jetting carb

[Blue bandit]

Hi all
Going to install genuine Honda gx390 carburetor on a highly modified gx200 but still on gas and stock cc
So what size of main jet, anyway as a startpoint will be great

Thanks
Lars

 

[jsstump#70]

40 main. (.040 inches) Honda speak, it would be a 100. (1mm) Rough guess mind you. Good luck

 

[joler1302]

40 main. (.040 inches) Honda speak, it would be a 100. (1mm) Rough guess mind you. Good luck

Good guess, depends, if you plan on modifying the carb? Like bore it or another e tube?