Don't know what the Walbro runs, but the STHIL carbs are the same thing, $20-50 rebuild kits at yer local ace hardware for about $12. I've tossed the idea around, but not sure about it yet. One disadvantage I see, is that if you do lay the bike down, it'll keep running... Not sure what to do with the pulse line, but, if you find one the bolt holes line up on, you can skip the intake manifold completely, which might help up top. They are really easy to tune though.