
LOL Conrad! Does get draining, eh? Each option creates parameters that cause concerns that create "have to's" An enigma wrapped in questions surrounded by what if's.
I can't spell it close enough but there is a Japanese phrase pronounced "Shin dow goo" The literal translation means "Demented Machine" but denotes a device designed to make one's life easier but seems dedicated to the opposite.
For this build, I am planing to go clone, Grubee reduction gear, home made (flat stock with 4 U bolts) mount although you got me thinking Ocscully! and a thumb throttle on a Felt bike. Keep it simple and as home built as possible. So is a 4 stroke bike for around $700
Bike has steel frame and I
really want to do a fancy inframe gas tank.

, ayup, keeping it simple.
Side note; Ya know when some one comes up and asks "Did you make that?" I really want to say "yes" and not "it's a kit. You just bolt it on"