I've been thinking about putting in a billet rod & stiffer valve springs into my champion engine, and was wodering if after market honda gx200 parts will fit this engine? I know the rockers are different and are shaft mounted:thumbdown: (no 1.2 ratio rockers) but will stiffer springs and a billet rod still go in. so far all I have done is remove the gov, put on a header, intake, and rejetted the carb. so I'm still getting my feet wet in this engine modification thing and this probably isn't the last Question I'll be asking (bear with me Im still new)