Loud knocking sound - 3rd gear, 4000rpm

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Caakman400
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Joined: Sat Mar 31, 2007 10:18 am
My Bike: ZXR400 L5 1995
Location: Hiroshima, Japan

Loud knocking sound - 3rd gear, 4000rpm

Post by Caakman400 »

Noticed a very audible knocking sound today. Only seem to get it at third gear (@ about 4k rpm) - if I keep the revs rising it disappears. Strange. Guessing this is not engine related? Chain? Gearbox? Anyone else experienced this? :smt017 I seriously hope it doesn't spell more time in the garage :smt053
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RedexRobB
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Re: Loud knocking sound - 3rd gear, 4000rpm

Post by RedexRobB »

Might just be the chain, check the tension on it :smt001
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masterofinsanity
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Re: Loud knocking sound - 3rd gear, 4000rpm

Post by masterofinsanity »

yeah as robB suggests could be slack in the chain knocking on the swinger.
Don't forget people there is more to the zxr400 than this forum... check out www.zxrworld.co.uk also.
Caakman400
Posts: 54
Joined: Sat Mar 31, 2007 10:18 am
My Bike: ZXR400 L5 1995
Location: Hiroshima, Japan

Re: Loud knocking sound - 3rd gear, 4000rpm

Post by Caakman400 »

That'd make sense, I'll check the slack when I get up tomorrow. The knocking bluddy scared the shait outta me earlier - I thought the engine was going to seize :smt037 . what a muppet - heh.
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Caakman400
Posts: 54
Joined: Sat Mar 31, 2007 10:18 am
My Bike: ZXR400 L5 1995
Location: Hiroshima, Japan

Re: Loud knocking sound - 3rd gear, 4000rpm

Post by Caakman400 »

Yup - a very very loose chain. Had been too busy to check the last few months. Anyway, ended up changing the oil, bringing the tyre pressures down a tad for some summer road...er...track racing, and topping up the coolant. Tis riding like a banshee out of hell... :smt007
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deviant
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Re: Loud knocking sound - 3rd gear, 4000rpm

Post by deviant »

Caakman400 wrote:Yup - a very very loose chain. Had been too busy to check the last few months. Anyway, ended up changing the oil, bringing the tyre pressures down a tad for some summer road...er...track racing, and topping up the coolant. Tis riding like a banshee out of hell... :smt007
glad it was a simple fix
In the garage:
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Suzuki DR800 - bouncy
1978 Suzuki GS400 - PROJECT RETRO RACER!
Kawasaki GPz500S - for sale soon
Honda CG125 BR-J - in bits
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