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12-24-2011, 05:49 PM
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#1 (permalink) |
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:::Rookie Rider:::
Join Date: Aug 2011
Posts: 25
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jet sizing
i have a 04 ltz 400 with hot cams airbox lid off and fmf powercore 4
it has a hesitation at take off like until 1/4 throttle just changed to the main jet to 124 dyno what jet sizes would you recommend like pilot jet and slow jet |
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12-24-2011, 07:02 PM
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#2 (permalink) |
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:::Post Whore:::
Join Date: Aug 2010
Location: Derby, KS
Posts: 2,108
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You have a stock carb? Last I remember there isnt a slow jet? Unless you mean pilot. Do some research on mikuni carbs and how they work if your not sure and check the stickied jetting thread posted here.
__________________
2006 Lt-Z434 Trinity IV Full Exhaust/OSHC/FCR39 w/AP Safety Wired/ Velocity Intake/Odi Rogue Grips/AC Nerfs Factory Suzuki Heel Guards/Durablue Rear Linkage +2+1 A-Arms 
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12-24-2011, 10:56 PM
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#4 (permalink) |
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:::Official Spammer:::
 
Join Date: Jun 2006
Posts: 3,399
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Check the jetting database.
__________________
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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12-25-2011, 01:47 AM
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#5 (permalink) |
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:::LT500 Rider:::
 
Join Date: Feb 2011
Location: Holt, Mo
Posts: 1,742
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elevation would be helpful too, but there is alot of usefull info stickied on here. I always try to go there first..
__________________
03 Z400, Fly Aluma Steel Bars, Blob removed, fly kill switch, ASV levers, Power Madd hand gaurds, MQ park brake block, DG O-series pipe with Curtis sparks header, Pro Armor full nerfs with heel gaurd, CST Ambush Front and Rears, GBC Sand shark and shark fins on douglas blue label, No lid,pro design air filter, no snorkel, 6000k HID conversion, procom cdi, 06 ressie shocks, FCR39 tuned. |
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12-25-2011, 10:35 AM
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#7 (permalink) |
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:::Get a life! You're over 5000 posts:::
Join Date: Oct 2008
Location: Southern California
Posts: 5,264
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Your pilot could go up to a 25 but you could also open up your fuel screw some. Don't touch the other (slow?) jet. The main jet should be way bigger like a 150 dyno but should have nothing to do with your hesitation in the first 25% of throttle.
Database has every scenario in it.........what's not to understand. Mods and jets. Here's some info for you. Check out google sometime, it's pretty cool  http://www.dynojet.com/images/pdf.gif Quick Jetting Guide Well the dynojet link don't work but if you go to their site and find the instructions on 03-04 Z400 you will see it. As for the main at 150 might be big as I just realized that you only have a slip-on. Either way a 124 is too small in my opinion..........unless you put the lid back on.
__________________
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. Last edited by spize909; 12-25-2011 at 10:53 AM. |
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12-25-2011, 11:28 AM
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#8 (permalink) |
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:::Post Whore:::
Join Date: Aug 2010
Location: Derby, KS
Posts: 2,108
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Wait a second...I just realized something. It wont help you really at all in the first 25% with your hesitation, but if your running a 124 dynojet for your main, that is about a 115 mikuni jet. Stock IIRC for the main is a 130 mikuni jet. You went way smaller....you need to go larger.
__________________
2006 Lt-Z434 Trinity IV Full Exhaust/OSHC/FCR39 w/AP Safety Wired/ Velocity Intake/Odi Rogue Grips/AC Nerfs Factory Suzuki Heel Guards/Durablue Rear Linkage +2+1 A-Arms
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12-25-2011, 01:24 PM
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#10 (permalink) |
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:::Get a life! You're over 5000 posts:::
Join Date: May 2007
Location: Louisiana baton rouge
Posts: 5,953
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Try changing the needle height. Go down one slot on the clip.
__________________
OCTOBER 2009 QOTM KFX470 (The Black beast) -web cams custom grinds, titanium valves,cv4 springs -dyna programmable -4" extended swinger, rad aluminum axle -ported head (by me)(please do not pm me about head porting. Thx) -cp 94mm stroker piston, hot rods +5mm stroker -44mm straight bored fcr carb, Fci intake -powder coated everything |
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12-25-2011, 02:08 PM
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#12 (permalink) |
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:::Get a life! You're over 5000 posts:::
Join Date: Oct 2008
Location: Southern California
Posts: 5,264
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You'd have no problem leaving it stock. If you want to change it go to a 25
__________________
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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12-26-2011, 12:46 AM
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#13 (permalink) |
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:::Ozark 250 rider:::
Join Date: Nov 2011
Location: New York
Posts: 370
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I was/iam runinnin a 155 main dyno/fmf with 2.5 turns on the screw mid clip on the needle with different spring....lil rich but pulled like a S.O.B....no lid,modded stock exhaust,and K&N...That was @2300--2500 ft elevation in the winter time as i only Ice race on the 155 went to a 150 for warmer temps always ran great!!....never touched pilot or screw only main as temps changed,Hope this helps as I am about to get into the FCR tuning which is a whole lot more involved than the basic MIC........GOOD LUCK!!
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