Post by Hobbyhorse on Dec 14, 2016 21:09:27 GMT 1
I am sure this has been covered a number of times but my search did not uncover the answer I am looking for.
I have a 1997 PX150 with 5000ks on it which runs well through the higher rev range and will make 95kph on the motorway but has a very annoying flat spot when coming off the idle. I have adjusted the mixture screw and all is well until the engine gets hotter after say 10k, at which time I have to stop and readjust the mixture. It takes almost no movement on the screw and the scoot is then good for a days run but the following day the same procedure has to be repeated. I am now looking at the idle jet which is the standard one at 48/100 and wondering whether a change here would help.
My question is which jet should I buy ... up in the numbers or down?