I have recently put a 70cc kit and Leo vince on my piaggio Nrg mc3; I had a 58 jet in and it idled good and would pull away like a rocket then drop revs so it barely went, Iv just put a 68 jet in and it barely starts and when it does it won't idle and cuts out when I try a tiny bit of revs!! Is there a ball park mixture and idle screw setting that would help me out??? Cheers Mick
With a pipe it should have around a 60-62 jet in. I have a 64 but im running rich. So you need to upjet for the 70 kit but not sure how much more to upjet for the 70. The mixture screw should be around 2 an a half turns out. Have you fitted new rollers for the 70kit an are you using an airbox?
i dont know about the rollers i had a fiddle with the screws today and got it runnin it was better than when the 58 jet was in reckon i just need to tweak it and get it check to make sure it is efficient do i just weigh one roller to determine the weight? standard airbox new plug fresh petrol fresh oil carb cleaned from top to bottom including all jets and stuff cheers for the advice mick
i gt a nrg extreme basicly same bike n ive got a 70s / wack a 70 - 75 jet in mines on a 75 n the reason y your ped wouldnt start when u put a 68 in is because when you swop jets all the petrol comes out the carb so when u put it back on n try n start it theres no petrol goin in the engine give it bout ten kicks with choke up n itl start fine
Ok 75 it is then, the lad at the shop said a 68 would do I had a mess on with it got it started and running round the block and still isn't really fast I'm tryin to see how it reacts to full throttle also trying to run it in
ye tryin to jet a bike when its not run in is risky i had to do the same and i blown a piston up / well its ether youve got a shit carb or an air leak what carb and mm isit
