Supermini Motor Builders and Experiences?

We are looking to build a supermini later this year and I wanted to get some opinions and experiences from people who have been down this road. Due to dealer support we will most likely stay on Kawasaki’s. The only brand I would consider switching to would be KTM.

2015 KX 100:
1). Bore only or Bore and Stroke – advantages/disadvantages>>
2). Crank Issues – Does the extra power cause premature wear/failure on KX cranks?
3). Extra Maintenance? I typically rebuild the bike every 12-15 hours with Vertex Pistons.
4). 109 or 112?

I have heard good things about the Supermini builders below:
1). Lynk’s
2). JMS Performance
3). TDC 2-stroke
4). Varner – Current builder no disappointment so far.


Opinions? Experiences with your builds?

Thanks!