondas if it goes when the clutch is disengaged, then it only needs the carbs balanced even then it may not go away completely
Honda gearboxs are very notchy and you need to be real postitive with gear changes( id say Suzuki best gearboxs on the planet) but unless the whine is really bad I would run it a while longer to get used to its quirks are you sure its gearbox and not wheel bearings id say its final drive bearings if anything, you will need to check it out to be on the safe side gearbox seizure is not nice :o

royhall:
Yeah fairly sure its gearbox, its not a really noisy whine just kinda there if you know what I mean. Nothing seamed amiss with the cycle parts when I went through it all. Have had both wheels off the ground and done a fair bit of pushing and pulling looking for worn bearings/bushes. Only thing appearing loose were the head bearings and I have sorted that. Will check out your suggestion though just to make double sure. Carbs are carefully balanced, took ages over it and got it almost bob on. Didn't change the clutch noise at all. Clutch noise does calm down some when its hot. Think I will pull it next weekend just to make sure, talking to the previous owner he didn't fill me with confidence about his knowledge or abilities. Thanks all.

Trigger:
If the bike has been sitting about for years you can get rust on the bearings because of no oil running. This can give a bad sound. Change the oil for the first 500 miles just to flush out anything that should not be in there.  As everyone has said, run it for a while to see what happens. I always fit a magnetic plug to all the CB engines i do. If it gives a big clunk as you put it into gear. That is also normal on these old girls.

royhall:
Okay thanks for all the replies. Will check clutch this weekend then give it a run for a few months. See if anything happens. Many thanks.

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