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gs1000 engine rattle

  • Thread starter Thread starter suzukikarl
  • Start date Start date
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suzukikarl

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hi all i have a gs1000 which has developed a rattle noise on idle . all the usual suspects have been ruled out ie clutch basket has been rebuilt with new springs,barrells and pistons replaced , have a different head on, all shimmed up and buckets checked, cam chain tensioner has been out and checked, starter clutch out and checked,carbs cleaned and balanced, this has me baffled guys , has anyone any input into this please the bike runs and pulls perfect.
 
Do you have an APE clutch nut or a stock one? Threads get tired over time, even with the folding tab washer. My rattles have almost always been starter clutch x 6, then clutch.
 
With engine running - do these one at a time:

Open the oil filler cap (yes - with engine running) - is noise amplified?

Pull in clutch - does noise stop?

Pull in clutch, engage first, step on rear brake, slowly release clutch until it bites - does noise stop?

Greetings
 
Possible cam walk/endfloat, they all do that sir!. this may sound strange but does the rattle go when you tip the bike over while engine is running. Have a look at my old posts. Welcome to the forum.
 
suzukikarl said:
hi all i have a gs1000 which has developed a rattle noise on idle . all the usual suspects have been ruled out ie clutch basket has been rebuilt with new springs,barrells and pistons replaced , have a different head on, all shimmed up and buckets checked, cam chain tensioner has been out and checked, starter clutch out and checked,carbs cleaned and balanced, this has me baffled guys , has anyone any input into this please the bike runs and pulls perfect.
Click to expand...
If you have checked all this, it could be the very small rubber cylinder that's behind the clutch hub that's missing.
As the primary gears are heli cut, it absorbs the shocks coming from the hub as it moves inwards or outwards when the engine is slowing or accelerating the bike.
It's the part number 28 on this schematic: http://www.cmsnl.com/suzuki-gs1000-1978-ec_model13504/partslist/FIG-17.html#results
 
John Kat said:
If you have checked all this, it could be the very small rubber cylinder that's behind the clutch hub that's missing.
As the primary gears are heli cut, it absorbs the shocks coming from the hub as it moves inwards or outwards when the engine is slowing or accelerating the bike.
It's the part number 28 on this schematic: http://www.cmsnl.com/suzuki-gs1000-1978-ec_model13504/partslist/FIG-17.html#results
Click to expand...
hi have done this aswell and all in place think ill just drive it see if anything gets noisier? funny thing is i have a gs 850 and you can barely hear it running its that quiet
 
GS1000 clutch baskets rattle while GS850 do not. I had no luck getting rid of the 1000 clutch rattle which is different than the cam chain rattle until I had Falicon rebuild the stock clutch hub. I replaced the nut with an overpriced APE Clutch nut. You can torque the stock one to 50 Ft-Lbs, bend the tab over and it will be loose in no time.

I also replaced the little rubber nub with no difference on mine. You hear cam end float up top, not worth fixing unless your a machinist.
 
like the last post suggests i have rebulit my clutch with the falicon springs , but the funny thing is i had another basket in there aswell and the same noise ,could it be the 2 clutch baskets are wore out ? im hoping to get a link to a video here when i get the bike back from the guy thats fixing it thanks again
 
uk gs nut said:
Possible cam walk/endfloat, they all do that sir!. this may sound strange but does the rattle go when you tip the bike over while engine is running. Have a look at my old posts. Welcome to the forum.
Click to expand...
hi i have tried tilt the bike while running noise is still there on left side tilt .it seems not as bad on
right hand tilt for some reason?
 
londonboards said:
With engine running - do these one at a time:

Open the oil filler cap (yes - with engine running) - is noise amplified?

Pull in clutch - does noise stop?

Pull in clutch, engage first, step on rear brake, slowly release clutch until it bites - does noise stop?

Greetings
Click to expand...
Hi i have tried all 3 and noise is still
there. . But once you get over 1100 rpm its gone
 
[video]vid20150320 113542[/video]hi folks have a video on youtube now how do i get it here? does this link over there work
 
Last edited:
Video link not working. You need to hose the video on a hosting site and then post or imbed the link using the video insertion tool.
 
Suzukikarl, does your GS still have points ignition? The reason I ask is that I had a very metallic rattle on my '79 GS850 at idle. Bike ran great except for the rattle at idle. After checking all the things already mention I checked my ignition timing with a timing light. There was a noticeable difference between timing for 1-4 and 2-3 so I shifted the movable points plate so the timing was the same. Rattle gone
 
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