Zeda 80 or YD100 for a Cranbrook board track racer build?

[Nightster]

I’m more concerned about dependability. But love the idea of more cubic centimeters.

here’s my build thread, still just collecting parts at this point

Cranbrook Springer Forked BTR YD100 Replica Build (without fabrication)

I have been reading up on this website and some others for a little while now. I’ve gained an immense interest in building a motorized bike. I want to do something just a little extra ordinary, by trying to emulate an old Indian Board Track Racer without any fabrication. In other words I’m...

motorbicycling.com

It’s my understanding there are a lot more performance parts for the 66cc China doll, not to mention its been around longer.

So what’s the consensus? Can I obtain 35+ Mph out of the 66cc?

 

[wrench]

Sure you'll get 35+ Mph stock

 

[Nightster]

What mph could I obtain with the high performance head, carb and exhaust on the 66cc? Close to 40 would be cool.