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Discussion Starter #1
I have an engine noise on my MV750. I have had an MV Technician take a quick look at it. He tells me it is the drive gear that the alternator runs off. Tried to remove the alternator.
Is is possible to remove the alteranator without dropping the engine?
Can this "gear" be replaced from the engine without having to split the casings?
 

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Is is possible to remove the alteranator without dropping the engine?
It's not a matter of dropping the engine, more a case of lifting the chassis.

But, just removing the alternator does not really give access to the "gear" - I'm pretty sure you don't have to split the crankcase as you remove it from behind the clutch.

Are you sure that is where the noise is coming from - it seems a very definite diagnosis bearing in mind the number of bits flying aroung in the motor/gearbox/clutch! I had an annoying engine rattle (particularly at 4-6,000rpm) and thought it might be the alternator. Turns out that the cam chain tensioner had malfunctioned (again!) and allowed quite a bit of slack. I checked the alternator anyway, but it seems fine.

Bike is still in bits, so I'm not absolutely sure that I've fixed the noise...........
 

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The motror is normally quiet untill it warms up, try putting EVERYTHING electrical on, wait untill the fans start then switch on headlamps, brake lights, etc and see if the noise goes quieter as the alternator loads upif it does I would say without hearing it that all is OK , they do rattle from the alternator gears............
 

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Sometimes I think its making noises too but after it warms up and I run it for a little while it usually goes away. I think that because my 4 other bikes are japanese and they dont make any noises except from the exhaust.
 

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Discussion Starter #7
The MV Mechanic was pretty sure the nosie came from the alternator. did the listen with the srew driver diagnosis.
It seems really noisy at idle, once I rev the bike a little, the "rattle" seems to subside.
It does also only seem to get worse when the bike has warmed up. I will try turning on all electrics and see the result.
As luck would have it though, a stone knocked a tiny hole in my top radiator on this mornings ride. Are radiators repairable?
 

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Are radiators repairable?
If it's just a small hole I would imagine that it is - but take it to a specialist. I tried to repair mine myself and it did keep me going for a year, but in the end had to buy a new one as I ended up making it irrepairable!
 
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