KZ305AE vs. KZ305AE

The Kawasaki KZ305 motor was used in several different bike. It was used in the 305 CSR as well as the EX/GPZ305 sport bike. I now have both the 305 from the CSR version and the 305 from the GPZ version.

Main differences:
Even though these motors are the same in a nut shell, they have a few key differences. First thing is that the GPZ version of the KZ305 twin produces 6hp more than the CSR versions. How? Simple really, the GPZ KZ305 motors were produced with a more aggressive camshaft as well as a higher compression pistons that bumped the bike to 9.7:1 CR compared to the CSR's 9.5:1 CR. Also, on the later GPZ305s the ignition was an seperate electronic ignition where as the CSR used a "points" ingnition system.

My goal:
My goal is to use the cylinder block, camshaft, and pistons from the GPZ motor. I need to figure out how to make the output shaft on the camshaft from the GPZ work with the points ignition on the CSR head cover. In the end, with a good tuning, less restrictive intake and exhaust, GPZ camshaft and pistons, I hope to possibly bump into the 40hp range.

If anyone finds errors or mistakes please e-mail me!

My spare parts GPZ305 motor: