Clicking noise when shock is extended
Sonny24
Posts: 14
I really hope one of you guys are able to help with this.
When I compress my rear shock I get an annoying click once the rear shock is fully extended?
I ride a Commencal supreme DH V2, all the bearings have been changed (linkage and main pivot) I've replaced the bushings and the rear shock axles, but still the sound persists.
I changed the spring to a stiffer one last summer so I was wondering if that's not been fitted properly? as the sound disappears when the shock is removed and I cycle through the travel, but I removed the spring last night and I'm still getting the same click.
Any advice you'll be greatly appreciated
Oh my rear shocks a Fox dhx rc4
When I compress my rear shock I get an annoying click once the rear shock is fully extended?
I ride a Commencal supreme DH V2, all the bearings have been changed (linkage and main pivot) I've replaced the bushings and the rear shock axles, but still the sound persists.
I changed the spring to a stiffer one last summer so I was wondering if that's not been fitted properly? as the sound disappears when the shock is removed and I cycle through the travel, but I removed the spring last night and I'm still getting the same click.
Any advice you'll be greatly appreciated
Oh my rear shocks a Fox dhx rc4
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Comments
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if you lift the bike up gently by the saddle do you get the click?0
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I get the click if I lift the bike up by the saddle or the frame, I even had somebody hold my front end up in the air whilst I did it incase it was something to do with the forks.0
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sounds like your shock hardware isn't fitting properly so moving. even if its smaller by 1mm it can make that noise.0
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Check the bolt torque, the fixings rely on a slight crucial from the bolt to stop them moving, if you just nip the bolt up the fixings (which are a clearance to the bolt) will move.Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0
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Sounds like shock bushes. Commencal Supreme's eat shock bushes. Any more than 0.1mm clearance and you'll hear it.Transition Patrol - viewtopic.php?f=10017&t=130702350
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RockmonkeySC wrote:Sounds like shock bushes. Commencal Supreme's eat shock bushes. Any more than 0.1mm clearance and you'll hear it.
Shock bushings have been changed and the noise hasn't changed.
It says in the commencal website the shock bolts are M5 which has a torque setting of 5.5-6.5nm0 -
Could the dome style washer the shock bolts fit into need greasing?
Or more ridiculous the fact where the bushings fit into the frame all the paint has completely been worn away down to the bare metal, this giving the 0.1mm of space for the bushings to move around in?0 -
If the bushings can move it will click, hence the need for the bolt to be torqued sufficiently, that same torque is enough to crush a seat tube to clamp a seatpost so should work!Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0
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The Rookie wrote:If the bushings can move it will click, hence the need for the bolt to be torqued sufficiently, that same torque is enough to crush a seat tube to clamp a seatpost so should work!
Ok, the bushings are new and I'm torquing the bolts to commencal's recommend setting, and a 0.1mm intolerance could cause the bushings to move maybe the issue is because there is no long paint in the frame?0 -
If its torqued correctly I would expect it to pinch the frame onto the top hats. Mine (totally different frame I know but same mounting principle) certainly does.
Put your finger across the joint between the top hat and frame, see if you can feel the movement.Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0 -
I'll give it a try tonight and let you know the results0
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thats what you should measure not rely on the specs.0
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Two other things to check.
Have you got enough preload on the coil that it stays loaded as the shock is fully extended? It could be the coil coming loose.
If you remove the coil from the shock do you still get the same noise?Transition Patrol - viewtopic.php?f=10017&t=130702350 -
Yes I still get any noise if the spring is removed from the shock, that was one of thoughts to begin withRockmonkeySC wrote:Two other things to check.
Have you got enough preload on the coil that it stays loaded as the shock is fully extended? It could be the coil coming loose.
If you remove the coil from the shock do you still get the same noise?0 -
When you changed the bushes in the shock did you change the mounting hardware (top hats) as well?Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0
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http://www.mojostore.co.uk/Mobile/low-friction-fox-shock-bush-m8-c2x19537385
These are the bushings I purchased which I think includes all of the hardware?0 -
So you've changed the mounting system completely as I presume the original was a standard DMU bush, nice of you to tell us.
The spacers either side need to be sized correctly you clamp the centre section and stop it moving on the 8mm bolt, get that wrong and it will click As that low friction kit needs different mounting hardware to the normal bushes, have you got the right hardware for the frame mounting width?
Which size did you select from the drop down menu?
A Photo taken as square on as possible may help.Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0 -
I purchased the 22.20mm size bushings.
The bushings are mounted on two rear shock axles which I've replaced
http://www.commencal-store.co.uk/Mobile/rear-shock-axle-dim-8x33-mm-for-supreme-dh-v2-supreme-6-supreme-c2x12502240
Which is the bolted to the frame at either end.
I'll not be able to take a picture right now as the rear shock isn't attached to the frame right now whilst I try and sort the problem out.0 -
Commencal seem to spec a 22.2mm kit for that frame?Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0
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Whilst my shocks out of the frame I slid the shock axles through the bushings, should there be a little resistance when sliding it in?0
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It's not an axle....the movement is between the two parts of the loan friction bush.Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0
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The Rookie wrote:It's not an axle....the movement is between the two parts of the loan friction bush.
That's what it's called on the commencal website, the part that slides through the frame and the bushing that's bolted to each end, if it's pushed in to the shock there's slight movement in the axle, both are m8 and both brand new0 -
They can call it what they like, the wide part of the low friction bush acts as the axle and should be a snug fit in the frame so it doesn't move.Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0
