Well we have pulled my old ninja crank out and put it into his boss. Measured the pin with verniers and the overall diameter etc..was identical.
Also, the only differnce between the 2 is... the Ninja has a little more porting work... same port layout..but the ninja is a little more opened up.
AE TC5R- Drifter
Revo to annoy the dog
Yokomo DRB drifter for the missus.