I hate leaving bad product reviews but this thing really needs improvement. First, the tip doesn't have exactly the same taper or length as the original. This hair is shorter and larger in diameter. The other problem, at least on my '99 WR 400, is that the head of the bolt goes into part of the carb before it hits the bottom, so you can't start from the bottom and count the number of turns. It seems to me that the thing as a whole is too short. This works as they say and it can be used but…