pilot jet

[trxex]

i am using a 40 piolt and my screw is at 3 turns.(see mods below)should i try a 42?.also does anyone make a flex screwdriver or a tool to get to the pilot screw to andjust it while on the bike.also even with a 160 main my plug dont show color on the porclian,w.o.t readings.i was reading carb tech info and it stated the pilot plays a slight role in w.o.t opperation

[Steve-o 400EX]

I have a 42 pilot and it helps it start easier because I took out my choke. Other than that i dont think it plays a big role in top speed, 67 mph is about where ur 400 should be if it is jettet right, a 42 pilot wont hurt it though.

[trxex]

steve-o thanks for all the info .your very helpfull.i was wondering tho .we have almost the same mods and i iam baffled at why u are using a 152 and mine a 160.my plug reads a tad lean.i have no vacum leaks.any comments

[Steve-o 400EX]

Long island is pretty much at sealevel right?? I think its because my altitude is a bit higher, i Am in PA an hour north west of Philly. I am actually a little rich at 152. But as long as ur plug reads okay then ur good. If it doesnt feel like its boggin when ur wide open ur not rich, i had a 155 and it would bog when i was wide open and i knew i wasnt goin as fast as it could so i stepped it down and now i can tell the difference.

[YZROOSTINYA]

155
4TH CLIP DOWN ON NEEDLE
42 PILOT

2.75 TURNS ON AIR

I LIVE 5 MINS FROM STEVE-O

[Steve-o 400EX]

Originally posted by YZROOSTINYA
155
4TH CLIP DOWN ON NEEDLE
42 PILOT

2.75 TURNS ON AIR

I LIVE 5 MINS FROM STEVE-O

Definately listen to him, he knows a lot more than i do. Actually he has given me a great deal of usefull information.