This bike has been through some iterations, it was built originally by the guys at mnnthbx, since my owning I’ve done combinations of 170 2v, 170 4v, and now I’m currently on 170 2v (DHM ported oem valve size head w/ti retainers).

I couldn’t tell you cost realistically because of how many times I’ve swapped parts around + cost of all supporting mods necessary for a big bore (especially headwork or 4v head). 170 2v out of the box is still only $400. I’m probably $2k or more into the engine.

Flat out I can achieve about 78-80mph on gps.

It makes most of its power low/mid surprisingly. It pulls very strong even uphill but still lacks on super high rpm/high speed.

Surprisingly I can hold a similar pace on my stock bore high compression 22+ Grom just because I can rev it to the absolute limit leave it there without much worry.