Martin Monster Beast 52cc Porting

[monster2.0]

Anyone have any info on porting specs for the Mitsubishi 52cc Engine? Looking to build a OG Super Beast

[dsport]

Maybe measure port timing and go from there. People have posed specs that work for 460s and 40s and 63s, I’d probably just copy that.

[monster2.0]

Maybe measure port timing and go from there. People have posed specs that work for 460s and 40s and 63s, I’d probably just copy that.

That's probably what I will have to do, engines vastly different than most Zenoah's . Transfer ports are huge compared to a 40 but the intake and exhaust ports are somewhat similar. Not many of these engine around these day's, nice to find one in good condition. All keep the site posted on results, hoping for 45mph with stock gearing.