400ex jets

[HondaEXrider22]

OK Want to get this right. I have an 03 400ex with WB Eseries pipe, and the WB airfilter with no lid. What are the poper jets to make this beast run right?(lol)

TIA

[HondaEXrider22]

Bump plz help i need the answers

[RiderTRX400ex]

there isnt an exact answer, factors like elevation and temp make the jetting tough. i have the WB e series and open airbox and i am at a 165 main jet, and a 42 pilot jet.

jets are fairly cheap, and are a must to change whenever adding air or flow to a motor.

[wcbomb]

slip-on = try 155 kehien, move clip down 1 notch,and for better cold weather starting 40 pilot.

[stc416rider]

every quad is different u just need 2 try different jets

[HondaEXrider22]

OK Thanks put in 160 and am getting awesome throttle response.


thanks