Hi, I have had issues with fouling plugs since i have owned this bike and had messed with jetting until it only fouled them every 2 to 3 hrs. I ended up with 42 pilot, 152 main and needle in 4th clip position with 32:1, which I thought was a tad lean? So after reading heaps of posts I put in a new top end, replaced the right hand side crank seal, added a FMF shorty pipe and boyesen power reeds in an attempt to rectify the problem. It certainly gave it a power boost, but fouled 2 plugs (one was an NKG Iridium IX at $20 AUD ) within 1.5 hrs. I did change the mix to 40:1 on the advice of a bike shop owner... would this make that much difference? Carb jetting is currently 45 pilot, 152 main needle clip middle position with 40:1. What are your suggestions for mix, jetting and needle clip position? Thanks.