That is nice. That is the 3d? not cast.
I would guess. 40 to 1. That is my ratio worm and gear.
Riki, the latest engines use Boston Gear 30:1 32 pitch worm/worm wheel. The original Lee Lines gears were brass on brass and were 40:1. With the RPM range of the KTM motors, really needed a little more top end speed, and they happened to fit nicely into the original form (which can be a real challenge with regearing). The new gears, together with the one piece flexible coupling between the two motors fixes a couple of significant shortcomings in the original engine.
These engines use aluminum sand castings from patterns I own that date back to the mid 1970's (which are also made out of aluminum, so super durable). I used up about 10 sets of original castings, then had a foundry recast another 10, of which most are out there, including the castings for Steve's engine. I've been using water jet cut mechanism side frames chemically blackened for a while, these are very precise and solve another problem, since Dana drilled holes on a drill press and used a band saw to make the slots on the originals. I ran out of these quickly, and discovered that he kept his rejects, so those went into the trash. I also used machined blocks of aluminum for the motor mounts and the baseplate, these were originally all sheet metal, once again, variability got into the mix making it hard to get these right.
The new setup allows these engines to run for the long haul, as Steve has proved since he got his.
Probably more than you wanted. Still have castings and wheels for another 4 more, then that will probably be it.
Jim