Rattly engine - SV650.org

07-01-09, 04:54 PM

I know its not an sv, but please dont shoot me

My ZXR750 has a rattle when running on it's sidestand, when upright or leant to the right its silent.

Is this a loose camchain?

i know the garage wanted £450 to do the shims, so i guess it wouldnt be a cheap fix. I do most things myself, but i dont like working on valvetrains, too much to go wrong!

07-01-09, 05:07 PM

Aye, most likely the cam chain as the ZXR750's were also known for that (or do you mean a ZX7R?)

07-01-09, 06:31 PM

definately a ZXR750, its a J1.

07-01-09, 06:40 PM

Check your oil level. obviously with the bike on it's side stand the oil runs to that side of the engine (the side it leans towards). Thats why you check the oil with the bike level. If it's low this may be causing oil starvation with the bike on it's stand.
I not familier with your bike though, so I'm only guessing.

07-01-09, 09:02 PM

My GS makes noises it's call cam end float. Dissappears when tilted to the right.

Could this be your problem?

07-01-09, 10:05 PM

that does sound similar, it goes completely when tilted to the right. What is cam end float, its not something ive come across before

07-01-09, 10:12 PM

Sounds like a cam chain tensioner.

07-01-09, 10:42 PM

Quote:

Originally Posted by jamesrichardson

that does sound similar, it goes completely when tilted to the right. What is cam end float, its not something ive come across before

I was told its wear in the head, it's not detrimental but i think the only way to fix it is a new head, (thats £800 + for the GS). I shudder to think what it would be for yours.

It sounds like a hammer tapping on the exhaust, comes and goes and esp goes if tilted to right, stays there when tilted to left.

Basicalyy as far as i understand it the cam shaft is banging against the head. Fairly common on GS. I went in to see if it could be shimmed and ended up buying a brand new SV650.

yorkie_chris · 07-01-09, 11:04 PM

£450 to do shims... fackinell. Bring a haynes over to mine and we have a look at it.

Cam end float has been an issue on a few bikes, and does sound more likely as I doubt tilt would affect a camchain.

However is the rest of it healthy? Motors can sound wierd because of head gasket leaks, exhaust leaks, misfires popping through the pipes... etc.

Sid Squid · 08-01-09, 08:46 AM

Also check carb balance, when it's off the clutch on those can be noisy, also the do you have a separate alternator atop the gearbox on yours? they rattle a bit when the motor is unbalanced too.

07-01-09, 04:54 PM	#1
jimmy__riddle Guest Posts: n/a	Rattly engine I know its not an sv, but please dont shoot me My ZXR750 has a rattle when running on it's sidestand, when upright or leant to the right its silent. Is this a loose camchain? i know the garage wanted £450 to do the shims, so i guess it wouldnt be a cheap fix. I do most things myself, but i dont like working on valvetrains, too much to go wrong!

07-01-09, 05:07 PM	#2
Dangerous Dave Guest Posts: n/a	Re: Rattly engine Aye, most likely the cam chain as the ZXR750's were also known for that (or do you mean a ZX7R?)

07-01-09, 06:31 PM	#3
jimmy__riddle Guest Posts: n/a	Re: Rattly engine definately a ZXR750, its a J1.

07-01-09, 06:40 PM	#4
shifter Guest Posts: n/a	Re: Rattly engine Check your oil level. obviously with the bike on it's side stand the oil runs to that side of the engine (the side it leans towards). Thats why you check the oil with the bike level. If it's low this may be causing oil starvation with the bike on it's stand. I not familier with your bike though, so I'm only guessing.

07-01-09, 09:02 PM	#5
AmigaNut Guest Posts: n/a	Re: Rattly engine My GS makes noises it's call cam end float. Dissappears when tilted to the right. Could this be your problem?

07-01-09, 10:05 PM	#6
jimmy__riddle Guest Posts: n/a	Re: Rattly engine that does sound similar, it goes completely when tilted to the right. What is cam end float, its not something ive come across before

07-01-09, 10:12 PM	#7
Sideshow#36 Guest Posts: n/a	Re: Rattly engine Sounds like a cam chain tensioner.

07-01-09, 11:04 PM	#9
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: Rattly engine £450 to do shims... fackinell. Bring a haynes over to mine and we have a look at it. Cam end float has been an issue on a few bikes, and does sound more likely as I doubt tilt would affect a camchain. However is the rest of it healthy? Motors can sound wierd because of head gasket leaks, exhaust leaks, misfires popping through the pipes... etc. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

08-01-09, 08:46 AM	#10
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Re: Rattly engine Also check carb balance, when it's off the clutch on those can be noisy, also the do you have a separate alternator atop the gearbox on yours? they rattle a bit when the motor is unbalanced too. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

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