First iteration of my kart. Looking good!
Detail on the Komet vinyl for the front of the fuel tank. Found on eBay in great condition. Installed, but not without 50 layers of clear coat. I want to make sure it won’t get damaged!
Now for the carburator. When the motor was hooked up to the Margay, it was running on a single 27mm 3-Jet IBEA yellowpower carb, especially massaged by E.C. I liked the idea of the triple jets, but the engine was too big, I needed more carburator.
My only option was to find a 35mm carb, either a Mikuni or Tillotson, and run that. Or was it?
I ended up stumbling on ANOTHER IBEA Yellowpower on eBay that needed a ton of work. If one is not enough… How about two? Inspired by Bueller’s twin carb SUDAM, I was determined to make it happen.
Being a direct drive, traditional twin carb setups would get in the way of the engine sprocket. So first, I would need to fabricate a 2-to-1 intake manifold. The victim was this intake manifold for a 40’s Royal Enfield…
… But was you probably noticed by now, the carb bodies would end up being on each other’s way. Here comes the angle grinder, and the aluminum soldering…
1st iteration of the finished product:
That side of the motor is a pretty dynamic area. The manifold is connected to a rubber boot, that is then connected to the motor. This helped isolate most of the bounces and vibrations, but it still vibrated enough that the carburetors cracked and separated slightly after my first race.
Thus I went through the process again. This time I’ve machined the carbs more, opening up the gap between them, while also focusing on soldering the large gaps behind the carburetors. I’ve used 2-part reinforced epoxy putty (which creates a joint with a bit more flexibility) to help dampen the areas around the solder points. Finished it by painting with fuel resistant epoxy paint. The result is cleaner looking, and more functional:
The triple fuel pump setup was an idea from that same guy who mentored me through the build. It seems to be a popular setup with the circle track guys, cheap insurance for in case you loose pop-off in one or both carbs.
Vacuum pulls from the crankcase to a vacuum block, which then distributes vacuum between the 3 pumps. Pump is a vintage Mikuni, but the vacuum block is a shameless modern OBX tuner car piece. 
