byro12 Posted September 15, 2009 Report Share Posted September 15, 2009 Jet size: 155 needle size: N64A clip: 2nd from top air screw: 1 1/2 turns out pilot: 45 I'am having hard time trying to tune my pwk 28's on my stock motor. What i have for modifications are: v-force 3, k&n filter. I'm just above sea level(about 3-5 meters) and average temperature is between 5-10 degrees celcius. I bought the carbs from vito's and they told me they are pre-jetted. But when i installed them they were bogging out past half throttle. This is how they were before i changed the settings: Jet size: 160 needle size:N64A clip: 3rd from top air screw: 1 3/4 pilot: 45 It has no trouble starting up and idleing.i just don't seem to quite figure this out.When i changed it to how it shows at the top screen, it bogged out past 3/4. Does anyone have a good idea to what is going wrong? And how do you know if it's getting too much or too little gas? Can a prfessional help me out here, or at least give me an idea? thanks for your time and help, greatly appreciated. Quote Link to comment Share on other sites More sharing options...
Mjv420 Posted September 15, 2009 Report Share Posted September 15, 2009 If you are bogging from 3/4 to wot you are rich on your mains using the 160 jets, you would want to go down smaller to the next size. Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted September 15, 2009 Report Share Posted September 15, 2009 I set them up with a JJG or JJH needle. 162-165 mains, center clip position on needle. 48-50 pilot, air screw at 1.5 turns out. Quote Link to comment Share on other sites More sharing options...
hercalmighty Posted September 15, 2009 Report Share Posted September 15, 2009 What pipes are you running? You say your running a K&N, is that in the air box or pods? Are you running the air lid? When I had my stock ported motor with T6's I was at 162 main, N68A needle in the middle, 45 pilot. I tried running running the carbs with the airlid on and it just didnt seem to want to run right (I tried mains from 148-165). As soon as I took the air lid off it ran like all hell. Quote Link to comment Share on other sites More sharing options...
byro12 Posted September 19, 2009 Author Report Share Posted September 19, 2009 What pipes are you running? You say your running a K&N, is that in the air box or pods? Are you running the air lid? When I had my stock ported motor with T6's I was at 162 main, N68A needle in the middle, 45 pilot. I tried running running the carbs with the airlid on and it just didnt seem to want to run right (I tried mains from 148-165). As soon as I took the air lid off it ran like all hell. im using stock pipes right now and im using a k&n filter w/outerwear in the stock box with the lid on. i just bought some fmf gnarlys to go with the filter. i never thought of running it with the lid off,maybe she needs the lid off. wow! thanks guys, for your help, much appreciated! Quote Link to comment Share on other sites More sharing options...
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