This forum is great. I'm addicted, spent several nights searching, reading till 2 am. Just came off 1/4 midget racing with my Son. We had forums, but they turned into b**ch sessions and many perfomance enhancements became political secrets. I'm a recent owner of a '99 WR400, haven't ridin it too much. This bike loves to flood. Typical Yamaha, rich from the factory just like their sleds. I will be ordering the assorted parts for de-octopusing, re-jetting and doing the APJ,(Taffy), mod. Taffy and JD I'm in Michigan, USA, 0-500 ft., humid, cold winters, hot summers. Would either of your jetting specs. be a good baseline to start?