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

ketchupYFZ450 · 08-30-2004, 10:20 PM

Maybe we should start a compilation of jetting specs according to exhaust type, mods. and location...might give other members a place to start when modifying their bikes. Just a thought...I'll list mine soon as I get home from work and figure out what they are, exactly.

04redyfz450 · 08-30-2004, 11:55 PM

Well I will go first.....Muzzy slip-on stock air box with uni filter elevation 3000 feet I am currently jetted at 168 main 45p stock clip at 5th clip, no cam mod yet. :red :sonic

Scandal · 08-31-2004, 02:36 AM

yoshimura TRS complete exhaust system, cam mod done, K&N air filter no air box lid, 48p, 172m, 5th clip on the gytr (NCVQ) needle, about 2 turns on the fuel screw.....
At sea level, Corona, Ca......

RoostItUp · 08-31-2004, 03:06 AM

Isn't the "Jetting FAQ" sticky for this kind of thing?

Full FMF Factory 4 system
Cam Mod
Pro-Flow K&N no lid
NCVQ on #4
175 main
45 pilot around 3 turns

sea level to 1000 ft.

Lokiyfz450 · 08-31-2004, 11:45 AM

pipe: LRD full system
cam: YZ
piston: LRD/JE 13:1 50/50 mix 114/92 octane
intake: 400ex K&N with mod air hose
main jet: 172
pilot jet: 50
needle: 4th from the top
fuel screw: one turn out
sea level

Mike Hunt · 08-31-2004, 09:59 PM

DMC Alien exhaust
cam mod
K&N proflow with lid on
3000 feet above sea level
168 main 45 pilot 3 clip on NCVQ needle

raygun · 08-31-2004, 10:41 PM

I'm running the Dr.D pipe with a GYT-R header
No lid
Noss Machine intake flange with a K&N filter and outerwear

170 main jet
45 pilot jet
JD blue needle on 4th clip

I just bought the jet4power a/f meter but I still need to install it.
I'll post results when I do.

As it is this thing pulls all the way to redline in each gear. My top speed was 78.51 mph using a Magellan GPS. That's without the GYT-R header.
I forgot to add I ride at about 3000ft. elevation.

JJONES660 · 09-01-2004, 01:13 PM

HOTcams
13:1 gytr piston
alba full exhaust
EsR intake no airbox
48 pilot at 1 3/4 turns
ncvq needle at clip 5

5000 feet 180 main
7300-7500 feet 178 main
8500 feet and above 175 main

these main jet figures are rich i believe but i like my motor to run cool and if it can burn it why not??
all these mains my bike still runs very fast on and im still kind of messing with things and experimenting...the biggest difference for me was running a 50/50 race mix and the ESR did a great job of feeding the gas to the cams...

yfzmxer · 09-01-2004, 02:17 PM

Curtis Sparks Exhaust
RonWoods Intake
Cam Mod
175 Main
48 Pilot
NCVQ Needle, 3rd Clip
3220 ft

**blaknblu** · 09-01-2004, 04:05 PM

Quote:

Originally posted by JJONES660@Sep 1 2004, 12:13 PM
HOTcams
13:1 gytr piston
alba full exhaust
EsR intake no airbox
48 pilot at 1 3/4 turns
ncvq needle at clip 5

5000 feet 180 main
7300-7500 feet 178 main
8500 feet and above 175 main

these main jet figures are rich i believe but i like my motor to run cool and if it can burn it why not??
all these mains my bike still runs very fast on and im still kind of messing with things and experimenting...the biggest difference for me was running a 50/50 race mix and the ESR did a great job of feeding the gas to the cams...

