raptor briggs motor shifter conv?

[raptorkart]

for sure, im going to get this one going first just to see how it runs, its been a long time since ive driven it, i think its built to like 12hp (my dads friend used to build race karts) but im not positive, i think it goes like 80mph when tuned correctly
started as this motor

 

[raptorkart]

so i found out today that the raptor engine is not the 12 horse motor, that was the old one we had. the raptor was converted to run on methanol, but other than that and a carb i think its stock.

with this said, i know its a 206cc 4 stroke, what would be a good size motor to go with? cc wise* i know you guys recommended 2 stroke? would a 200cc still be good? or even 125cc?

 

[redsox985]

A 125 will be just fine. My friend has an rm125 that puts out about 35hp stock.