Fox RP23 grinding noise

duir

My previously super plush and silent 2010 RP23 (boost valve, pro pedal) recently developed a sucking, almost grinding noise. It is particularly apparent during the first quarter of travel and on return to full extension. A notchy feeling accompanies this noise and a loud squelching and is exasperated by adding more rebound. I returned it to Mojo under warranty who did a service and new seals and sent it back but it is still the same. At the moment my girlfriends RP2 on her bike feels super smooth, plush and silent yet my RP23 feels rubbish, anyone out there encountered this problem?

nicklouse

loud squelching and is exasperated by adding more rebound

very normal and expected, it is the dampening working.

a grinding noise is not.

remove shock and check bushes and bearings shock and frame.

thel33ter

Remove it from the bike and compress it in your hands, if it is still there then its the shock, or not, move all the linkages around, and feel for grindy bearings.

duir

Thanks.
Sorry i should have said that I have changed all the pivot axles and bushings on the frame and shock bushings. The grinding noise occurs with the shock on and off the bike. The other noises you say are normal are not the subtle, regular RP23 sounds but a much louder noise that started recently.

richg1979

its normal. almost every bike ive rode with a fox float shock has a noise at the begining of stroke.

thel33ter

richg1979 wrote:

its normal. almost every bike ive rode with a fox float shock has a noise at the begining of stroke.

Every bike I've ridden doesn't, and normally grinding noises are bad...

Briggo

richg1979 wrote:

its normal. almost every bike ive rode with a fox float shock has a noise at the begining of stroke.

Mine certainly doesnt.

duir

I rode a demo orange 5 today and 2 other bikes with RP23s and there was no evidence whatsoever of a grinding feel/noise and it felt very smooth throughout the whole stroke. It also didn't emit the loud squelching noise and had the more normal air shock sound. So I guess I have to get it back to MOJO again as something is wrong in there.

nicklouse

it al depends on the valveing. squelchy noises happen as the damping oil goes through the valves.

depending on a number of factors it can be more or less noticeable. I would not be worried about it at all.

Grinding yes. gurgling now.

cavegiant

Have you spoken to Mojo?

They really know their stuff.
TF might be more fashionable, but mojo are still amazing.

richg1979

duir wrote:

I rode a demo orange 5 today and 2 other bikes with RP23s and there was no evidence whatsoever of a grinding feel/noise and it felt very smooth throughout the whole stroke. It also didn't emit the loud squelching noise and had the more normal air shock sound. So I guess I have to get it back to MOJO again as something is wrong in there.

they all make a noise after a couple of months, its not loud at all and you cant feel it but you can hear it as you start to compress the shock.

my old yeti 575 was bad for it, it was quite loud on that as the carbon rear end amplified the noise
tried 3 floats on that and they all made the noise, some diffrent tones ect but they all did it, tried a RS monarch and it was silent.

its pretty bog standard of a used fox float once its been used for a while.

a damper service on the shock will stop it for a few weeks but it will return.

thel33ter

The shock on my 08 Kona Four has never been serviced, and used hard this last year and is silent.

It's had a lizard skin over it for it's entire life, and still looks pristine.

bennett_346

My fox float makes the said squelching noise through the first 5 or 6% of travel and has done so since about 3 months after i got it, however grinding noise defo not.