Hi there peeps need a little help,I've got a rock solid hp2 50cc ( has billet head, dellorto carb, head porting and new ngk plug cold one) and have ran her in about a week ago on my 4th or 5th tank now. It is very smooth and responsive in the revs and when I was running it in I never went past 30 k/ph.. Now that its run in I've been starting to put the throttle down and its still verry smooth and picks up nice until it hits 35k/h exactly.. when it hits 35 it just starts sorta splutering like its top speed and its not even reving that much feels like there's heaps more to go.. if I hold it for a little splutering at 35 it Kicks in reving smooth for a sec or so but still doesn't feel rite.. I know its got way more in it as my old 49cc (had been around for years) went around 60k/h and sat at 45 pretty nicely, that was just an old untouched 49cc. I am useing the stock cdi that I have had for years and a old bosch 8mm lead I was thinking it may be the cdi as its the only thing that hasn't been replaced and may not be keeping up at higher rpm? maybe a jag cdi or get rse to make me one idk? Any help would be great! can't belive I just wrote that on my phone.. o . O thanks heaps Josh.