I was thinking the higher you go in elevation the richer the jetting should be due to less density in the air. Damn, am I having a brain fart or what?

yfzthumpa · 09-01-2004, 04:07 PM

full fmf titanium

168m
45p
1.5 turns
yz needle third clip
800 feet above sea level :rock :yfz

onebadyfz · 09-02-2004, 12:07 AM

sparks pipe
170 main jet 48 pilot 1.25 turns on fuel screw 4th clip on yz needle prodeisgns k&n not lid on the air box

980ft

Chapman · 09-02-2004, 12:32 AM

Sparks Full System
172 main
45 pilot
YZ needle on 4th clip
2 turns on screw
80ft. elevation
No lid with UNI filter

bordsmnj · 09-02-2004, 12:57 AM

yoshi slip on
k&N kit
no lid
screw@2.5 turns out
yz needle(ncvq)3rd or 4th clip
48 pilot 168 main
1000-3000 ft and never need the choke so far.still gotta do the cam mod

Pladeaux · 09-03-2004, 11:17 PM

Dr.D Slip-on, Ron Woods Intake w/Large Dualstage Uni-filter, Custom Airbox, no other engine mods. 1-1/2 turns on the fuel screw, 48 pilot, ncvq needle 4th clip, 172 main. 25 feet elevation, 85 degrees, near the ocean.
Idles well and runs strong!! Thanks YFZ Central members for all the helpful info.
Dang!!That is one nice lookin quad Chapman!

PhatFireMan · 09-03-2004, 11:38 PM

Quote:

yoshimura TRS complete exhaust system, cam mod done, K&N air filter no air box lid, 48p, 172m, 5th clip on the gytr needle, about 2 turns on the fuel screw.....
At sea level, Corona, Ca......

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

Kirklandrock · 09-05-2004, 03:06 PM

Pro-Circuit T-4 slip on, Uni-Filters, Ehs Racing lid.

168 main
45 pilot
NCVQ needle on 4th clip
2.5 turns out on screw

pretty much rips.............................. gonna try one of the Power Now inserts soon.............

DonoYFZ450 · 09-05-2004, 04:11 PM

Quote:

Originally posted by 3MTA3HONDAS@Sep 3 2004, 09:48 PM
Great idea but why don't you just put it in you signature?

lol but do we really need loooonger sigs??? some of these guys tell us Waaaaaaaaaaay too much info as it is!!

Scandal · 09-06-2004, 01:21 AM

[quote]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...

I change my plug after every glamis season and it is a light brown or coffee color... I might go up to 175m, when I ride wide open desert, feels like I'm hitting the rev limiter at wide open throttle....
How does your plug look at 1500 to 3000 feet??

YFZ_53 · 09-06-2004, 01:37 AM

TC Exhaust with CFM Airbox/K&N Filter-- No cammod or enginework
Sea Level
----------------------------
168 Main
45 pilot
3 1/4 turns out
5th Clip on NCVQ Needle
----------------------------

Please make this a Sticky Boss or Pahrump. This will be a very informative thread if everyones posts their jetting specs at what elevation, etc.

08-30-2004, 10:20 PM	#1 (permalink)
ketchupYFZ450 Senior Member Join Date: Aug 2004 Posts: 1,065	Maybe we should start a compilation of jetting specs according to exhaust type, mods. and location...might give other members a place to start when modifying their bikes. Just a thought...I'll list mine soon as I get home from work and figure out what they are, exactly. __________________ Special thanks to www.twistedaxleracing.com and www.velocityracingatv.com for providing me with the means and support to supply others with embarrassment.

08-31-2004, 03:06 AM	#4 (permalink)
RoostItUp Senior Member Join Date: Jun 2004 Location: Near Eugene, Oregon Posts: 395	Isn't the "Jetting FAQ" sticky for this kind of thing? Full FMF Factory 4 system Cam Mod Pro-Flow K&N no lid NCVQ on #4 175 main 45 pilot around 3 turns sea level to 1000 ft. __________________ To much to list! You can check out my Quad profile on Quad Hub!

