To Anyone With Aftermarket Exhaust... - Page 3 - Yamaha YFZ450 Forum : YFZ450, YFZ450R, YFZ450X Forums

ketchupYFZ450 · 10-17-2004, 02:01 PM

The pointy end. ;)

patboud · 10-31-2004, 06:17 AM

ESR pipe
ESR intake
cam mod
NCVQ needle
Vortex CDI

main jet #188
pilot #48
clips #4
2 turns
700 ft

That seem richer than most of here 8|
It was jetted on dyno

MTXracer36 · 10-31-2004, 11:29 AM

esr pipe
esr filter

175
45
4th clip nvcq (yz) needle
200-800

Deimos · 11-15-2004, 06:43 PM

Elevation- 100
Temp- 55

White bros. E2
no lid
K&N

Pilot jet- 45
Main Jet- 168
NCVQ needle- 4th clip
Fuel screw- 1.5 turns

ketchupYFZ450 · 11-19-2004, 11:09 AM

My new jetting specs after latest mods...
Hotcams
ESR intake
TC Exhuast
SRP CDI

50p
190m
5th clip NCVQ
1.5 turns on the fuel screw but still fine tuning.

I may even be able to go higher on the main but I don't have any higher main jets to test this theory.

540 Bogmonster · 11-22-2004, 12:39 PM

I run-----GYTR end can, YZ450F exhaust cam, alloy airbox+trx 250 air filters, 168 main 45 pilot 5 clip (yz450f needle) 2 turns. I am from the UK. BUT SHE RUNS FINE SUMMER WINTER what ever.

ChadJ99 · 11-23-2004, 01:20 PM

My '05 yellow/black YFZ is running with the GYT-R Titanium pipe and header (I know, the header is a waste, but I love the purple color it turns :) ). I also have the GYT-R intake/ filter.

Mainly ride Glamis...

Pilot #45
Main #168
GYT-R Needle 4th clip
Air screw 2 turns

400grl · 12-03-2004, 11:22 AM

STOCK SHORTY PIPE - no restrictions - stock header
ESR Intake kit w/ airbox intact but no lid
Cam Mod
Chandler, AZ.......

175 main jet
45 pilot
4th clip with dirtbike needle

This is jetted perfectly........ :rock

FAST1 · 12-17-2004, 09:37 PM

Stock bore/piston
cam mod
Jardine RT4 full system (no sparky)
GYT-R K&N with lid off
Location: GLamis

175 main
4th clip NCVQ needle
48 pilot
2 1/2 turns fuel mix screw

I have tried the 5th clip/175, 4th clip/178 and 4th clip/180 also.

Planning on sticking in a 50 pilot as a test next.

Never hurts to test even when you think your jetted perfect.

AKquadracer · 12-28-2004, 02:07 AM

diffrent octains changes engine and jetting settings too, i used 90 octain with my whitebrothers e2 slip on and ran fine, then i put in 100 octain and it started sputtering and acting wierd, then i put 90 back in and it was normal

PeteW · 12-29-2004, 06:30 AM

Leo Vince X3 FIM
Cam Mod
no air box lid

45PJ
JD Red #4
168 or 170 Main depending on the day
FS 1.5 turns

always run 98 octane fuel too

jhead · 01-03-2005, 03:57 PM

New 05 YFZ 450 special edition
Yoshimura TRS full system No. 2375500-SA (tri oval pipe)
NCVQ at clip postion 3
Main jet No.170
Pilot jet No.48
mixture screw at 2 3/4 turns
pro flow foam filter with airbox mod
removed airbox lid

Fontana CA

(runs great!) Yea Buddy! :rock

Fixxxer27 · 01-03-2005, 05:51 PM

2004 YFZ450 .
CURRENTLY RUNNING:
STOCK HEAD PIPE
FMF MID PIPE
FMF TITANIUM 4 Muffler
FMF JET KIT: 142 MAIN 42 STOCK PILOT
FMF NEEDLE ON #5 CLIP
CAM MOD
AIRBOX LID OFF
SOON TO BE ADDING A K&N PRO FLOW AIR KIT

WAS RUNNING:
180 MAIN JET
45 PILOT JET
STOCK MUFFLER W/ BAFFLE REMOVED
AIRBOX LID OFF
CAM MOD
72 MPH 9.00 SECONDS @ 1000FT.

