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02-03-2012, 09:47 PM
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#1 (permalink) |
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:::Rookie Rider:::
Join Date: Feb 2012
Location: Moosic,PA
Posts: 6
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04 z400 sputters when i give it gas, Help!
I have an 04 z400 with a lexx mxe slip on and k&n air filter with the lid on. I rejetted the main to a 152 with a dyno jet kit. i changed all the other jets except one to 140s. It sputters out in every gear except first. Should i put a bigger main jet in? or any other ideas?
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02-03-2012, 10:18 PM
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#2 (permalink) |
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:::Get a life! You're over 5000 posts:::
 
Join Date: Oct 2008
Location: Southern California
Posts: 5,245
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what do you mean by "I changed all the other jets except one to 140s"?
If it sputters when you first give it gas it isn't the main jet. Did you put the needle in that came with the kit and did you adjust the fuel screw?
__________________
2005 Z-400 Mine January 2011 QOTM 2004 Z-400 Brad'Z October 2011 QOTM http://www.suzukicentral.com/forums/...tm-winner.html 2004 Z-400 Wife's 1996 Sandsprite IV (sandrail) MINE Sponsors: Coors Light.............I sponsor them  !Life is tough...........it's tougher if you're stupid. |
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02-04-2012, 08:53 AM
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#3 (permalink) |
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:::Official Spammer:::
 
Join Date: Mar 2006
Posts: 3,053
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first thing would be to take the lid off the air box
__________________
03 ltz400,95.5bore,+5crank,P&P,13.7:1,JE piston,spacer plate,RHC +1 intakes valves,RHC #208in&187ex cams,DRZ manual decomp,DID cam chain,no air box,Sredrum TB 42mm FCR,RAT stack,WB fuel screw,EMN needle,quick shot,06 clutch 450r drive plates w/trx400 ex springs,C2HB,ex thumber,trx450r air boot, Barker Performance pipe, trailteck flywheel,dynatek,nerf bars,450r shocks, nerf bars,+4 swinger,lowered front & rear |
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02-04-2012, 09:08 AM
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#4 (permalink) |
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:::KFX 400 Rider:::
Join Date: Mar 2011
Location: Pittsburgh
Posts: 917
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You really didn't change much from stock by just adding a K$N and a slip-on. If anything put the jets back to what they were stock. Maybe up the main by one and play with the fuel screw. Or take that lid off and leave the larger jets. The only jets you should change is the main and pilot.
__________________
2004 KFX400, 12.2:1 Wiseco, HMF full exhaust, FCR-39 (170 M/ 42P/ 40L/ NCVQ, DRZ-E boot w/ compact head-stay), OSHC's, K-W valves w/ drz springs, Dyna Fs NP, Raptor Petcock, Wiseco cam chain, 400ex boot, Oversized clamp on UNI/K&N no lid, DRZ-E Base, DRZ Flywheel, LTR450 Front Shocks, blob-less ProTaper Contour bars (ATV High) w/ hot-start reverse, odi grips, Tusk nerfs, Full skids, 14/40, (R) Holeshot ITP HD (F) Rzr2, Port-N-Polish by me. |
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02-04-2012, 11:01 AM
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#6 (permalink) | |
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:::LT500 Rider:::
Join Date: May 2011
Location: Westchester NY
Posts: 1,245
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Quote:
__________________
2003 Suzuki Z400 - SOLD  Fully Worked & Race Ready, '98 Yamaha YZ125 - My New Toy 
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02-04-2012, 11:16 AM
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#7 (permalink) |
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:::Official Spammer:::
Join Date: Jun 2006
Posts: 3,390
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You're probably running rich, a slip on and a closed lid won't do much to change your jetting. Go back to stock jetting and see how it runs. What's your elevation?
__________________
05' Z434 12.5:1CP,Full Yosh TRC,FCR40,175/45,Rat Stack,Dyna Programmable,AMR Coil,KW Valvetrain,536/540 Web's,DID Tchain,PWR Radiator,Raptor petcock,Gunnar Kill,Elka S3 Front+Rear w/link,Roll+1 Stem,GPR Stabilizer,SL Hyd.Clutch,Tag T2,LSR+3 Arms,Burgard+1 Swinger,Quadtech Rad Shrouds,Supersprox 14/40t,UM Air Box,YFZ Calipers,SS Lines,PA Bumper,Asv's,Roll Nerfs/Heels/Pegs,LSR Axcalibar,Douglas G2 Beadlocks/Razr's,Hid,YFZTail,Pwrmadd's,TT Vapor+Dash,CV4's,RickyStator. July 2011 QOTM 
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02-04-2012, 11:18 AM
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#8 (permalink) |
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:::Get a life! You're over 5000 posts:::
Join Date: Oct 2008
Location: Southern California
Posts: 5,245
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If you got the dynojet kit...........why didn't you just follow the directions.
The only jet you touch is the main jet. It's the one with the little plastic cup on it. The 152 may be ok.......but if you messed with anything else that is your problem.
__________________
2005 Z-400 Mine January 2011 QOTM 2004 Z-400 Brad'Z October 2011 QOTM http://www.suzukicentral.com/forums/...tm-winner.html 2004 Z-400 Wife's 1996 Sandsprite IV (sandrail) MINE Sponsors: Coors Light.............I sponsor them !Life is tough...........it's tougher if you're stupid. |
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02-05-2012, 11:44 AM
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#10 (permalink) |
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:::Official Spammer:::
Join Date: Jun 2006
Posts: 3,390
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The directions tell you to change the main jet, not any others. You didn't do what the directions said if you changed "all the other jets".
Help us help you, and be specific!
__________________
05' Z434 12.5:1CP,Full Yosh TRC,FCR40,175/45,Rat Stack,Dyna Programmable,AMR Coil,KW Valvetrain,536/540 Web's,DID Tchain,PWR Radiator,Raptor petcock,Gunnar Kill,Elka S3 Front+Rear w/link,Roll+1 Stem,GPR Stabilizer,SL Hyd.Clutch,Tag T2,LSR+3 Arms,Burgard+1 Swinger,Quadtech Rad Shrouds,Supersprox 14/40t,UM Air Box,YFZ Calipers,SS Lines,PA Bumper,Asv's,Roll Nerfs/Heels/Pegs,LSR Axcalibar,Douglas G2 Beadlocks/Razr's,Hid,YFZTail,Pwrmadd's,TT Vapor+Dash,CV4's,RickyStator. July 2011 QOTM
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