08-31-2004, 11:45 AM	#5 (permalink)
Lokiyfz450 Senior Member Join Date: Oct 2003 Posts: 130	pipe: LRD full system cam: YZ piston: LRD/JE 13:1 50/50 mix 114/92 octane intake: 400ex K&N with mod air hose main jet: 172 pilot jet: 50 needle: 4th from the top fuel screw: one turn out sea level __________________ Sponsors: Tucker Pro Arm AXO America, Inc. ASV Inventions IMS Products TAG Metals RK Racing Chains Scott USA LA Sleeve Pro-X Works Connection LRD Performance Yamaha Sports Plaza M2R Helmets RB Components

08-31-2004, 09:59 PM	#6 (permalink)
Mike Hunt Member Join Date: Jul 2004 Posts: 79	DMC Alien exhaust cam mod K&N proflow with lid on 3000 feet above sea level 168 main 45 pilot 3 clip on NCVQ needle __________________ 2005 YFZ450 DMC Alien exhaust K&N proflow Cam mod

09-01-2004, 01:13 PM	#8 (permalink)
JJONES660 Senior Member Join Date: May 2004 Location: windsor, colorado, USA! Posts: 1,479	HOTcams 13:1 gytr piston alba full exhaust EsR intake no airbox 48 pilot at 1 3/4 turns ncvq needle at clip 5 5000 feet 180 main 7300-7500 feet 178 main 8500 feet and above 175 main these main jet figures are rich i believe but i like my motor to run cool and if it can burn it why not?? all these mains my bike still runs very fast on and im still kind of messing with things and experimenting...the biggest difference for me was running a 50/50 race mix and the ESR did a great job of feeding the gas to the cams... __________________ i dont login often so email me if ya need me jjones660@yahoo.com "Its the little things that separate the common from the best" Venom Performance & KBR for all your performance needs!

08-30-2004, 11:55 PM	#2 (permalink)
04redyfz450 Senior Member Join Date: Feb 2004 Posts: 121	Well I will go first.....Muzzy slip-on stock air box with uni filter elevation 3000 feet I am currently jetted at 168 main 45p stock clip at 5th clip, no cam mod yet. :red :sonic

08-31-2004, 02:36 AM	#3 (permalink)
Scandal Member Join Date: Nov 2003 Location: Corona, Ca Posts: 82	yoshimura TRS complete exhaust system, cam mod done, K&N air filter no air box lid, 48p, 172m, 5th clip on the gytr (NCVQ) needle, about 2 turns on the fuel screw..... At sea level, Corona, Ca......

08-31-2004, 10:41 PM	#7 (permalink)
raygun Senior Member Join Date: Jul 2003 Location: southern Kalifornia Posts: 126	I'm running the Dr.D pipe with a GYT-R header No lid Noss Machine intake flange with a K&N filter and outerwear 170 main jet 45 pilot jet JD blue needle on 4th clip I just bought the jet4power a/f meter but I still need to install it. I'll post results when I do. As it is this thing pulls all the way to redline in each gear. My top speed was 78.51 mph using a Magellan GPS. That's without the GYT-R header. I forgot to add I ride at about 3000ft. elevation.

09-01-2004, 02:17 PM	#9 (permalink)
yfzmxer Junior Member Join Date: Feb 2004 Posts: 20	Curtis Sparks Exhaust RonWoods Intake Cam Mod 175 Main 48 Pilot NCVQ Needle, 3rd Clip 3220 ft __________________ Curtis Sparks Exhaust Ron Woods Free Flow Race Intake Crower Gen 1 Cam Mod +4 TT Flywheel Dynatek FS Programmable Ignition AC Racing Nerf Bars +4 RPM Dominator Axle +2 wicked std travel a-arms Motion Pro Vortec Twist Throttle Hiper Beadlocks ITP Holeshot MX Fronts ITP Holeshot MXR4 Rears

09-01-2004, 04:07 PM	#11 (permalink)
yfzthumpa Senior Member Join Date: Sep 2003 Location: florida Posts: 921	full fmf titanium 168m 45p 1.5 turns yz needle third clip 800 feet above sea level :rock :yfz

09-02-2004, 12:07 AM	#12 (permalink)
onebadyfz Senior Member Join Date: Mar 2004 Posts: 326	sparks pipe 170 main jet 48 pilot 1.25 turns on fuel screw 4th clip on yz needle prodeisgns k&n not lid on the air box 980ft __________________ 2004 yfz 450 blue the faster one of the bunch jeting yz needle 4# 170 main and 1.25 turns on fuel screw 48 pilot jet AC pro nerfs,AC back skidd,AC front skidd,AC grab bar,Sparks pipe,Sparks jet kit,Pro designs K&N filter kit,trail tech bars with clamp,13t sprocket 15t sprocket,woodward master cilinder relocater,woodward fuel screw,yz needle for the arm ripping mid punch i may not be smart enuf to do everything but i am dum enuf to try anything

