May 3, 201511 yr 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 ?
May 3, 201511 yr 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
May 3, 201511 yr 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.
May 4, 201511 yr 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, 201511 yr by axulsuv
May 4, 201511 yr Author 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
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