:eek: oh my, blow the welds on the manifold!!
yeah start out with a low shot 40-50 and work up from there.
reading the plugs is very important, and can help in tuning the mixture. not enough fuel and the motor can melt, too much and you'll lose quite a bit of power and waste fuel.
work up from the 50 shot to the 65 shot or so only if you know how to make adjustments and if you know that the motor will take more safely.