yamahaty250xox Posted July 11, 2008 Report Share Posted July 11, 2008 (edited) hi all I have been having troble setting up the carb on my 07 rev3 125. i have tweeked the micture screw so it is now 1 1/2 turns out. this produces a lovely tickover, but when im riding the bike 'dies' off the bottom end. sometimes it survives and picks up but moastly dies and stalls. I have a #44 pilot and a #100 main. any help welomed as this is realy Pi***** me off Edited July 11, 2008 by yamahaty250xox Quote Link to comment Share on other sites More sharing options...
the addict Posted July 11, 2008 Report Share Posted July 11, 2008 (edited) Yamahaty250xox, youve averaged about 3 posts per week this year about problems with the bike.........................................for **** sake sell the ****in thing. At a guess the pilot is too small or theres **** in the pilot system, use TTS in high octane unleaded, could even be pilot is too big and flooding the system, not sure about 125 settings but 44 seems a big jet Edited July 11, 2008 by The Addict Quote Link to comment Share on other sites More sharing options...
scorpa3 Posted July 11, 2008 Report Share Posted July 11, 2008 Yamahaty250xox, youve averaged about 3 posts per week this year about problems with the bike.........................................for **** sake sell the ****in thing.At a guess the pilot is too small or theres **** in the pilot system, use TTS in high octane unleaded, could even be pilot is too big and flooding the system, not sure about 125 settings but 44 seems a big jet Say it how it is Addict Quote Link to comment Share on other sites More sharing options...
carl ekblom Posted July 11, 2008 Report Share Posted July 11, 2008 If it run well before it is most likely you have dirt in the idling system. Carefully clean the pilot jet and all idling system passages in the carb body or preferably... clean all jets and passages in the car body. Use clean and filtrated compressed air or an ultrasonic cleaner. Clean and oil the air filter and keep doing this every week. Be carefull to avoid dirt when filling petrol. Pilot jet size 44 confuses me, I think it should be 37 or 38 and main jet around 110-115. If the needle jet and needle combination is mixed up it will cause problems. I have done a number of posts about the VHST carb jettings and problems a couple of years ago. You find them here http://www.trialscentral.com/forums/index.php?showtopic=8792 and here http://www.trialscentral.com/forums/index....t=0&start=0 Good luck Carl Quote Link to comment Share on other sites More sharing options...
yamahaty250xox Posted July 11, 2008 Author Report Share Posted July 11, 2008 Addict, i dont want to sell the bike, it is a good bike just as others has pionted out the jetting seems wrong witch may well be the cause of why i have been posting a lot! i will get some new jets from my bike shop to try, how about a 110 and a 38? ill see what happens. thanks for the help everyone Quote Link to comment Share on other sites More sharing options...
johnkennedy Posted July 11, 2008 Report Share Posted July 11, 2008 (edited) why dont you phone or find out through Lampkin importers, they are always enthusiastic to help. they have to be to sell bikes. the standard jetting should be fine, so perhaps find out what the sandard is and use that, if you still have problems you should definately contact them. when changing the jets make sure you clean jets and passages with compressed air.PS, i am sure the stock is a minuki carb, why not change to that, they cant be that bad, every other 2007 125bike i have heard has ticked over with it. Edited July 11, 2008 by johnkennedy Quote Link to comment Share on other sites More sharing options...
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