lorenzo Posted May 12, 2009 Report Share Posted May 12, 2009 After the anglesey exertions I found that the back end of the bike was getting a little soggy and I'm also guessing that despite the age of the bike, a '97 ZX7R, nobodies ever rebuilt the back shock. As me and thefatman are fully qualified suspension technicians due to our work on the bros project I've decided that I could probably do a refresh job on it. No revalving, no respringing (I'm one of the few who's about the right weight for the back spring anyway), just pulling it apart, maybe putting a new seal on it, and certainly getting some nice new oil in there. I'm also guessing that there's somebody on here who probably runs a business selling this sort of thing for a living (Tootall? Morepower?). So, what weight oil am I going to need to get it back to stock, and where do I get the good stuff from? PS. 01 gang/foolery, last summer it was leaking fork oil, but now it isn't. Does that mean the fork oil was done in the last 12 months? Link to comment Share on other sites More sharing options...
thefatman Posted May 12, 2009 Report Share Posted May 12, 2009 Silkolene Pro RSF 5w should do it. Or Ohlins shock oil if your feeling flash although the specs are almost the same. Link to comment Share on other sites More sharing options...
thefatman Posted May 12, 2009 Report Share Posted May 12, 2009 Silkolene Pro RSF 5w should do it. Or Ohlins shock oil if your feeling flash although the specs are almost the same. And K-tech should sell you a new seal head for it, but probably not needed. Link to comment Share on other sites More sharing options...
David W Posted May 12, 2009 Report Share Posted May 12, 2009 How are you going to re-gas it? I think that is the specialist bit? Link to comment Share on other sites More sharing options...
lorenzo Posted May 12, 2009 Author Report Share Posted May 12, 2009 Don't worry, Schraeder valve arse. Link to comment Share on other sites More sharing options...
tootall Posted May 12, 2009 Report Share Posted May 12, 2009 PS. 01 gang/foolery, last summer it was leaking fork oil, but now it isn't. Does that mean that there's none left in there? Fixed for you. as for the shock oil, best off talking to Rich. Link to comment Share on other sites More sharing options...
levo Posted May 12, 2009 Report Share Posted May 12, 2009 Don't worry, Schraeder valve arse. IIRC you have to use nitrogen .....................not air ,as it foams? Link to comment Share on other sites More sharing options...
lorenzo Posted May 12, 2009 Author Report Share Posted May 12, 2009 Maxton are a short(ish) drive from me, I can get them to gas it once I've done, but they're not local enough to justify 2 trips down there, 1 to get oil and another to get it regassed. Critical to it all is the correct weight of the oil though, and that's what I really need to know before I pull it all to bits. Link to comment Share on other sites More sharing options...
sparx55 Posted May 12, 2009 Report Share Posted May 12, 2009 Maxton did a full respring, re valve, re fresh re oil etc on my zx6r shock, miles better than stock all for about £160 , if you re only after a service they may be able to it for less. Also Kais service my Steelie's Ohlins unit for £90, I don't see why they should want any more for a kwaka shock, the labour is much the same. Mark Link to comment Share on other sites More sharing options...
morepower Posted May 12, 2009 Report Share Posted May 12, 2009 I can sort out the oil and possibly new seals if needed.. but you will need to re-gas the shock...... Link to comment Share on other sites More sharing options...
Superdunc Posted May 12, 2009 Report Share Posted May 12, 2009 The volume of oil is just as important as the weight, so you need to know this also. I've never tried but it possible that your local citroen dealer could gas the shock as they use nitrogen in the suspension spheres on older models. you would need to know the correct pressure though. Link to comment Share on other sites More sharing options...
2 smokes 4 ever Posted May 14, 2009 Report Share Posted May 14, 2009 I use Motul Shock Oil It has a high VI of 400 (ie viscosity deson't change that much with the tmep of the oil so no fade) Don't use fork oil etc as the VI of this is crap and you will suffer from fade as the shock gets hot Most bikes can get hold of Motul if you ask them even if they don't carry it in stock The shock should be full of oil Any air will cause cavitation ad affect damping Fill the shock with oil Push the valve and rod assy into the bottom, top up with oil, then with the schrader valve removed fromt he bladder, push the seal head in. Next add about 20psi to the bladder, and carefully remove the compression damper adjuster to allow trapped air to escape Check the shock has no trapped air - pump the shock up and down - any air will clearly be felt. Repeat above steps Charge the shock with 150psi of nitrogen Link to comment Share on other sites More sharing options...
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