Full exhaust -no lid JETTING?

[440challenger]

Im at sealevel.

Stock 400ex motor with an open air box and a full yosh exhaust. Anyone know a ball park where i should be at with jetting? thanks!

[timsmcm]

160 to 172 each motor will be different start at the high end and work down

[Wheelie]

40 Pilot, and 155-160main depending on the air filter.

[B-rad D]

im run a 180 at 4000 feet

[JDMThoughts]

155 main jet, stock needle, stock clip, 45 pilot, and 2 turns out. That's where I set mine up and it runs very nicely.

[timsmcm]

please start out high jets are cheap and work down each machine is different if you have a machine that needs a little more fuel and you go with a smaller jet and cook your motor it can be costly

[JDMThoughts]

your a jersey boy too so you might be close to sea level like me. My town is only a few feet above it.