Yeah a timing plate is a good bang for the buck. As for the gearing you could drop one tooth in the front, that should lower you gears a little IMO. I'm no gearing expert though. I still run stock gears on my shee
I would suggest calling Brandon or Shay from WILDCARD RACING, they are a site sponsor on here and they can get any parts you need.
I personally run CPI Inframes on my shee
How much do you want to build it? What kind of riding will you be doing?
Pipes, Filters, Cool Head, Reeds, +4 Timing....I think those are your first few basic motor mods IMO.