What's with all these wiring diagrams with only one fuse? Seems like trouble waiting to happen....
You're just hearing the starter motor clutch spinning when you kick. Might as well remove the starter chain, plus the starter clutch and motor if you want to save the weight. Would need to fabricate something to mount the starter motor cover over the hole, since the cover bolts to the starter motor.
Regulator/field coil wiring is wrong for your year of bike. Might be but isn't necessarily your problem but the battery won't charge at all.
It shows a green wire and ground going to the alternator. Those are for the field coil, but for your year of bike it should be have the green wire as shown but no ground. Where it shows a ground the field coil should connect to the same brown wire feeding the regulator.
Also, do you have a 2-position ignition switch as shown?
One position for running, one for lights only?
What's that N on there? Neutral switch/relay? Using it?
I'd changd the brown wire from feeding off the blue wire to feeding from the same source as the ignition unit/coils.
As drawn it'd be an unnecessary drain on the battery when you use the lights-only switch position.
Maybe someone else will spot something but the diagram doesn't look horrible otherwise.
I trust you've noticed it only shows one brake switch, when you've mentioned you want front and back?