bikersayings.com Posted September 9, 2011 Report Share Posted September 9, 2011 (edited) I am looking to get some jetting advice before I start my new motor. I just bought the 28mm pwk's and I want to make sure that I'm in the ballpark with correct jetting. I have a once bored stock cylinders (.50mm) with a new 4 mil crank and 115mm rods. Any jetting suggestions would be appreciated. Edited September 9, 2011 by bikersayings.com Quote Link to comment Share on other sites More sharing options...
LS3 Machine Posted September 9, 2011 Report Share Posted September 9, 2011 I am looking to get some jetting advice before I start my new motor. I just bought the 28mm pwk's and I want to make sure that I'm in the ballpark with correct jetting. I have a once bored stock cylinders (.50mm) with a new 4 mil crank and 115mm rods. Any jetting suggestions would be appreciated. With 28s it kinda depends on which needles u have, but I'd try 48/150 for starters. Edit: I should have paid closer attention to your setup. Since you are Porrted/4mil, I would say more like 50/155. But the 28s behave a little defferent depending on needle. The stock PWK 28 needles seem to need a more lean main and pilot, while the 68Js seem to like more fuel. Quote Link to comment Share on other sites More sharing options...
nastyracing Posted September 9, 2011 Report Share Posted September 9, 2011 I have very similar set up smaller port timings w booste ports added . Everything else same u got I'm at sea level using jjh needle 4th position 52 pilot 168 main. Bike plug chopped 165 very cleanly but running hard a tad rich. I am still currently running air box hope that helps. Quote Link to comment Share on other sites More sharing options...
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