Well sounds like im gona have to try one of those rings. or two of them in my case lol. I know there is a serious difference in the one ring and two ring set up as far as compression.

Try this like for the carbs. then click the series and select a carb number you want. it should have the venturi size somewhere.

http://wem.walbro.com/walbro/family2.asp

As far as honing what i use with some success is a sandpaper flapwheel that is just a touch bigger than the bore. Flapwheels can be bought from most any supply but i get mine from mcmaster carr. Its aboutht the only thing your gona be able to hone with and be able to hone over the transfer ports. Try this and look for the dia you want. remeber needs to be a little bit larger.
http://www.mcmaster.com/#flap-wheels/=ufyp1


Thanks for the offer on the shim stock but a stock valve is .006. I was hoping to get some .003 stock.


Here is one with a 12.7mm venturi
http://cgi.ebay.com/Walbro-WT-466-di...d=p4634.c0.m14
here is the parts dia on this one.
http://web.archive.org/web/200504111...rtnum=WT-466-1

this one has the 11.11 mm venturi
http://cgi.ebay.com/Walbro-WT-600-ca...d=p4634.c0.m14
here is the parts beakdown
http://web.archive.org/web/200710030...rtnum=WT-600-1

I got my carb from this guy. his price is the best i have found and his shipping is very fast. I would recomend him at any time.

I bought a 17-8 prop from a club member for 5 bucks. this should give me a good idea if im against a rpm limiter. thanks for the idea diceco