LOOKING FOR A WAY TO MAKE IT FASTER. ANY IDEAS?

datster · 01-11-2005, 03:30 PM

04 yfz
Glamis/ Gorman

exhust: trinity stage IV
intake: Ronwoods
needle: gytr #4
cammod

pilot:48
main:180
A/F:2 1/2

450z-71 · 01-30-2005, 07:54 PM

u can see my mods in my sig. what should i use, i am really needing help :dunno i have no idea what i am doing

craft_10 · 01-31-2005, 12:01 AM

hey, i'm new to this website, but was wondering if anyone could me out there!! I am going crazy trying to get my quad jetted right.
first here's what's happening, it revs slowly fine, but you when try to punch it falls on its face and cuts out. also on the deacceleration it pops and shoots a flame out sometimes. i've tried several different jetting combos with the jetkit i received with my sparks full pipe, which includes a 170,172, 175, 178 main jets; a 45 pilot, and the NCQV needle. curtis sparks reccomends a 175 main, the 45 pilot and the needle at the 4th clip, but that doesn't seem to work to well.
I have a curtis sparks header and slip-on, k&n with no airbox lid. those are only mods i have done. I live in kansas, so any help would be greatly appreciated. I have been working on this about 2 weeks now and can not get it to run smoothly. PLEASE HELP ME, I'M GOING CRAZY WITH THIS!

gotsand450 · 01-31-2005, 12:15 AM

Just get a LECTRON carb......... no jetting what so ever...... you find these at www.packardracing.com

:yfzcent

playa28 · 02-16-2005, 10:15 PM

Quote:

Originally posted by PhatFireMan@Sep 3 2004, 07:38 PM
Have you done a plug check with that jetting? If so...how did it look? I am very interested to know.
This is what I am running at 1500 to 3000 feet...
172
48
JD Blue #3
1 to 2 turns
Yoshi TRS complete, K&N, no lid, cam mod
I am wondering if I should bump the needle to #4 for Glamis/Pismo... :wtf

im wondering why you went with the blue needle instead of the red thanxs

drd slipon, lid off, k/n air filter, cam mod

170 mj
148pj
jd red #3

TroyKrum · 02-22-2005, 06:53 PM

Southern Cali... Desert and Glamis!

HMF Full System with Quiet Core
K&N Filter with Outerwears
Stock airbox - No lid

180 main jet - and still backfiring
48 pilot jet

Still backfiring and running hot. Think I am still lean... 180 is a big jet but the backfiring tells me it is lean. Also, runs fine with the choke out! Going bigger...

**Duane** · 02-22-2005, 07:08 PM

Finally got it dialed in......

CT Racing System
No lid
K&N with Outerwear wrap
Sea level

#168 main jet
#45 pilot jet
3rd clip on CT needle
1 1/2 turns out on fuel screw +/-

Chesapeake,VA

10-17-2004, 02:01 PM	#41 (permalink)
ketchupYFZ450 Senior Member Join Date: Aug 2004 Posts: 1,065	The pointy end. ;) __________________ Special thanks to www.twistedaxleracing.com and www.velocityracingatv.com for providing me with the means and support to supply others with embarrassment.

10-31-2004, 06:17 AM	#42 (permalink)
patboud Member Join Date: Aug 2003 Location: Sherbrooke,Québec,Canada Posts: 79	ESR pipe ESR intake cam mod NCVQ needle Vortex CDI main jet #188 pilot #48 clips #4 2 turns 700 ft That seem richer than most of here 8\| It was jetted on dyno __________________ '06 YFZ 450 '09 Renegade X 800R

11-15-2004, 06:43 PM	#44 (permalink)
Deimos Member Join Date: Sep 2004 Posts: 63	Elevation- 100 Temp- 55 White bros. E2 no lid K&N Pilot jet- 45 Main Jet- 168 NCVQ needle- 4th clip Fuel screw- 1.5 turns __________________ The key to immortality.....is living a life worth remembering.

