Looks like the all the US "Grom" promo videos and pic's are all Standard Headlights vs. the Projector seen in asia. If we get screwed out of the Projector, I'll be sad. Not a dealbreaker by any means, but the USA always get's hosed when it comes to cool Do-Dads. That said, I watched a video of a pack of these, and caught a glimpse of one doing 121Kph which is about 75mph. More than enough speed considering these aren't Highway Legal in Texas (250cc minimum). I could burn up some back country roads though!
They make drop in bbk up to 180cc, 200cc is a jug only setup but needs the case bored and they recommend a big valve head, also read of a 223cc but didn't say its specs, prob a stroker/bb setup
None the less a drop in 180cc, up a tooth or two in the rear and you should see some pretty good numbers