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men8ifr 05-13-2011 03:53 PM

I have 2 leaking GPR dampers - is it possible to service them myself?
Anyone else done this and was it successful?

I don't think there is a rebuild kit for the GPR's i.e. seals but they are all plain O rings.

Sending both of them off is a bit $$$ () for some-one else to replace the orings.

Both of the dampers are a few yesrs old but I'm a bit miffed they are both leaking.

Mercury264 05-13-2011 07:27 PM

Mate had one leaking - he contacted them, not sure of the exact details but I am pretty sure they replaced it with a new one.

Treewakr 05-13-2011 09:32 PM

I've rebuilt my GPR damper a couple of times. They are pretty simple and straight forward. Just find the right size o-ring and you're good to go. Refilling the unit with oil is the most time consuming part. Add oil slowly and move the lever back and forth to work all the air bubbles out.

Also, changing oil viscosity just a little lighter or heavier makes a big difference in performance!

KTM450SX 05-13-2011 10:34 PM

Don't GPR's have a lifetime warranty?

I only owned one but I thought it did. ( I don't use any stabalizers anymore )

YamWOW! 05-14-2011 05:06 AM


Originally Posted by KTM450SX (Post 15907564)
Don't GPR's have a lifetime warranty?

I only owned one but I thought it did. ( I don't use any stabalizers anymore )

First service is free after that it is $25.00.:deal

men8ifr 05-14-2011 11:27 AM

Yeah we get screwed over here (UK) a service is 55 ($80-90) in the US it's $25.

I've never seen any mention of a first service free so I don't think we get that either.

Better get the O ring kit out - I've tried once to repair one damper but it's still leakign though may be from the adjuster shaft - i did not replace the O rings on that i did not think it would leak there.

It was a pain to get all the air out - I was going to try and submerge the unit in oil and re-assemble it should hopefully be easier.

malsin 09-05-2011 06:58 PM

possible DIY unless too late
My GPR is leaking yet again, after two free redos by GPR after I paid for service (with me paying the shipping so not really free). Unit lasted two years before it leaked. Now it leaks on day one of riding after getting it back. Each

Here are two items that may help anyone else that comes across this thread.

Picture of a GPR disassembled and barebones instructions. I'm less nervous about trying the service myself. I figured I would open the top and have springs flying everywhere ...

GPR refill and bleeding instructions that they used to have on their site. I saved a copy way back when and now it isn't posted anymore. So here is my copy of their document:

luv2lean 03-13-2012 03:02 PM

Thanks Malsin for the useful instructions. It looks fairly simple. Anybody found a good source for the o-rings?

ndrordr 04-12-2012 06:27 PM

Anyone that's done this know what the size of all the little allen screws is? I am in need of re-oringing mine, but none of my metric or sae allen wrenches fit.

Any help is appreciated.


men8ifr 06-05-2012 10:20 AM

I will have to try again - I'll try to take some pics and let you know O ring sizes etc.

Re the allen bolts all I know is it's a U.S size and was standard in a small set of allen heads I got in the UK so should be very easy to find in the U.S. Also re the O rings a $10 O ring kit with say 20-30 different sizes should have all you need.

Regarding the re-filling and getting air out all I do is fill as much as possible and re-assemble then turn the unit upside down, remove the 2 small silver cross head screws and pour a bit of oil in each then move the damper arm slowly left to right adding oil at each screwhead for 20min and all teh air should be out. Check by setting the damping to max and moving the arm by hand left to right - you should feel no free play in the arm around the centre.

de Razendebol 06-05-2014 02:22 PM

did mail gpr directly
Okay, it is easy diy but they don't sell the o ring kit, just measure the seize with a calipher,
all standard seize, fill oil with a syringe, good examples on you tube how to do it
got mine gpr 4v dirt 2 years and start leakingwill take it apart and post the seize

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