I'd like to replace the small shift arm (that bolts to the shift shaft exiting the engine/transmission) with something custom.
I have a few questions to help me get started: How can I obtain material that already has internal splines? I'm not even sure how to measure the splines. The OD seems around 11.3MM or .44", but I'm probably measuring it wrong. The number of splines seems to be 28, but it's a challenge to count them accurately (old eyes & tiny splines).
My engine is a 2004 Kawasaki ZX-10R. I have two shift arms that I can modify, but I'd prefer to buy alum or steel tubing with internal splines, and weld what I need onto it.
TIA!