kwackerzak Posted April 12, 2009 Report Share Posted April 12, 2009 I recently bought a 2008 beta 250 and im concerned about a noise coming from the engine, sounds like a ssshhhh kind of noise that gets louder as I rev the engine. I asked a few people at a trial today and a couple of them said it sounds like the mains are on the way out and others said theres nothing to worry about. I have taken the flywheel cover off and there is no play on the flywheel but when I rock it back and forth there is a slight rattle coming from behind it, is this normal? Can anybody shed any light on this before I have it stripped down. Quote Link to comment Share on other sites More sharing options...
peterb Posted April 12, 2009 Report Share Posted April 12, 2009 Hi kwackerzack, Could well be the main bearings have worn - at this stage in the bikes life it would be very likely due to having had the bike drowned in a stream at some stage and not cleaned out the water properly or soon enough. Then again, hard to tell without listening to it, ask a learned friend. As for your rear brake, you would be ok to use hot water from a kettle poured over the lever before bending back into shape, the aluminium work hardens very quickly so you may need boiling water 2-3 times when bending. Bye, PeterB. Quote Link to comment Share on other sites More sharing options...
kwackerzak Posted April 13, 2009 Author Report Share Posted April 13, 2009 Cheers Peter. I have just noticed that the gearbox oil is white when looking through the little glass on the casing, I suspect that this is a water pump seal problem but could this be causing a whiring noise? Quote Link to comment Share on other sites More sharing options...
copemech Posted April 14, 2009 Report Share Posted April 14, 2009 Cheers Peter. I have just noticed that the gearbox oil is white when looking through the little glass on the casing, I suspect that this is a water pump seal problem but could this be causing a whiring noise? This is not a good sign! I would recommend the Beta forum as this could get involved! Quote Link to comment Share on other sites More sharing options...
peterb Posted April 16, 2009 Report Share Posted April 16, 2009 Hi kwackerzack, Cope has a good point, best to post this on the Beta forum. White gearbox oil could be from a previous drowning (water getting sucked into the gearbox when the motor is hot and dropped in a stream) or from the water pump seal. I have not worked on a Beta before so am unable to advise on the history of parts wearing, also I don't know if the 08 motor uses the gearbox oil to lube the clutch side main bearing. Also, ask some of the lads at a local trial, they would be in the know. Bye, PeterB. Quote Link to comment Share on other sites More sharing options...
slapshot 3 Posted April 16, 2009 Report Share Posted April 16, 2009 Chaps, moved this in here from the Mechanical Talk general forum. Can anyone give Kwakerzack any more advice on solving his problems? cheers forum mod Quote Link to comment Share on other sites More sharing options...
hrc1 Posted April 16, 2009 Report Share Posted April 16, 2009 There seems to be a mains issue with later Rev3s now. Not sure why, older engines were okay. However don't confuse the noise with the primary drive whine. All Betas get this eventually. Some sooner & louder than others. Apart from the noise, its nothing to worry about & pricey to fix if you're a perfectionist... Quote Link to comment Share on other sites More sharing options...
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