Couple weeks ago, my raptor start making this loud rubbing sound, mins later the chain fell off. After I got home & took the chain completely, I saw that I lost about 4-5 teeth on my stock front sprocket. Well since then I've change the sprocket, I actually went up one tooth so I installed a 14 tooth sprocket. Put the chain on & the sound is still there. It is only making that sound when I'm hitting the throttle & when the chain is moving. I've look everywhere for something that would cause that, & with no success. Any suggestion on what I should check or do?

 

make sure your rear chain adjustment is even on both sides.

 

make sure it isn't hitting the quard by the front sprocket

 

If the chain has tight spots it will do this too. It looks like kinks in the chain.

 

I don't think it's hitting the guard because I had it on before it started the noise, & since I change the sprocket to the 14 teeth the guard no longer fits so I took it off all together. It might be possible the chain is tight, because it's the same chain I had on it before when i had the 13 teeth sprocket.

 

yep

 

Well thinking about the chain, it is also the same chain I had on the 13 teeth when I was hearing the same noise, so I would rule the chain out as well. Is it possible something could be loose inside? A friend of mine said I might need to change my axle or bearings.

 

Any other suggestions?

 

Anybody? I've taken off all the rubber rollers & even the black chain guard. Sound is still there. It's definetely coming from the front sprocket. What's werid is, that when I'm riding on it leaning to the right it doesn't make that sound, only when I'm sitting on the center or leaning more to the left.

 

bump