I can make gears in my shop but I do not have the type of heat treating oven it takes to properly heat treat and case harden gears. 

Heat treating gears takes many hours in a special type of heat treating oven.  Heat treaters charge by the hour for oven use whether the oven has one part or a hundred in it.  This makes small batches of gears unaffordable.

Titanium is too soft and cannot be heat treated to a hardness that is required for gears. 



I see three problems with Suzuki's gears:

1.  The feed rate on the gear hobbing machines appears to be set on high resulting in a very rough surface on the gear teeth or the hobbing cutters they are using need to be of a better design . 
2.  The gears blanks appear to be cast and I think that the material is not as good as it should be.
3.  The case hardening thickness is not consistent from one batch of gears to the next.