Thinking I need to make sure my bike has the right jets and then get it dyno tuned. It's a UK 03 WR450 Supermoto, YZ exhaust cam, YZ tensioner, full Akrapovic. It was jetted by feel when the camshaft was fitted but I'd like to know for sure that's it's set up properly as it isn't much quicker than my brothers stock WR450 ’04 :-( So: 1. What size jets should I have? Is there a decent jet kit I can give to whoever dyno tunes the bike? 2. How can I tell what jet I have fitted currently? 3.Anyone know any good carb dyno tuners in SW UK? 4. I have an old style Akrapovic system which is really loud, want to do more track days next year so looking for a new exhaust that has the option to run with a 94db insert and also with out it, can anyone recommend one that's not too expensive? Was looking at DEP S7, any good?