ok taking off the air box where would you start with the mian jets way up high or just a lil bit over stock? if anyone knows something its greatly apricateed will be staring next week to mess with jetting 2005 kfx 400
ok here #1 read the damn manual that the jets come in duh lol
kfx 400 sucks; get back to work on the eiger
no 4x4 suck lol kfx much better and alot more fun to ride
Does it have an aftermarket pipe? Stock pipe? Baffle taken out? K&N or foam filter?
esr air box elimination and got baffle taken out and power tip put on for now
the k and n style filter with the outa wears on it
Here are a couple of links that might help.
http://www.z400central.com/invision/index.php?showtopic=80881&hl=JETTING+NO+AIRBOX+STOCK+EXHAUST+BAFFLE
http://www.z400central.com/invision/index.php?showtopic=39000&hl=JETTING+NO+AIRBOX+STOCK+EXHAUST+BAFFLE
id go up 10 on the main jet and call it good. all you need to do is run the thing wot, if it pops, its lean, if it winds out fine, your ok. i doubt you changed anything enough to need to play with the needle, but if so, thats something you will have to get a feel for.
i got the dyno jet jet kit so i can put the new needle ad stuff out of it adjustable fuel screw you all think hats good idea? and thank you all for the help looks like i would be around 150 or up main jet and 3 or 4 on needle it should be good ill keep u all posted on the prog
Quote from: 4x4Matt on October 05, 2008, 01:51:33 PM
i got the dyno jet jet kit so i can put the new needle ad stuff out of it adjustable fuel screw you all think hats good idea? and thank you all for the help looks like i would be around 150 or up main jet and 3 or 4 on needle it should be good ill keep u all posted on the prog
I have a friend with 2 Z400. They both have a closed airbox with just the snorkle removed. They both have a Yoshimura slip on. He is running a 150 in one and a 152 in the other. I think you would be closer to 160.
Remember dyno jets are different than stock ones.
Width------Keihin # -- DynoJets # -- Mikuni #
0.0350---- 92.5--------- 92----------- 86.3
0.0360---- 95----------- 94----------- 88.1
0.0370---- 97.5--------- 96----------- 90.0
0.0380---- 100---------- 98----------- 91.9
0.0390---- 102.5------- 100---------- 93.8
0.0400---- 105--------- 102---------- 95.6
0.0410---- 107.5------- 104---------- 97.5
0.0420---- 110--------- 106---------- 99.4
0.0430---- 112.5------- 108--------- 101.3
0.0440---- 115--------- 110--------- 103.1
0.0450---- 117.5------- 112--------- 105.0
0.0460---- 120--------- 114--------- 106.9
0.0470---- 122.5------- 116--------- 108.8
0.0480---- 125--------- 118--------- 110.6
0.0490---- 127.5------- 120--------- 112.5
0.0500---- 130--------- 122--------- 114.4
0.0510---- 132.5------- 124--------- 116.3
0.0520---- 135--------- 126--------- 118.1
0.0530---- 137.5------- 128--------- 120.0
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
0.0870---- 222.5------- 196--------- 183.7
0.0880---- 225--------- 198--------- 185.6
0.0890---- 227.5------- 200--------- 187.5
basically follow dynojets instructions for stage 1 accept for their main jet recommendation becasue it is for the lid being on. put the dynojet clip in on the 3rd clip, turn the air/fuel screw 3.5 turns out from all the way down. and id probably go with something in the 135-140 range for the main jet. and then go from their. if you put a 140 in and it feels to be a bit rich, you could always take the end cap off your exhaust and it may be enough to get it right on the money.
my end cap is hollowed out its just a crome tip with like 3 inch outlet no screen or nothing lol shots a flame out it now if i am on gas real hardthen get off it just cut fenders today my parts shoul d be in soon ill be messing with it this weekend
Quote from: 4x4Matt on October 06, 2008, 12:49:21 AM
my end cap is hollowed out its just a crome tip with like 3 inch outlet no screen or nothing lol shots a flame out it now if i am on gas real hardthen get off it just cut fenders today my parts shoul d be in soon ill be messing with it this weekend
with no endcap, and no airlid, id say a 140 main jet should be about right. when you get your jet kit, you could probably just folow the stage 2 instruction which are for a pipe and intake and then instead of using the 150 main jet that they recommend, go with a 140.
i got no box not just no lid
Quote from: 4x4Matt on October 07, 2008, 01:33:14 AM
i got no box not just no lid
same thing as far as jetting, only difference is you have to clean your filter every ride lol. i never really understood having no airbox. i built my uncle a blaster with a biger carb and ran it with no box, becasue i couldn't with the 34mm carb, and it was just kind of impractical.
its all about looks my freind lol ;) no just kiddin look at race cars they run filter right on top of carb why not have a restricted box or snorkle around it more air plus more fuel equel more power ;D plus it makes me keep the bike out of mud and water i always get looked at funny when its covered in mud lol
Quote from: 4x4Matt on October 07, 2008, 01:29:05 PM
its all about looks my freind lol ;) no just kiddin look at race cars they run filter right on top of carb why not have a restricted box or snorkle around it more air plus more fuel equel more power ;D plus it makes me keep the bike out of mud and water i always get looked at funny when its covered in mud lol
lol, race cars have a hood and fender wells. the air is there either way, its just a mater of if you want aitr out of a shielded box, or dirt mixed with air flinging off of your tires lol. im just kiding with you tho, open filters are fine. id just rather a box for when its wet out.
yea its all good
ok i got the lrd complete system to add to my bike now.
my jetting is already 3rd clip on needle
160 main jet
and fuel screw is out 3.5 turns
i have dyno jet jet kit how much more will i have to go up on the main you think 165 or 170?
i got header and new pipe to be put on thanx agian or the help