Yes thanks for reading everything I read and telling me what I read...
I was able to outpace that engine even though I weigh in excess of 100 pounds more than the rider and bike with that motor, this was about 50mph and his was topping out at 46ish. I saw specific flaws in the motor design as to how it was modified, and everything below the belt was stock.
Yes the motor seems to do at least 45 with a 60-70 pound bike and a 130 pound rider upon arrival. This is with reed valves on both motors (not included.) However the price is not worth it, the head is only found used, or directly from the seller, that's fine, I think it's worth what it's sold for. The cylinder mods are done to a 30 dollar cylinder, probably take 20 minutes to cut out, and receives a price hike that seems unreasonable. The lower end had no modifications or upgraded items