Help with horrible noise............

Sometimes if I pull away quickly, not stupid revs or anything just a bit more abrupt than normal, I get a horrible kind of screeming noise from the bike, like it doesn't want to go. And it doesn't actually go. I then back off the revs and pull away a bit more smoothly and alls well with the world.

Is this some kind of rider error on my part or is there something I should be looking out for.

Hopefully my crap description makes sense

Cheers

[G]

No idea on a bike, but to me it sound like similar problems i had in my car when the clutch and clutch release bearing went.

I'd have a quick squint at the front sprocket too. Sounds like the release bearing, but it could be the sprocket worn right out if it's losing drive. Release bearings usually scream but you don't normally lose drive.

Clutch plates.

[Biker Biggles]

What bike?What mileage?

I say this as mine does the same every now and then. And I KNOW my clutch plates are worn quite bad. Just can't afford new a clutch.

Cool thanks for the replies. I had a horrible feeling it might be something to do with the clutch. Don't think it is the sprocket, it doesn't feel like a chain slipping type thing, more like the brake is applied as I try to pull away.

It's 1 1999 curvy with 14K on the clock.

It does need a new chain and sprockets, this came up at the big service at 12K. They said the chain and sprocket will need doing in the next couple thousand miles.

It is possible for a very, very shagged chain to ride up the teeth on a sprocket and jump off the top. I've (thankfully) never experienced on a motorcycle, but I have on my very muddy off-road pushbike. The wear between the plates and the pins means that the chain can expand a lot when put under load. When it does this, the distance between the rollers gets greater and can creep up the sprocket teeth, outwards. Grab the chain at 3 o'clock on the rear sprocket and see how far you can pull it away. Even at 3-4mm at most, it's past its best- before date.

Interesting thread ! I've got same noise , only sometimes. I took out the clutch to check it and found the plates to be not as wet with oil as I would have liked? After checking the manual it would appear that the oil supply to plates comes from the pushrod hole. When i re-assembled the clutch ,i soaked them in oil for 24 hrs prior to fitting and the noise disappeared for about a month. I then drained the oil into a clean container and refilled the engine with the clutch pulled in to enable the plates to get a good coating of oil and the noise diappeared again for about a month. I can only conclude that a lack of oil is the problem? But how to fix it ? I haven't got a clue !

I've got a noise that sounds like what you describe as well, mine only happens when the bike is cold, the first few times I let out the clutch to pull away. I reckon it is the clutch going. Sounds like a kind of shimmy/grating sound, almost like a high pitch vibration, then goes away. I thought maybe the plates didn't have warm oil yet, but, we'll see. How difficult to replace the clutch on a '99 SV650N?