I have an 04 525 SX. It has the 6 speed transmission swap done. It is converted to street, and is legal. It works awesome on the street, especially in SM trim Right now I have the stock wheels, full knobbies mounted up, and 15/48 gearing. It still works great.....except in the bush. Abruptly stalls a lot! I notice it's mainly when cresting a hill. I get near the crest, the bike slows abit, I back off the throttle somewhat for a moment, then try to get back into it, and it's there where I stops. Almost seems to flame out. I have to pull the hot start every time, and usually takes a few kicks to get it going again. I imagine that the small SX flywheel has some role in this, and I do turn up the idle when I go into the woods, which does help, but I would like better. Would adjusting the fuel screw, or rejetting the pilot circuit help at all. What about dropping a tooth on the counter shaft sprocket?