be cool if kehien made a 45 or 48. their standard sizes dont cut the mustard on big singles.
I think there is a Mikuni VM44mm carb. Its a roundslide though. And you could get it bored, maybe? Probably to a 46mm. I think there is a guy on QHQ that runs one on his alky lt500 bike. Carzzaco500 i think his name is.
Lectrons are great until they start overflowing then you will pull your hair out trying to get them to stop. Usually they are fine while you warm the bike up at the trailer but start overflowing as soon as you start to pull to the starting line lol. Both carbs work fine its just personal preferance in my opinion. Strangly some of the fastest big twins and triples in the country run the 39 keheins.
This is going to sound bad, but I tune whatever I have to work with LOL...
But if I had my choice, it would be
For alky: (1)Lectron, (2)Mikuni, (3)Keihin.
For gas I would take any of them
I only dislike the Keihins simply for the fact that the dump tubes are not replaceable. Once they get worn out, especially on gas you simply have no choice but to toss them, if you want to tune the bike correctly. The Mikunis give the ability to infinitely change the needle/tube combo's and the Lectrons pretty much the same way. If you have the right needle to start with then it's wayyyy too easy. The simplicity of Lectrons makes guys overlook the easy way and overthink it.
two star screws removes the housing that the dump tube is in on PWK carbs.
so why do some think you can't change them.
the housing holds the main jet/dumptube,and pilot jet....and its removable