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Thanks for all your feedback guys. Yeah, Timing is OK. Can't believe I didn't even think of the valve clearances, I have even just done them on one of my kids bikes! Like they say, it's the obvious stuff you often forget. I've actually just assumed given its almost new they would be OK...

Theres only a bit of backfiring etc - But its more lack or loss of power towards the top end. When you get past about 2/3 or 3/4 throttle the power just dies right off (coughs and splutters). I have tried different main jets - to me, it seems like 95 too little and 105 too much (that's why I...

Thanks for the replies. Good to see someone shares my pain! It's actually quite a good bike (especially for the $) I just cant get the set-up right to get the most out of it. I think I need to look at getting a different carby etc. Any other advice would be great (either same bike and...

Trying to sort out carby settings for my Pit Pro 150XR. Runs and Idles fine, quite good off the line and down low but coughs and runs like a pig heading towards top end (approx 2/3-3/4 throttle). 150 Lifan Engine with 26mm Mikuni Carb Currently set up as: Pilot Jet - 17.5 Main Jet -...