Just picked up a roto-tiller with a 5 horse flattie. 130000 series with a tank mounted, rotary choke Pulsa. Funny, I've been playin' with small engines since jr high (don't wanna even think about how long ago that was!), but this is the first rotary choke I'd ever seen. Looks like a pretty nice setup to use on a mini, I was thinkin' it was going to be a cable operated choke, you know, like on a lawn mower. Pretty cool. Anyways, I was reading (think it was on the Comp Cams site) about re-jetting for mini and go kart use. Any thoughts on this? It's not gonna be a race engine, and it's just gonna run on pump regular, but it never sucks to have a little more oomph than stock. There's a guy with throttle conversion kits on Ebay for five bucks, probably gonna do that. Clean the screens and tubes, give it some new gaskets and a diaphram. Everything else looked good. So, any ideas about jets, or any other tips, tricks, or mods?