26mm carb set up on malossi 210

[handofdave]

hi all,
can anyone give me an idea on jetting for a 210 with a spaco 26mm carb,jl exhaust,
have tried the 130 main supplied with kit with the b3 and 120ac but plug runs white,any suggestions? :wtf:

[C*NTSPEED]

ditch carb go to 24mm standerd carb with 132 main and be3 atomiser

[Bofs]

If it`s running white then she`s gonna cook. Go big and work down, a 135 will be about right but start bigger and keep plug-chopping.

[paddyfitz]

I had fuel supply issues with those 26mm carbs as well.
I think I got my hands on a Cosa float chamber cap - the needle was a 5.2mm instead of the normal 4.5mm & I think the aperture that it sits in had an inside diameter of around 2mm. More gas at a faster rate via the float chamber is the idea there (make sure your fuel line isn't too long either).
I've also seen people stack three float chamber gaskets to increase the chamber volume. I think DRT makes a metal one with that in mind.
If it ain't fuel supply or timing - I've had to resort to going way rich on jetting. 120 air jet & be4 atomizer just to get it to behave even with a 135 main. I've had to go as high as a 142 for some... Those JLs are nice, but they can be a fuel toilet once you get into the power...
Best of luck!

[handofdave]

is the be4 richer or leaner than the 3?

[paddyfitz]

Richer I think. Look at the amount & size of the holes. I've been told fewer/smaller = richer. Seems to be true from my experience.

[OzOAP]

Never had any joy with 26mm SI's

[cit205]

Same here.

[rapido230]

ditch the 26 u better off with a normal 24, get a polini venturi adapter with air filter to replace the vespa airfilter and hose, then jet as appropriate