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02-03-2012, 03:01 PM
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#1 (permalink) |
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:::Z-250 Rider:::
Join Date: Oct 2008
Location: Carmi, IL
Posts: 430
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Jetting my setup
Alright guys I just bought Z455's 42mm non FCR carb for my build. I am trying to figure out a baseline of where I should start Jetting it. I have searched through the Jetting database and their are three others that have been running this carb. Here are their Setups. Z455 please fill in your blanks if you could.
1. Main - 172 Pilot - 48 Needle - HRC 3rd Clip Cams - Hot Cams (not specified on which ones) Size- 439 (Compression not specified) elevation - 4200 2. Main - 185 Pilot - 48 Fuelscrew - 3 turns Needle - 2nd clip from top Size - Stock Cams - Curtis Sparks Elevation - Sea Level 3. Z455 Main - 178 Pilot- 50 Fuelscrew-IDK Needle-IDK Size-455 12.5:1 Cams-OSHC Elevation- 4. Me Size - 434 with 12:1 Compression then Drze thickness base gasket Cams - NSHC Intake - ProDesign Exhaust - Full Trinity Stage IV Elevation - 387
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2003 Z434 April 2012 QOTM Engine- 434 BBK, JE 12:1, NSHC, Ferrea Valves, DRZ springs, DID 3/4 cam chain, Single layer base gasket, 42mm 450r carb non FCR, EBC Clutch, Stage IV full exhaust, Spectre Intake, K&N with outwear |
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02-04-2012, 10:07 AM
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#2 (permalink) |
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:::Official Spammer:::
 
Join Date: Jun 2006
Posts: 3,390
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Start out with a 175/45 setup. You've got a similar set up to mine, at similar elevation. Mine is pretty much spot on that way. Fuel screw is 2.5 turns out. On the 3rd clip.
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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, 10:11 AM
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#3 (permalink) | |
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:::Official Spammer:::
Join Date: Feb 2008
Location: PA
Posts: 3,247
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Quote:
__________________
2006 LTR450
Engine Mods: Yoshimira Cherry Bomb - RS-5 Full Exhaust - Inspection Plug Choke B/O Nut - Start Button JE Piston Suspension, Steering & Chassis: Flexx Bars w Turner Clamps - Precision Damper - Tag Skid Plate Powermadds - LT Fox Evol w FuelATV A-Arms - Fox Podium Rear Pro Armor Grab Bar - IMS Roll Nerf + Heel + Bumper Misc: DID X-Ring Chain - Sprocket Guard - Frame Guards - ProDesign K/S Hiper Tec 3 - ITP Beadlock Rear Rims Parted Out: 2004 LTZ400 - September 2011 QOTM |
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03-15-2012, 02:47 PM
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#4 (permalink) |
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:::Z-250 Rider:::
Join Date: Oct 2008
Location: Carmi, IL
Posts: 430
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Well I decided to start off with a 175 main and 48 pilot and it is popping alot on decel so it is lean right? I know a leak in air flow can cause it to go lean. I have heard what sounds like a pulsing whisttle. I have checked all connections(on intake side I used brake clean to check) and can't find a leak anywhere. I can't even pin point where the noise is coming from. Does the 04 05 450r carb whistle like the FCRs? any ways what are you opinions I am currently running a 175main and a 48pilot. Here is a vid of the popping. I have read biggie saying to up the main and Chuck says to up the pilot. Who is right?
z400 jetting - YouTube
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2003 Z434 April 2012 QOTM Engine- 434 BBK, JE 12:1, NSHC, Ferrea Valves, DRZ springs, DID 3/4 cam chain, Single layer base gasket, 42mm 450r carb non FCR, EBC Clutch, Stage IV full exhaust, Spectre Intake, K&N with outwear |
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