The Cunningham uses many of the same parts as the Orwick .64.

The way the story goes, Cunningham made parts for Orwick and after a disagreement Cunningham started making his own engine (bet you never heard a story like this before). So if you need Orwick parts we may be able to help you.

Most Cunningham parts fit the original. Two timers were used, a "make" and a "break" type. The cam lobe on the "make" type actually closed the point contact and the "break" is the conventional style that opened the contact like the Orwick was supplied with.

When we made the engine we increased the size of the crankshaft to .472" diameter. Two reasons for this, first it gave us a stronger crankshaft over the original .437" diameter. Second the original Cunningham used a bearing with a 1/2" diameter ID and a spacer to accommodate the 7/16" diameter crankshaft. You see the Orwick does not have a ball bearing. So our metric bearing and shaft size is the perfect fix.