regassing tool

[ITDOG]

Anyone have a regassing needle for old style monocross decarbon unit, tried the KTM one at the bike shop but didn't do squat.....I have an it175H and have intentions  of rebuilding the shock but first have to get the remaining gas expelled. cheers

[Tomas]

Not sure what sort of needle you are looking for. Most of ohlins shock with self-sealing type rubber valves can be filled or emptiet with just normal surgical needle from your local chemist shop plus adapter. Here is an example of what can be used http://www.ebay.com/itm/Race-Tech-Shock-Nitrogen-Needle/361461628737?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D37252%26meid%3D405e7b2a1f90445188322870ba847c3d%26pid%3D100005%26rk%3D2%26rkt%3D3%26sd%3D371396933189
Not sure what sort of filler valve your shock has.

[ITDOG]

Yeah they used the race tech needle but wasn't long enough .....apparently

[OverTheHill]

Any small needle off the end of a syringe should do to release the gas, it's not 'that' far down through the rubber seal but be sure to put a drop of oil down the hole ahead of the needle plus oil the needle or it'll make it hard work & even possibly could push the rubber out of it's home [seen it once only- but]. With my old crap [Rat bikes] i just pump them up with the compressor as hard as it can go which is about 120psi, that's probably about half of what's recommended so ignore my ideas lol--work for me though.

[Viper666]

They should  be done with nitrogen & 230-250lbs

[Tomas]

To make things clearer, I would not bother with Nitrogen gas too much. Air is 70something percent Nitrogen anyway. I did all my Ohlins shock with air and they seem to work fine. Nitrogen is something bike shop want you to do so they can charge money for it. Suzuki manual recomends dry Air for their forks. I normaly use shock pump for my mountain bike shock and it also works with old ohlins shocks that use old schrader valves. It pumps up to 300 PSI and no it does not take long to pump up a shock absorber. Here is an example of what I have. http://www.ebay.com/itm/FOX-RACING-SHOX-SHOCKS-AIR-PUMP-W-GAUGE-150-PSI-FLOAT-II-AIR-SHOCX-FLOAT3-SHOCK/301928869160?_trksid=p2045573.c100034.m2102&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20131003150253%26meid%3Dd52a1aecbe074660a5d6040a2e9f7805%26pid%3D100034%26rk%3D1%26rkt%3D8%26sd%3D400822585804
Pump also have a pressure relese valve so if you hook it up to that race tech needle you can lso use it to depressurize shocks.
Also if you need thicker needles your local vet may have thicker ones they use on bigger animals.

[pokey]

Nitrogen molecules are larger than most of the other gases. nitrogen molecules are also larger than the tiny spaces between the molecules or rubber diaphragms. This is why Nitrogen is a suggested media. the bladder stays inflated longer. same with tyres.
 

[Tomas]

Nitrogen molecules are larger than most of the other gases. nitrogen molecules are also larger than the tiny spaces between the molecules or rubber diaphragms. This is why Nitrogen is a suggested media. the bladder stays inflated longer. same with tyres.

Yes that is true, but by using Air you only loosing 20something percent of Nitrogen. And since shock pump is en enexpensive bit of kit everyone can have one and top up/check your shock pressure more often just like you check your tire pressure before ride. If Iam not mistaking lot of modern dirt bikes now uses air forks and shock pump is included in a basic service kit when you buy a new bike.I may be wrong on this one. I do not know much about modern dirt bikes.

[ITDOG]

Thanks for the input, I work in a hospital so needles are abundant, just got to find the right one that I can slip some o rings on etc

[JohnnyO]

You need to get the fitting that the surgical needle goes into to regas your shock, then you can inflate it with a normal tyre pump fitting using either nitrogen or air

[ITDOG]

yep

[topari]

If you use a shielding gas like argon, then a nitrogen setup can be made to suit. I converted my racetech setup to use argon.

I like the fox racing setup.

http://www.ebay.com/itm/FOX-RACING-SHOX-SHOCKS-AIR-PUMP-DUAL-GAUGE-300-PSI-FLOAT-II-AIR-SHOCX-FLOAT3-/121376742660?hash=item1c429e1d04:g:8yYAAOxyOlhSy~3S&vxp=mtr

[ITDOG]

Ok managed to let the remaining nitrogen out with a drawing up needle...nice and long rigid with no sharp end.
will now try to marry it to the race tech paraphernalia.
What weight oil have people been using on these shockers, recently rebuilt my 2T wr250 shocker with 5Wt, something tells me 10Wt for the old monoshocker

[OverTheHill]

with my 'home' setup in yamaha shocks with the needle & compressor i just remove it before disconnecting from compressor so it's under pressure right till it's pulled out [if that reads making sense]. Can't realy check it after that or your going to loose X amount as doesn't hold much. With the valve type shocks in the odd one i've done i just use a 'hold on' type pump fitting 'not a clamp' on type so i can instantly pull it away to hopefully seal up instant. I do it that way because i just pump up to the compressor max 120 or whatever. At work with all the gear & nitrogen i could just crank it up to whatever pressure & carry on. Not right i know but needs must.

[ITDOG]

Operation was a success , managed to get the original seal head out in one piece(figuratively....well 3 pieces I think they are), filled with 500ml of oil 5w-20w shock stuff and gassed with 200psi plus of plain air just with my racing bike hand pump straight onto the hypodermic needle. Seems to be working well, seal head has a recess and circlip can be wormed out by rotating with some multigrips, then the second has to be removed before pulling the plunger out.

The oil was fed with the reservoir at the lowest point and tapped frequently to get out trapped air ...filled to between the circlip retainer grooves, piston in reservoir was set at about 30% from the top, second circlip was not refitted as this hinders the insertion of seal head which is actually pushed slightly passed this point in aid of easy fitting of the last clip, the needle is left in valve to facilitate air escape during the process, then pumped to desired pressure once clip is installed.

Total cost for exercise was nil $ as I already had the oil leftover from a previous job...however I was stung $17 for the initial regass at the shop which only proved to serve I had insufficient oil in the shock to begin with ...hope this helps someone with their shock and thanks to all for their input