I have a GP Super Skybolt that has an MVVS 91 with a Perry carb on it. The problem is how to tune the engine with the cowl on. As far as I know there isn't a way to extend the high speed (needle) out of the cowl. I drilled out a wheel collar and made a small tool out of a golf club shaft to tune it with. Now I have to figger a way to move the low end disk. If all else, I'll drill the disk in two places and make a tool to fit the holes. Any ideas? mk