I have a 04 raptor that is bone stock. It seems to be running realy rich and only ideals for about 15 seconds then stops and sounds like a Harely. You can rev it up and see lots of spoke and it sounds like crap. I have tried all kinds of things. I think I pulled my carbs off about 40 times already tryed to adjust everything. I have adjusted my air/fuel mixture screws in all deffrent positions, even all the way in and same thing.I noticed the reverse light comeing on when trying to start this bike and never noticed this light before. I have also adjusted my floats and same thing but have not used the clear tube methed yet but will today. The bike gets great fire and has new gas. The bike also only has about 30 hours on it. Again this bike is BONE STOCK even factory tires.