I know I'll probably get some negative responses but I wanted to share my experience on this to hopefully save somebody from going the the same hassle as I did. (Plus save them from potential spill) If you aren't having a plug fouling problem or a noticeable bog with your '02 426 I would recommend you not wasting your time with this mod. At least for the '02's My bike ran better than I could expected but I bought into this mod when I should have heeded some wise words. "If it ain't broke, don't fix it!!!!" Anyway, I ran into some riders that had done the mod to their '01's and I asked one to ride mine to see if they noticed the symptons that they had in their '01's that prompted them to make the mod. After riding they indicated they noticed a slight bog but for the life of me I didn't. So I thought what the hell, what could it hurt. (I am a top 5 B class rider and know how a bike should run in case there's any doubt about my experience.) I followed the procedures to a T and took my squirt from 2.5 secs to .3. Went riding, and about went over the handle bars on over a triple as for getting on the gas before the landing as I did before the mod about killed my bike. Went to another track and was seat hopping a double and with the nice little bog the BK mod presented, faced the landing nicely. Well now I'm thinking it's running lean but the plug looks fairly decent. So I start changing the jetting around and it gets worse and worse and this is after the plug indicates I had tweaked the bike to where it was running a tad rich. After a lot of frustration and wasted time today at the track I just tore into my bike and put everything back as close to stock as I could and now my bike is performing awesome. Again, the purpose of this post isn't to try and figure out why the mod failed because I'm not touching it anymore because stock is awesome and it got me a holeshot in a 25 + A and B race. With the mod I just wonder if the bike would make it to the first turn. (Also, with 93 octane pump gas to boot.) I just really want to save anybody with the new bikes from a lot of hassle.