cubbon77 Posted July 21, 2015 Report Share Posted July 21, 2015 Hi, I rode my mates 08 rev 3 125 in a trial on sat night. it ran fine for two laps then died. There were two small stream crossings but it ran fine after that and performed well all night then Would not start again. I then washed the bike sunday morning, started fine with choke. Since then when my friend has stripped the carb, new dry filter in, dried out the airbox then gone to start it, it has run but with hanging revs. Tonight it was screaming full revs and then would not shut off, kill switch and plug cap off, still going balls out. Any ideas?? They have dried stator out behind ignition cover, checked airbox boot for splits, taken reedblock out ad inspected all that area. Throttle, slide, jets, all seem good. Theres nothing obvious they can find. We'd really appreciate some advice before it ends up going to a shop to be fixed Thanks Quote Link to comment Share on other sites More sharing options...
cubbon77 Posted July 21, 2015 Author Report Share Posted July 21, 2015 It has a keihin carb if that matters? Quote Link to comment Share on other sites More sharing options...
steve_earle Posted July 21, 2015 Report Share Posted July 21, 2015 Check again that the carb slide is closing fully, Might be the cable pulled out of the carb top slightly. 2 Quote Link to comment Share on other sites More sharing options...
shercoben12 Posted July 22, 2015 Report Share Posted July 22, 2015 as mentioned give the cable a little wiggle where it goes into the carb, had this happen alot, even on newish bikes. it needs to sit fully back into the tube that comes out the carb. also place your finger on the side of carb/float bowl and with the engine of open the throtte to full and let go of it, you will know if it has returned fully becuase the carb will make a light clunk as the slide bottoms out. also take the piliot jet and put it in carb cleaner and let it soak, then blow it out with compressed air, it has to be properly blasted through, the 125 jet is so small. my piliot jet on my 125 gets clogged quite often and sometimes causes "hanging" revs. hope you can make sense of all of that! good luck! 1 Quote Link to comment Share on other sites More sharing options...
cubbon77 Posted July 22, 2015 Author Report Share Posted July 22, 2015 A similar thing happened to my old mont 2t years ago. that too was while I was messing about with the throttle cable at top of carb. So if there was a leak on the crank seals it wouldnt be enough to set the bike off screaming each timeits started? Quote Link to comment Share on other sites More sharing options...
cubbon77 Posted July 22, 2015 Author Report Share Posted July 22, 2015 can a leaking crank seal cause this over revving? Quote Link to comment Share on other sites More sharing options...
shercoben12 Posted July 22, 2015 Report Share Posted July 22, 2015 im not sure on that one, someone will know.... have you checked what the above posts said? Quote Link to comment Share on other sites More sharing options...
cubbon77 Posted July 23, 2015 Author Report Share Posted July 23, 2015 My mate has taken the bike to Juan Knights shop, will find out soon whats wrong. Quote Link to comment Share on other sites More sharing options...
cubbon77 Posted August 8, 2015 Author Report Share Posted August 8, 2015 It was the pilot jet that was blocked. Simple Quote Link to comment Share on other sites More sharing options...
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