Whining on Bike

[drewskiFZ6]

I have a whine in my gear box, I think, that whines at speeds above 35mph. The whine goes higher in pitch the faster it rotates. I held the clutch in for a few seconds and the noise is still there.
The sound it makes is about the same as road noise the tires on a car make going over a grated bridge. The wheel in aligned properly, the axel nut is not too tight, the chain is straight, and the oil is at the correct level b/c I just changed it. Any ideas here or other people having the same issue?

[madmanmaigret]

you say the chain is straight but do you have it too tight? it should have some slack in it.... and welcome to the forum!

[drewskiFZ6]

The chain does have slack in it. I am lost as to what could cause the noise. My wife and I bought the bikes last year 06 and 04, hers Red mine Blue both FZ6's. I checked hers and there was no noise like the one mine is making.

[madmanmaigret]

try to lift the rear tire w/the center stand, run the bike, does it still make the noise? and can you tell where it is coming from?

edit:what year, miles, mods, etc....

[midnightfz6]

There has been quite a lot of talk on this issue. You are not the only one who has this noise. I certainly do. It is more apparent after adjusting your chain to the correct tension after being slightly slack. My dealer advised the chain being ever so slightly looser than the owners manual suggests. Unfortunately this makes the gearbox more clunky. I just put up with the noise. Earplugs help! It's one of the issues I would love to be rectified in the next model.
Edit: I had this on my previous 05 FZ6 and also my current 07 FZ6

[drewskiFZ6]

No Mods, 04, 7300mi - I put it on the center stand, ran it, and held in the clutch to find out where the noise was coming from a few days ago. It sounded like it was in the gearbox, or the back tire (rear wheel bearing) but then i had my friend listen while i stayed on the throttle and he said it was definately coming from the gearbox. The bike still shifts smooth both up and down, there is no jolt or shake, and everything else on the bike is great, but just that dang noise is driving me nuts not knowing what it is.

[phxtravis]

After changing to SuperSprox's I hade a whine for about 1-2,000 miles, then it went away.

[rbesr]

Does the FZ6 use square-cut gears? If so, that can cause the whine. Some bikes just have more than others. The Royal Star Venture has square-cut gears. Some of them whine like a banshee, others don't. My '99 Venture is a quiet one but I've heard some that will give you a headache after a few miles. Changing the clutch basket helps some but all it does is move the whine to a different rpm.

[jamesfz6]

If it runs and drives fine i would leave it alone. Not all bikes will be the same, some will make different noises than others, some will have clunky gearboxes. It all depends on what you choose to ignore. Until the thing started sputtering and jerking around like you were bull riding, i would not mess with it. Get some ear plugs like they suggested or get some slipons!...

[madmanmaigret]

Originally Posted by rbesr

Does the FZ6 use square-cut gears? If so, that can cause the whine. Some bikes just have more than others. The Royal Star Venture has square-cut gears. Some of them whine like a banshee, others don't. My '99 Venture is a quiet one but I've heard some that will give you a headache after a few miles. Changing the clutch basket helps some but all it does is move the whine to a different rpm.

Yes the FZ has straight/square cut gears.... that could be it... I guess im just used to it?