john b Posted May 3, 2015 Report Share Posted May 3, 2015 Hi there My Fantic TX250 125cc still wont rev out. Stripped carb, cleaned etc. Bike starts and will rev but over half throttle will bog. Removing the carb boot, so it just pulls with no air filter is a little better, but still not right. Inside the carb boot (joining to the air filter) is also very wet with petrol ?? It is a dellorto carb, shown below. Is this the right carb ? Is so what are factory settings ? Quote Link to comment Share on other sites More sharing options...
furse Posted May 3, 2015 Report Share Posted May 3, 2015 The nozzles on each side of throttle body should have a linking pipe with a hole in the middle of the link, just may be 1 thing adding to another problem Quote Link to comment Share on other sites More sharing options...
grib Posted May 3, 2015 Report Share Posted May 3, 2015 The lack of link pipe shouldn't make any difference. It sounds like it is far too rich - have you stripped the carb and made sure everything is working as it should? PHBL24BS is the right carb but I cant help with jet sizes etc; ring Bill Pye he will tell you what the spec should be. Quote Link to comment Share on other sites More sharing options...
axulsuv Posted May 4, 2015 Report Share Posted May 4, 2015 (edited) Check that your exhaust is clear and free flowing . I had a missing rubber blow gun tip give me fits on my fm330 . It ran just as you describe till I took the silencer off and found my missing blow gun tip lodged neatly in the pipe.... I felt stupid and relief all at once ! Glenn Edited May 5, 2015 by axulsuv Quote Link to comment Share on other sites More sharing options...
john b Posted May 4, 2015 Author Report Share Posted May 4, 2015 Thanks for the advice guys I have had the silencer stripped and repacked, but ive tried without silencer and still the same effect might phone bill pye tomorrow for his thoughts thanks again john Quote Link to comment Share on other sites More sharing options...
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