Re: need some help
If your'e certain you've got "good" spark, (nice and bright dancing on the electrode) while pedaling fast (tie up rear and have friend hold bars) so to pedal in stationary position - spark plug laying on top of cylinder head to see.... if bright spark, check your carb by unscrewing the top where the threaded cable goes in (loosen the cable nut and adjustment screw in top) and unscrew the bonet that threads onto the body of the carb. Check if the piston and needle are free. Is the piston aligned with the slot and it's alignment pin? Assemble... does it respond all the way open-up and fall down-closed with twist of throttle? if all's good try again, making sure of proper choke usage and good fuel mix.