Hey thank`s guys, i had a 1.5hp 1980 maxi that went 26 stock. I ported the cylinder milled the head and installed a used proto pipe after those mods it would go 34 maybe 36 mph . I had a kit installed with a 19mm dellorto and it went 45 with the stock 14-45 gearing. I have been working on my latest 77 maxi and want to get it going before i gear it . I was thinking about 18 36 but i remember hating the take off when i tryed it years ago .