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About LinkBacksI have a 98 zx9. I was at the races this past weekend and at idle the motor was not noisey but at above 4000 rpm it was clattering and making all kinds of noises, from the top end. Do I have a bucket and shim that is hanging up, really loose, or did one of the bolts break that holds down the cams? Any ideas or has this happened to anyone else? Thanks for any and all info.
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noisey valvetrain
This is a discussion about noisey valvetrain within the Old School Bikes section, where you will Nobody gets left out with this forum; I have a 98 zx9. I was at the races this past weekend and at idle the motor was not noisey but at above 4000 rpm it was clattering and making all kinds of noises,
- 06-08-2010, 08:05 PM #1Moving up the Ladder
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noisey valvetrain
wide-open throttle 'til you see god then hit the brakes!!
'98 ZX9R (998, Hays convertable, Team Masher Racing, Vortex Racing, Klotz Lubricants, APE)
'99 Ducati 996 Biposta
'04 Yamaha Warrior
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Re: noisey valvetrain
cam chain tension factory or manual
Frankenstein
A-State Boys Racing
- 06-08-2010, 09:56 PM #3Moving up the Ladder
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Re: noisey valvetrain
factory one
wide-open throttle 'til you see god then hit the brakes!!
'98 ZX9R (998, Hays convertable, Team Masher Racing, Vortex Racing, Klotz Lubricants, APE)
'99 Ducati 996 Biposta
'04 Yamaha Warrior
- 06-08-2010, 10:44 PM #4Super HoleShot Member
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Re: noisey valvetrain
Pull the cover off and look to be on the safe side.My friends bike just destroyed a bucket and shim at the track and the bike was making a noise like that and he ran it anyway.So just check so you won't have to buy a head like he is going to.
- 06-09-2010, 12:20 AM #5Moving up the Ladder
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Re: noisey valvetrain
if it's a bucket of shim (found out the hard way) it will make noise at idle sound like bike not hitting on all cylinders rattles real bad shut it off and pull the cover.. cam chain slack can make the same noise when they jump time..
Frankenstein
A-State Boys Racing
- 06-09-2010, 05:04 PM #6Moving up the Ladder
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Re: noisey valvetrain
It riuns fine at idle but rev to 4k-6k and rattles bad. Not back firing or spitting and sputtering. Gonna pull valve cover and check bolts and buckets and shims. Have heard that they like breaking the bolts or the cover that holds cams can crack and cause a sound like that also.
wide-open throttle 'til you see god then hit the brakes!!
'98 ZX9R (998, Hays convertable, Team Masher Racing, Vortex Racing, Klotz Lubricants, APE)
'99 Ducati 996 Biposta
'04 Yamaha Warrior
- 06-12-2010, 06:23 PM #7Moving up the Ladder
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Re: noisey valvetrain
Pulled cover and cams, buckets and shims looked good. Could it be a cam chain or weak spring in the adjuster? Or maybe a valve spring but then wouldnt it pop or backfire?
wide-open throttle 'til you see god then hit the brakes!!
'98 ZX9R (998, Hays convertable, Team Masher Racing, Vortex Racing, Klotz Lubricants, APE)
'99 Ducati 996 Biposta
'04 Yamaha Warrior
- 06-14-2010, 10:07 AM #8Moving up the Ladder
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Re: noisey valvetrain
Probably the tensioner
- 06-14-2010, 07:00 PM #9Moving up the Ladder
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Re: noisey valvetrain
Can a stock one go bad? And if so what would go bad on them? I see that it can only go one way with the rod and spring pushing it against the guide.
wide-open throttle 'til you see god then hit the brakes!!
'98 ZX9R (998, Hays convertable, Team Masher Racing, Vortex Racing, Klotz Lubricants, APE)
'99 Ducati 996 Biposta
'04 Yamaha Warrior
- 07-02-2010, 07:35 PM #10Moving up the Ladder
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Re: noisey valvetrain
new cct on it and still doing it. going in the motor tomorrow. any suggestions on where to look? did the screwdriver to ear and still suspicious of the valve clearances, sure sounds like the valves. nothing at idle but above it starts in.
wide-open throttle 'til you see god then hit the brakes!!
'98 ZX9R (998, Hays convertable, Team Masher Racing, Vortex Racing, Klotz Lubricants, APE)
'99 Ducati 996 Biposta
'04 Yamaha Warrior
- 08-14-2010, 12:16 AM #11Moving up the Ladder
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Re: noisey valvetrain
found out what the noise was. number 2,3 cylinders rod bearings out and screwed up crank also. if any one has a zx9 motor or maybe a 998 motor give me a shout. thanks
wide-open throttle 'til you see god then hit the brakes!!
'98 ZX9R (998, Hays convertable, Team Masher Racing, Vortex Racing, Klotz Lubricants, APE)
'99 Ducati 996 Biposta
'04 Yamaha Warrior
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