What main jet ?

[pim123]

What number of main jet do i use when using open carbs and open pipes ?
I take it it will be rather big, like 140 or so ?
Anybody any experience with this ?

 

[pim123]

sorry, didn't use the search first ... will find the answer that way, sorry

 

[angus67]

if you didn't figure it out yet, post what motorcycle you have, year, make, stock, modified. We don't even know what kind of bike you have. Cushman? Busa? Xs650?
The garage is open to all makes and models.

 

[I am Carbon]

Also What carbs are You using?

 

[pim123]

I am building a bobber out of a 1981 stock XS650, using standard 34mm Mikuni's and planning using Gordon Scott pipes

 

[I am Carbon]

Try 137.5 then

 

[pim123]

Ok, tnx !