11-19-2004, 11:09 AM	#45 (permalink)
ketchupYFZ450 Senior Member Join Date: Aug 2004 Posts: 1,065	My new jetting specs after latest mods... Hotcams ESR intake TC Exhuast SRP CDI 50p 190m 5th clip NCVQ 1.5 turns on the fuel screw but still fine tuning. I may even be able to go higher on the main but I don't have any higher main jets to test this theory. __________________ Special thanks to www.twistedaxleracing.com and www.velocityracingatv.com for providing me with the means and support to supply others with embarrassment.

12-03-2004, 11:22 AM	#48 (permalink)
400grl Senior Member Join Date: Oct 2003 Location: Chandler, AZ Posts: 1,031	STOCK SHORTY PIPE - no restrictions - stock header ESR Intake kit w/ airbox intact but no lid Cam Mod Chandler, AZ....... 175 main jet 45 pilot 4th clip with dirtbike needle This is jetted perfectly........ :rock __________________ Corry www.wellerracing.com 2004 YFZ A HUGE THANKS to my 2005 Sponsors!!! Rated X Motorsports www.fakeracing.com BRM Offroad

10-31-2004, 11:29 AM	#43 (permalink)
MTXracer36 Senior Member Join Date: Mar 2004 Location: Glendale, AZ Posts: 3,725	esr pipe esr filter 175 45 4th clip nvcq (yz) needle 200-800

11-22-2004, 12:39 PM	#46 (permalink)
540 Bogmonster Junior Member Join Date: Nov 2004 Posts: 24	I run-----GYTR end can, YZ450F exhaust cam, alloy airbox+trx 250 air filters, 168 main 45 pilot 5 clip (yz450f needle) 2 turns. I am from the UK. BUT SHE RUNS FINE SUMMER WINTER what ever.

11-23-2004, 01:20 PM	#47 (permalink)
ChadJ99 Junior Member Join Date: Oct 2004 Posts: 12	My '05 yellow/black YFZ is running with the GYT-R Titanium pipe and header (I know, the header is a waste, but I love the purple color it turns :) ). I also have the GYT-R intake/ filter. Mainly ride Glamis... Pilot #45 Main #168 GYT-R Needle 4th clip Air screw 2 turns

12-17-2004, 09:37 PM	#49 (permalink)
FAST1 Senior Member Join Date: Sep 2003 Location: Minneapolis, MN Posts: 2,632	Stock bore/piston cam mod Jardine RT4 full system (no sparky) GYT-R K&N with lid off Location: GLamis 175 main 4th clip NCVQ needle 48 pilot 2 1/2 turns fuel mix screw I have tried the 5th clip/175, 4th clip/178 and 4th clip/180 also. Planning on sticking in a 50 pilot as a test next. Never hurts to test even when you think your jetted perfect.

12-28-2004, 02:07 AM	#50 (permalink)
AKquadracer Senior Member Join Date: Dec 2004 Location: AK all da' way (alaska.. durr!) Posts: 229	diffrent octains changes engine and jetting settings too, i used 90 octain with my whitebrothers e2 slip on and ran fine, then i put in 100 octain and it started sputtering and acting wierd, then i put 90 back in and it was normal __________________ "if winnings not everything, why do they keep score?" '04 yfz450 Paul Pelkey #55 Nine07 Racing co-owner Ankh-Racing! Check it out!

12-29-2004, 06:30 AM	#51 (permalink)
PeteW Junior Member Join Date: Dec 2004 Posts: 6	Leo Vince X3 FIM Cam Mod no air box lid 45PJ JD Red #4 168 or 170 Main depending on the day FS 1.5 turns always run 98 octane fuel too __________________ 04 YFZ450 red/white and black SPP tapers, MSC steering damper, Leo Vince X3, JD Jetting. 01 WR 426 91 CBR400

01-03-2005, 03:57 PM	#52 (permalink)
jhead Junior Member Join Date: Dec 2004 Posts: 13	New 05 YFZ 450 special edition Yoshimura TRS full system No. 2375500-SA (tri oval pipe) NCVQ at clip postion 3 Main jet No.170 Pilot jet No.48 mixture screw at 2 3/4 turns pro flow foam filter with airbox mod removed airbox lid Fontana CA (runs great!) Yea Buddy! :rock

