This is my first post on the site, and im hoping somebody can help me out....

I just bought a new keihin pwk28 for my 2000 blaster. the blaster drivetrain upgrade are as follows:

-cylinder port and polish
-high compression head(gasket kit)
-61mm (1mm over) weisco piston
-raised cylinder base(exaust port timing)
-boysen power reeds
-0.5" reed spacer
-fmf expansion chamber and muffler
-k&n air filter w/outerwear
-stock airbox lid removed
-oil injectors blocked off

i usually ride at altitudes between sea level and 5,000 ft...
anybody have any suggestions on the jetting of the new carb??? thanks.

 

i running a 140 main and 42 pilot, I got porting , bumped compression, advanced ignition, clampon K&N filter, but still have stock exhaust. You might try a 145 to 150 since you have aftermarket exhaust and Boysean Reeds

 

thanks boomer you are the man.. i just ordered the 145 and 150 main jets, and the 42 and 45 pilots. i should be able to find a good combination for this bike with these jets, thanks again..