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The TTR250 FAQ web pages -> TTR250 -> Sprockets, chains and gearing -> Drive Sprocket
Post Info TOPIC: Drive Sprocket
BM Steve


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Drive Sprocket
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Hi All

Having recently replaced the sprockets front and rear there is now an annoying noise comming from the front sprocket area, nothing is touching, case guard clear etc...

Is it the new sprocket ? the original one, Yamaha had rubber moulded into the sprocket and was much quieter I think

I think I read that here somewhere but can't remember if it's real or my imagination

Thanks

Steve



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2004 TTR250 - Highway Dirtbike Hand Guards, 38mm Bar Risers, D606 Front & Rear, Opened up Airbox with Twin Air Filter, Re-jetted Carby, B+B Bash Plate & Frame Guards, DIY 3mm Alloy Tail Tidy, 14/47 Gearing.

 
Phred


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Hey Steve..I think you are right. The original FS had a rubber on it that deadened sound. When I did mine, it did the same. Heavy grease helped mine. Cheers..

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hertsrider


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I have the same Steve....an annoying metallic sound under gradual acceleration..when i open the throttle further though it goes away..it sounds like the chain catching on/touching something but i've looked and nothing is in it's way...confused!

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TTpower


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G'day Steve,
I had the same problem as well, not sure how old your bike is but with my 99 I found the chain protector/ guard rubber mount on the swing arm had worn away and the chain started to nip underneath at the swing arm.

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TTRfan


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TTpower wrote:

G'day Steve,
I had the same problem as well, not sure how old your bike is but with my 99 I found the chain protector/ guard rubber mount on the swing arm had worn away and the chain started to nip underneath at the swing arm.

I was going to suggest the same. If you have the bike on a stand with the engine running and in gear (not recommended!!!), watch the chain as it comes off the bottom of the front sprocket. It seems to stick to the sprocket and lifts upwards toward the chain slider - which is why I guess Mr Yamaha put one there. This is more pronounced on a newer chain.

Brian 



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Exeter, Devon, UK

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