right now it is a pd#3, 15cc head with the prop, lightened flywheel, breathing through a rifled 34 mm pj carb, boysen dual stage reeds, and a power pro's exhaust.

I have been very happy with the power of this machine. When it is time for a rebuild I am thinking of running it with a long rod, only time will tell for sure.

 

is it big bore?

 

still a standard bore