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jelrod05
08-24-2009, 09:53 PM
i have a stock 400ex stage one hot cam k and n air filter, outerwears pre filter, drd slip on at about 600 ft abpove sea level

I sm at 158 main, needle 3rd clip from top,42pilot 2 1/2 turns out on air fuel screw. sound close.
honda400ex2003
08-24-2009, 10:03 PM
sounds about right, maybe a bit rich on the main. maybe a 155 would be a bit better how does the plug look? i ran a 150 at 1500 ft with my t-4 slip on and k&n so you should be right around perfect for that low. steve
jelrod05
08-30-2009, 12:46 PM
the pllug looks like it is lean
honda400ex2003
08-30-2009, 12:59 PM
put in a 160 then and give it a try. steve
jelrod05
08-30-2009, 07:43 PM
i went to the 170 and it sputters at top end what do you think.
honda400ex2003
08-30-2009, 08:33 PM
then go back down one jet at a time until it runs best and the plug looks good. you are running rich now. steve
jelrod05
08-30-2009, 08:37 PM
should i move my needle down 1 notch.
honda400ex2003
08-30-2009, 09:24 PM
i wouldnt yet, get the main good first then you can fine tune the needle if you need to. steve
Honda#4
08-31-2009, 10:08 AM
Just remember the needle affects the main also.
jelrod05
09-15-2009, 09:50 PM
what needle position where you running at and what pilot and fuel air screw mixture for the procircuit when you were using the 150 main.
honda400ex2003
09-16-2009, 12:40 PM
i had the needle on the 3rd clip, the f/a around 3 turns out and a 38 pilot while i had my t-4 and k and n. this was with the air box on also. this was with the dj stuff but, i had a 138 dj, and the dj needle when i was running that stuff. that was the keihin conversion for the 150. i tried to pm you back last night but your box was full. lol, steve