Is that pull start going to rotate next to your foot?? Maybe it's good it won't start. Get a cheetachrome pull start or a one way bearing. Tuning it to that vm 20 , how did u decide on jetting ? I'm not sure what jetting I would start with. Hopefully u are close. The hpi s of late have a degree wheel etched on. And the flywheel has a timing mark. So it allows for rotating the stator on the three small hex screws unless that pull start is getting in the way of locating it.
When u get it running and tuned consider the hpi 300 gm weight to balance the weight closer than now on both sides of the crankshaft which may keep the torsion on each end more equal and perhaps prolong the bearing life. I think it does. The bike looks great but ya got to respect a rotating object right next to your leg.