Bjawes, i just read an article you said you've been a technician for 13 yrs, surface heads on wood, dont worry about too much compression kick it over make sure it feels good, and now you cant jet a 2-stroke. In the high tension setting the reeds shouldnt affect jetting, I cant say what the pipe will do. There are 3 different jetting specs i use with my bike @2500ft 75+f/ 6bey31-74 2nd gr, 360m, 32.5p 35-75f/6bey30-74 2nd gr, 370mn, 32.5 p 35-f 6bey30-74 3rd gr, 380 mn, 30 pilot. I use a slightly leaner needle(bigger diameter) than what honda calls for. Reason is in following hondas spec in manual if you run the needle listed the bike will have a blurber when you chop throttle in turn and reapply, going leaner gets rid of it, but it causes bike to surge slightly at idle after wot clutch in. I prefer leaner bottom bike runs incredibly well. 32.5 pilot should be fine for all temps, I drop down in winter cause i ride in snow and sometimes you cant keep enough speed in woods to not coast. It helps clean it up. You need to read your plug for the main mine is always tan, if its dark and low on power lean it down. This bike is very sensitive to jetting. On the track i can usually tell when its rich, it will lose top end power in a hurry. So if i havent confused ya yet here it goes: get some mains and needles, run the bike hard with a large (380) main jet for a few minutes and check the plug lean it out till you have a nice tan color to a light brown you should have good top end power. then set your throttle response with a needle, if the bike blurbers go leaner, but keep your needles in the 2nd groove. Dont forget to increase main as it gets colder wot with lean main will ruin pistons. I also run 32:1 Pennzoil 100% synthetic marine.