Jetting help please

[ryusinski]

I have a banshee cub that I'm building and I'm looking for a good starting point with jets.

Mods:

-68mm bore cub cylinders (stage 2 port work done)

-4mm crank

-23cc domes

-35mm pwk carbs

-CEL needles

-chariot intake with no boost bottle

-vforce 3 reeds

-cpi small bore in frame pipes

-adjustable timing plate

-cfm aluminum air box

-2 k&n pod filters

..... pretty sure that's all of the important stuff that can effect the jetting

 

I was told that,the CEL needles were used in a lot of 421 cubs so I just grabbed them. My house is at 1600ft elevation in PA

 

Any help appreciated

[ryusinski]

start at 50 pilot 1.5 Cel mid clip 180 main. you WILL be rich.. but always safer and easier to jet down from there

 

odds are you will land around 48 cel mid and 165-170 but I wouldn't start with that imo.

Ok I do have a 50 pilot on hand to start with but someone else suggested a 152 main for this setup. Way too lean?

[trickedcarbine]

Start fat and work down.

[ryusinski]

it really depends on your motor among other things.... i'd hate to see you burn it down while tuning... starting too fat isnt good but way easier to notice over a lean condition....

 

 

I wouldn't start at 152.... id start at what I recommended and work my way down.... I don't hear of too many PWK's running 152 mains to begin with.

Ok I'll pick up a few new jets and start from there. Thanks again

[sleeper06]

152 is a no go you'll prob end up 165-170 48 pilot needle 4 th clip

[sleeper06]

Not really I like the 4th clip position on most motors I build ,it leaves the needle out of the pocket a millisecond longer letting just a tad more fuel charge into the cylinder for the next throttle blip. Just my whacked out theories

[sleeper06]

Lol I'm very diffrent