mudyman Posted July 17, 2018 Report Share Posted July 17, 2018 Hi all, I have aquired a 280 Climber which is now running but quite unstable at tick over and just above. I have found that the PHBH26CS carb which is the air screw version (not the petrol adjustment screw type) seems to be missing one of the jets. The Pilot jet is I think made up of 2 jets one is deep down and a sort of atomizing jet or idle imulsion tube as its´s listed (which is marked with 68) and there should be an idle jet "deep" sitting in front of this but it´s missing. Can anyone help with the size needed ? Quote Link to comment Share on other sites More sharing options...
2stroke4stroke Posted July 17, 2018 Report Share Posted July 17, 2018 Eurocarb usually give good advice. https://www.dellorto.co.uk Quote Link to comment Share on other sites More sharing options...
teamferret Posted July 18, 2018 Report Share Posted July 18, 2018 i have 2 carbs from Climbers and both only have the one jet, marked 50. I have other dellortos with the 2 jet system but this doesn't seem to be the same. Quote Link to comment Share on other sites More sharing options...
mudyman Posted July 18, 2018 Author Report Share Posted July 18, 2018 Hi 2 stroke 4 stroke "yip" been in touch with them but need a size or at least a rough guide I could then order a few different ones @ Teamferret that´s interesting and makes me uncertain as I was asured it should have 2 and that most people miss the hidden one inside when cleaning. Quote Link to comment Share on other sites More sharing options...
teamferret Posted July 19, 2018 Report Share Posted July 19, 2018 I was surprised as I expected to see 2, so checked the second carb and it's the same. Also there is not enough thread to fit a second one in Quote Link to comment Share on other sites More sharing options...
teamferret Posted July 19, 2018 Report Share Posted July 19, 2018 (edited) Try your SWM carb on it, I think the air intake is slightly larger but you could leave all that off for a quick test Edited July 19, 2018 by teamferret 1 Quote Link to comment Share on other sites More sharing options...
fourex Posted July 19, 2018 Report Share Posted July 19, 2018 (edited) On 18/07/2018 at 3:40 AM, mudyman said: Hi all, I have aquired a 280 Climber which is now running but quite unstable at tick over and just above. I have found that the PHBH26CS carb which is the air screw version (not the petrol adjustment screw type) seems to be missing one of the jets. The Pilot jet is I think made up of 2 jets one is deep down and a sort of atomizing jet or idle imulsion tube as its´s listed (which is marked with 68) and there should be an idle jet "deep" sitting in front of this but it´s missing. Can anyone help with the size needed ? Didn't the climber have the PHBH 26 BS (fuel screw) as standard ? The PHBH 26 CS (air screw) was a GG carb according to Eurocarb website, either way the below link gives a guide to the CS carb for the '96/'97 GasGas. It gives you somewhere to start. https://www.dellorto.co.uk/shop/dellorto-motorcycle-carburettors-parts/complete-carburettors-dellorto-motorcycle-carburettors-parts/phbh-26-to-30mm/r4168-phbh-26cs-gas-gas/ Edited July 19, 2018 by fourex Quote Link to comment Share on other sites More sharing options...
mudyman Posted July 19, 2018 Author Report Share Posted July 19, 2018 Thanks for all the information given. @ teamferret Yes I was going to put an SWM carb on at the weekend :-) Hope I have the time to try it as the air screw version hasn´t got a good reputation compared with the fuel mix one. The imulsion tube jet is deeper in the hole with a smaller thread and the wider short thread at the end of the hole is for the so called deep idle jet. @ fourex Thanks for this link I will be getting bits sent now I have this. The Climber did have the CS version fitted and it´s also stated in the manual I got with it. It´s the idle emulsion tube that I have in 68 and the deep idle jet that´s missing so I´ll try some around the 50ish Quote Link to comment Share on other sites More sharing options...
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