01-03-2005, 05:51 PM	#53 (permalink)
Fixxxer27 Junior Member Join Date: Jan 2005 Posts: 2	2004 YFZ450 . CURRENTLY RUNNING: STOCK HEAD PIPE FMF MID PIPE FMF TITANIUM 4 Muffler FMF JET KIT: 142 MAIN 42 STOCK PILOT FMF NEEDLE ON #5 CLIP CAM MOD AIRBOX LID OFF SOON TO BE ADDING A K&N PRO FLOW AIR KIT WAS RUNNING: 180 MAIN JET 45 PILOT JET STOCK MUFFLER W/ BAFFLE REMOVED AIRBOX LID OFF CAM MOD 72 MPH 9.00 SECONDS @ 1000FT. LOOKING FOR A WAY TO MAKE IT FASTER. ANY IDEAS?

01-11-2005, 03:30 PM	#54 (permalink)
datster Member Join Date: Dec 2004 Posts: 38	04 yfz Glamis/ Gorman exhust: trinity stage IV intake: Ronwoods needle: gytr #4 cammod pilot:48 main:180 A/F:2 1/2

01-30-2005, 07:54 PM	#55 (permalink)
450z-71 Junior Member Join Date: Apr 2004 Posts: 29	u can see my mods in my sig. what should i use, i am really needing help :dunno i have no idea what i am doing __________________ 2004 YFZ 450-blue ~full GYT-R skids ~GYT-R Nerf bars ~PRM rear grab bar ~HMF slip on ~Pro Design Intake ~K&N Air Filter ~Dyno Jet Kit ~Shock Pros 2001 Honda Rancher 4x4 S

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01-31-2005, 12:01 AM	#56 (permalink)
craft_10 Junior Member Join Date: Jan 2005 Posts: 2	hey, i'm new to this website, but was wondering if anyone could me out there!! I am going crazy trying to get my quad jetted right. first here's what's happening, it revs slowly fine, but you when try to punch it falls on its face and cuts out. also on the deacceleration it pops and shoots a flame out sometimes. i've tried several different jetting combos with the jetkit i received with my sparks full pipe, which includes a 170,172, 175, 178 main jets; a 45 pilot, and the NCQV needle. curtis sparks reccomends a 175 main, the 45 pilot and the needle at the 4th clip, but that doesn't seem to work to well. I have a curtis sparks header and slip-on, k&n with no airbox lid. those are only mods i have done. I live in kansas, so any help would be greatly appreciated. I have been working on this about 2 weeks now and can not get it to run smoothly. PLEASE HELP ME, I'M GOING CRAZY WITH THIS!

01-31-2005, 12:15 AM	#57 (permalink)
gotsand450 Senior Member Join Date: Jan 2005 Posts: 175	Just get a LECTRON carb......... no jetting what so ever...... you find these at www.packardracing.com :yfzcent

02-22-2005, 06:53 PM	#59 (permalink)
TroyKrum Senior Member Join Date: Dec 2004 Location: Yucaipa, California Posts: 136	Southern Cali... Desert and Glamis! HMF Full System with Quiet Core K&N Filter with Outerwears Stock airbox - No lid 180 main jet - and still backfiring 48 pilot jet Still backfiring and running hot. Think I am still lean... 180 is a big jet but the backfiring tells me it is lean. Also, runs fine with the choke out! Going bigger... __________________ Troy * My Webpage - Check it out! <span style="color:red">'05 YFZ450 - White & Red -Pro Taper Contour Bars with Clamp -Alba 'Pro Elite' Red Anodized Nerf Bars -Alba 'Pro Elite' Bumper - Red Anodized Insert -HMF Sport Series Full System in Candy Apple Red -HMF Jet Kit, 170 Main, 48 Pilot, Zip-Ty Fuel Mixture Screw -K&N Filter w/ Outerwears, No Airbox Lid

02-22-2005, 07:08 PM	#60 (permalink)
Duane Senior Member Join Date: Dec 2004 Posts: 13,943	Finally got it dialed in...... CT Racing System No lid K&N with Outerwear wrap Sea level #168 main jet #45 pilot jet 3rd clip on CT needle 1 1/2 turns out on fuel screw +/- Chesapeake,VA __________________ My photography website---->http://duanenoblick.zenfolio.com/ "Live as if you were to die tommorow. Learn as if you were to live forever." -Ghandi