I have a 2005 400ex and it has a K&N air filter and a white brothers e series slip on and i run with air box lid off and at an altitude of about 1100 and i have a dynojet jet kit and it shows that i should run a 170 main but that seem high to me. What does everybody else run? thanks

 

im running a 155/42 kehein. have slip on,k&n w/drilled lid and removed choke.
1Width------Kehein # -- DynoJets # -- Mikuni #

0,0540---- 140--------- 130--------- 121,9
0,0550---- 142,5------- 132--------- 123,8
0,0560---- 145--------- 134--------- 125,6
0,0570---- 147,5------- 136--------- 127,5
0,0580---- 150--------- 138--------- 129,4
0,0590---- 152,5------- 140--------- 131,3
0,0600---- 155--------- 142--------- 133,1
0,0610---- 157,5------- 144--------- 135,0
0,0620---- 160--------- 146--------- 136,9
0,0630---- 162,5------- 148--------- 138,8
0,0640---- 165--------- 150--------- 140,6
0,0650---- 167,5------- 152--------- 142,5
0,0660---- 170--------- 154--------- 144,4
0,0670---- 172,5------- 156--------- 146,3
0,0680---- 175--------- 158--------- 148,1
0,0690---- 177,5------- 160--------- 150,0
0,0700---- 180--------- 162--------- 151,9
0,0710---- 182,5------- 164--------- 153,8
0,0720---- 185--------- 166--------- 155,6
0,0730---- 187,5------- 168--------- 157,5
0,0740---- 190--------- 170--------- 159,4
0,0750---- 192,5------- 172--------- 161,3
0,0760---- 195--------- 174--------- 163,1
0,0770---- 197,5------- 176--------- 165,0
0,0780---- 200--------- 178--------- 166,9
0,0790---- 202,5------- 180--------- 168,8
0,0800---- 205--------- 182--------- 170,6
0,0810---- 207,5------- 184--------- 172,5
0,0820---- 210--------- 186--------- 174,4
0,0830---- 212,5------- 188--------- 176,3
0,0840---- 215--------- 190--------- 178,1
0,0850---- 217,5------- 192--------- 180,0
0,0860---- 220--------- 194--------- 181,9

 

I would. That's what DJ recommends. I had an EX with the same setup. Same exhaust and all. I ran the 160 thinking 170 was to big. I quickly switched to the 170 because I was lean. 170 was spot on. My bro got away with the 165 with a stock filter.

 

isnt the dynojet 170 the same as a kehein 190. that seems way big. maybe that chart is off. i found it on here. not sure.

 

ya that would seem huge...I got a 165 dynojet in it know and my exhaust should be here monday so I will do some testing with it and find out.