That is a 250cc engine intended for superkarts. they do nice work but not cheap . The kit is over $4k but still needs a bunch of stuff, like a pipe and the english 250 pipes typically sell for $750 alone.
They are coming out with a KZ 125 version of the link I posted, looks the same. Tkart just posted it. Obviously its not replacing anything. Don’t want anyone to get to freaked out. It still looks cool.
So the 250cc kit with the pipe and extras is still the same as a Honda CR125.
Ok, really I just thought the engine was cool and that it looked to be using CR style electronics. Wasn’t really concerned with the price. But in typical fashion you get to hear how cheap the CR is. Really to be honest a 1999 Engine should be complete with everything about $2500. That would be what its worth. But in most all regards they are over $5000 from any engine builder complete.
I am pretty sure this doesn’t exist. It has in the spec 54.2 mm stroke. Well at 17,000 rpm the piston speed would be in excess of 6000fpm, WAY above an an acceptable reliable design. The rods wouldn’t be the issue, Honda built its oval piston motor back in the 80’s that spun well over 30,000 rpm the rods weren’t a problem. The piston speed is the real issue with the deign. Yea that motor in the above link, given the specs is a pipe dream.