I have a set for the cvk40 and I can not get the mixture screws to make a difference. I can screw them all the way in or all the way out and the bike still runs the same. I would like to try the ones from Brent but I also want to try the Mikuni's. So If you were looking for new mixture screws I would lean towards the ones that Brent sells. Just my opinion, but I think others have had similar problems with the cvk40 mixture screws.
