Jetting help with new 28mm D slides

[slow2_2]

Hello,

I just purchased some Koso 28mm carbs. which are just like the Keihin PWK's. The carbs. came with 140 main jet, 60 idle jet, and a 40 power jet. I am running FMF Fatties, stock bore with Prolite pistons, Weisco reeds, timing advanced at 4 degrees, 1/2" reed spacers, and a K&N. Are these jets a good place to start, or what should I start with.

 

Thanks

[FredMW]

Couple of questions, what's your elevation and what's a power jet?

[slow2_2]

Couple of questions, what's your elevation and what's a power jet?

 

Elevation is 1000 ft. And a power jet prevents leaning out during extended full throttle running in 2-stroke engines. Here is some information on the carbs. http://dratv.com/allchrome28.html

 

 

Thanks

[jbooker82]

Most People that run Keihin carbs run 158-150 main. And 45-48 pilot jet. You dont need those power jets. The only people that run those are the alachol people. Dont rely on that power jet to suply fuel. Jet the carbs first then use the power jet to add alittle fuel if you need it.

[Millsy240]

Hello,

I just purchased some Koso 28mm carbs. which are just like the Keihin PWK's. The carbs. came with 140 main jet, 60 idle jet, and a 40 power jet. I am running FMF Fatties, stock bore with Prolite pistons, Weisco reeds, timing advanced at 4 degrees, 1/2" reed spacers, and a K&N. Are these jets a good place to start, or what should I start with.

 

Thanks

 

 

How have you liked the carbs. I have been looking at them but I am not sure if I should go with the oko or these? Any suggestions would be appreciated.

 

Thanks