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mxkid23

yzf450 chain jerking?

14 posts in this topic

when im in first at low rpms and i gas it i can feel the chain rubbing against something and the whole bike feels like it jerks a bit . could it be because i adjusted the sag? any ideas?

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If the chain is rubbing against something, then you either have a bent rear sprocket, a bent chain guide, or the rear wheel is mis-aligned.

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could also be your chain is to loose and when you get on the gas it snaps forward. ive noticed on some 450's if you cruise in 1st and givre a little bit of gas you do heard a snap when the chain tensions.

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yup, 4st hits every 4th revolution so low rpm will get the chain "slapping" as it goes from tight to loose.

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yeah, especially on the big torquey 450s, at idle a fair amount of "chain slap" is normal.

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And check your chain guides for wear if you hear metal rubbing and the inside of your frame.I'm willing to bet your chain is too lose.

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Small throttle openings will give sputtery performance on the 4 strokes and you can get a tugging feeling. The bike isnt pulling smoothly.

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sounds like you have bearing play to me, see if your rear tire moves side to side.

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tire doesnt move at all it tuggs a bit im going to agjust the chain a little and it should be just fine.

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tire doesnt move at all it tuggs a bit im going to agjust the chain a little and it should be just fine.

just be careful not to over-tighten your chain. Remember, when on a stand the chain slack should be between 1.9 - 2.3 inches.

My chain is adjusted to about 2", and I often get "chain slap" when opening the throttle at low RPM. That's normal.

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