Jetting?

[Macs]

I started buying things for the buggy and then got to thinking. When doing engine mods I should rejet. I have been restoring vintage bikes and three wheelers for about half my life and part of changing a pipe, raising compression, aftermarket air filter etc involves rejetting but I have not seen anyone discuss this. So what's the scoop? Where can I buy jets?

 

[chevy1]

im sure you cant change jetting but you can change it out with bigger or smaller carb, and adjust the needle jets to set your high and low carb.

 

[Macs]

So these kinda follow the old rotax design. Where they are perm proxy set? I kinda figured this when I was trying to lean it out a bit and no matter what I did it was still a bit fat. The upgrades should lean it out quite a bit, so it might work out well. I haunt got into the carb yet but from the outside it does appear to be quite limited on its tuning options. I am a little worried about running it lean. Has anyone tried molding a dial a jet on these? I hate a carb without much tunability.

 

[Bill_G]

I think the needles (adjustable jets kinda) will do what you need from that carb, based on the amount of air that carb will flow. A better carb upgrade would be the Walbro 813.

 

[goldwing1800l]

have anybody ran the walbro 990 carb?