Well I have my new engine on my bike. Its a thats dax bottom end with arrow reed middle and fred head. The problem is the drive train and also the carb. I have an adapter that bolts into a disk brake mount on the back wheel. I threw the chain wich bound the back wheel and broke spokes. I want to be able to keep up with traffic, whenever Im at full throttle things tend to brake I need ideas for a solid heavy duty back wheel setup. Additionally my keihin carb is problematic. the acceleration is poor. I was hoping for more low end torq with the reeds but it is slugish. It definately has a higher top speed and the dax bottom end keeps it a lot smoother than my previous engine. I have the needle set to the lowest fuel seting with the choke halfway on to run it. lowering the needle clip makes it worse. I think I need to down jet it but the jets are not marked with the size and I have been unable to contact arrow. do I need a moped hub and smaller jets? can I get a moped hub to replace a 26 inch wheel. when the engine picks up speed its fast but lagges on the low end. Im sorry for the length no other choice.