Thats cool, i have the same engine and built a mini bantam to put it in but been havin collet issues, what i had done is had a supervee 27 flywheel flipped around and machined down,the hole that goes over the threads on the .18 fits perfect on the picco crank, then a groove was made in to use a drive belt from a mini touring car to start.. Now the collet i used a octura for .098 cable and 5/32 shaft,that fits right on that piece they give ya for the clutch bell, then i put a flat spot on that and tightened down the set screw. Now here is the prob, when tryin to tighten up the collet it just walks on that C B shaft and then it blew out the end of it,cuz how it works is the wrench part of it goes inside the flywheel where on the .18 it goes over the crank and the collet presses against it. thought it would haved worked.Not much that will fit these engines,i also put a OS .10la carb on it to get rid of the slide carb fits perfect,good luck with it man, may finish mine if i can overcome the issues, matt