09-02-2004, 12:32 AM	#13 (permalink)
Chapman Senior Member Join Date: Jun 2004 Location: Southern Indiana Posts: 284	Sparks Full System 172 main 45 pilot YZ needle on 4th clip 2 turns on screw 80ft. elevation No lid with UNI filter __________________ 05 YFZ Stroker 03 CR 250

09-02-2004, 12:57 AM	#14 (permalink)
bordsmnj Senior Member Join Date: Mar 2004 Location: garden grove, ca Posts: 148	yoshi slip on k&N kit no lid screw@2.5 turns out yz needle(ncvq)3rd or 4th clip 48 pilot 168 main 1000-3000 ft and never need the choke so far.still gotta do the cam mod __________________ Blue is ALWAYS faster...

09-03-2004, 11:17 PM	#15 (permalink)
Pladeaux Senior Member Join Date: May 2004 Location: Santa Ana, Calif Posts: 383	Dr.D Slip-on, Ron Woods Intake w/Large Dualstage Uni-filter, Custom Airbox, no other engine mods. 1-1/2 turns on the fuel screw, 48 pilot, ncvq needle 4th clip, 172 main. 25 feet elevation, 85 degrees, near the ocean. Idles well and runs strong!! Thanks YFZ Central members for all the helpful info. Dang!!That is one nice lookin quad Chapman! __________________ Gorman-- Santa Ana, California

09-05-2004, 03:06 PM	#17 (permalink)
Kirklandrock Member Join Date: Aug 2003 Location: Wauchula, Florida Posts: 66	Pro-Circuit T-4 slip on, Uni-Filters, Ehs Racing lid. 168 main 45 pilot NCVQ needle on 4th clip 2.5 turns out on screw pretty much rips.............................. gonna try one of the Power Now inserts soon............. __________________ Wauchula,FLorida......(south central) Pro Circuit,Uni,Tag,Motion Pro,Maxxis,AC Racing,Updog Industries,EHS Racing,PEP,Pro Design,Magnum,Maxima, READY FOR THE WOODS.... OOOppppppss almost forgot 04 YFZ 450 (white/red) PAID FOR!!! It RIPPPPPSSSSSSSSS!!!!!!!!! SOLD SOLD SOLD 05 Honda TRX 450R Decked for the woods....DR.D, HRC, UNI, Maxxis, GT Thunder, Maxima, TAG, PRM, AC Racing, Hellbound Racing, Moose......Paid for and HAULS THE MAIL...

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09-06-2004, 01:21 AM	#19 (permalink)
Scandal Member Join Date: Nov 2003 Location: Corona, Ca Posts: 82	[quote]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... I change my plug after every glamis season and it is a light brown or coffee color... I might go up to 175m, when I ride wide open desert, feels like I'm hitting the rev limiter at wide open throttle.... How does your plug look at 1500 to 3000 feet??

09-06-2004, 01:37 AM	#20 (permalink)
YFZ_53 Senior Member Join Date: Jul 2003 Location: Baton Rouge, Louisiana Posts: 9,374	TC Exhaust with CFM Airbox/K&N Filter-- No cammod or enginework Sea Level ---------------------------- 168 Main 45 pilot 3 1/4 turns out 5th Clip on NCVQ Needle ---------------------------- Please make this a Sticky Boss or Pahrump. This will be a very informative thread if everyones posts their jetting specs at what elevation, etc. __________________ 3jrgnfvq3ingvh3qbnvhbnjicfbnwhfb3qwijfbvqbcuiwbvhV BUHDBqhwbqchnbef3bw hvubwefvhuwebvuhwebvuhwebvjibeuhvbweijhrgbyuebngvf jwnhvbwuefhu8weghfyubweuifbhqwuehf7823hf9823hfu2