Started running poorly on the trail, wouldn't rev past 5000 RPM, gradually got worse to the point it wouldn't run over idle, just bogs when you feed throttle. Cold starts takes MANY pulls now with the motor only firing on the clutch side, after about 10-15 pulls both cylinders will fire, and after about 3-5 more pulls it idles great, just won't rev up enough to engage the clutch. I have tried plugs, new gas, checked the fuel filter, fuel pressure (60PSI), checked timing, checked for erratic spark above idle, all is fine. The dealer plugged into it and found no codes present, the TPS was out slightly and they did adjust it to spec. I have tried everything I can think of without just throwing parts at it. This is getting way to frustrating for me! Any help would be great