[OLDKID]

I'm assuming You have a CV carb ( diaphram slide ) I've done this a few times with success . take the needle rod out of the slide and add two or three tiny washers under the head to raise the needle . I start with three . I had one that wanted three , and two that only needed one washer . Idea is it delivers fuel quicker initially. That and or cut one coil off the spring ... Allowing the slide to open easier ... But Thats Permanent. .