Jetting 101. - Page 7 - Yamaha YFZ450 Forum : YFZ450, YFZ450R, YFZ450X Forums

Brokennarsil · 08-07-2010, 10:33 AM

my hat in the ring for pics as well. Thanks!

brokennarsil16@yahoo.com

xSebast · 09-22-2010, 02:27 PM

Wow nice post sort of long tho, hahahaha im new here and practically new to my YFZ too, i started with the famous Blaster :D.... well getting back, great post... im having a few backfires after releasing my throttle so ill try to buy a differente needle cuz the one i have only has 1 position or well buy a different Pilot jet

rea_ction01 · 10-20-2010, 04:25 PM

Can you send me the picture to reactionjr@gmail.com I would greatly appeciate it thanks.

$Tmoney$ · 10-20-2010, 06:29 PM

hey guys i live at about 2500 ft and im jetting my 04 yfz for glamis i have read that people use a 175 main and a 45-48 pilot i have a 45 in mine with the a/f turned out 2. im am getting alot of popping after i let off the gas is this normal? what is the saying like elevation wise lean at higher elevation and richer at low? any advice would be appreciated and my mods are in my sig

attackk10 · 11-29-2010, 04:55 PM

can someone email me those pictures as well?
attackk10@aim.com

jrsmith_80 · 12-05-2010, 07:17 PM

Could I get you to end me the pics and info to jr_smith_80@yahoo.com
Thanks

fre043 · 01-05-2011, 07:22 PM

pics to xgenjammer1@yahoo.com PLEASE

quadyfz · 01-06-2011, 05:19 PM

Can i have those pics also? thanks
aribetancourt@hotmail.com

Tech5 · 01-11-2011, 09:03 PM

me to please

tech5ase@gmail.com

thank you!

jr4racing56 · 01-24-2011, 04:33 PM

nice writeup

boycea2005 · 02-10-2011, 05:30 AM

the easiest way i have found to get needle out was use a pair of tweezers they help amazing especially if you have big fingers!!!!!!!

Cyrus2327 · 02-14-2011, 06:39 PM

Do u have to jet it when u get a new exausted and do u do this with fuel injection?

r-rcain · 02-23-2011, 04:27 PM

Just dropped in a +3 crank (471 cc ) a pair of stage 3 hot cams and 12 to 1 Wisco piston.
Have a Trinity stage 4 exhaust and head is port and polished.
Any advice on jetting for 5000 ft elevation??

sonic loran · 02-23-2011, 06:06 PM

Hi Guys
sorry to do this but can anyone out there please help.i fitted a scorpion full system on my '07 yfz which had an esr system onnit and running perfect,the scorpion recommended a 200 main as i have an open top with a k&n onnit when i did all this THE BLOODY THING WONT START,if you tow it it will only start if you pin the throttle wide open but as soon as you let go it stops again.will not spark or wet plug under normal cranking.is there a safety fuel/spark cut off onnit or what is going on pleaseeee help someone

Joester · 02-23-2011, 06:11 PM

200 main is waaaaay too big if everything else is stock. if your only mod is the "scorpion" exhaust then you should probably have about a 165 main and a 45 pilot. a good place to start on the fuel screw is about 2.5 turns out. whats your elevation?

NHunter450 · 02-26-2011, 02:45 PM

'08 yfz 450 (non-fuel injected) Just put my DASA full exhaust on and FCI intake. DASA recommends 185 main and 45 pilot but they are out of Riverside / LA area. Well im up here in Reno NV (around 4500 ft) and not sure where to start jetting. Could use any advice you guys have thanx!

Nick

hankdoulen · 03-07-2011, 10:25 AM

can some please send me the pics to the write up?
send to brandonhaun@gmail.com

DJARZY · 03-08-2011, 03:50 PM

Hi guys Imo totally new over here , a couple months ago i bough a 05 yfz bone stock ...and know i just install a hmf slip on .... ok i know i need to rejet but i want to it right
my elevation its about 750 above sea level ( im in the east cost ) can be lower than that ..with the lip off and the hmf slip on will be 168m 45p clip #5 ?
and whit the lip on same but whit clip on #4 ?
im right ????

one more question right nw i have the clip on #3 position (stock ) do i relly need change the position of the clip to #4 OR #5 or i can keep it in the #3 position

thanks guys

DJARZY · 03-09-2011, 08:49 PM

Any help ????

boycea2005 · 03-10-2011, 01:56 AM

like

10-20-2010, 06:29 PM	#124 (permalink)
$Tmoney$ Member Join Date: Oct 2010 Location: Alta Loma, CA Posts: 65	elevation question hey guys i live at about 2500 ft and im jetting my 04 yfz for glamis i have read that people use a 175 main and a 45-48 pilot i have a 45 in mine with the a/f turned out 2. im am getting alot of popping after i let off the gas is this normal? what is the saying like elevation wise lean at higher elevation and richer at low? any advice would be appreciated and my mods are in my sig __________________ 04 YFZ 450 +2 fireball arms PEP shocks Steel braded brake lines cam mod big gun full race exhaust ESR intake zip tie mod 2" wheel spacers on the rear

12-05-2010, 07:17 PM	#126 (permalink)
jrsmith_80 Member Join Date: Dec 2010 Location: Newton, KS Posts: 46	Could I get you to end me the pics and info to jr_smith_80@yahoo.com Thanks __________________ 2006 YFZ 450 50th Anniversary Yellow Curtis Sparks Full Exhaust Ron Woods INtake K&N Houser Steering Renthal Bars

01-06-2011, 05:19 PM	#128 (permalink)
quadyfz Member Join Date: Nov 2010 Posts: 51	pica Can i have those pics also? thanks aribetancourt@hotmail.com

02-23-2011, 04:27 PM	#133 (permalink)
r-rcain Junior Member Join Date: Feb 2011 Location: Roy, Utah Posts: 1	Jetting a High Mod 06 Just dropped in a +3 crank (471 cc ) a pair of stage 3 hot cams and 12 to 1 Wisco piston. Have a Trinity stage 4 exhaust and head is port and polished. Any advice on jetting for 5000 ft elevation??

02-23-2011, 06:11 PM	#135 (permalink)
Joester Senior Member Join Date: Feb 2009 Location: High Ridge, outside St. Louis, MO Posts: 2,354	200 main is waaaaay too big if everything else is stock. if your only mod is the "scorpion" exhaust then you should probably have about a 165 main and a 45 pilot. a good place to start on the fuel screw is about 2.5 turns out. whats your elevation? __________________ 2007 YFZ450 Red/Gray - DMC Afterburner Comp full system - Pro Design Pro Flow intake and air filter - CP 12.75:1 piston - port work by Outlaw Innovations - Stage 2 HotCams - EHS Racing airbox lid - AC racing blackline nerfs - TAG metals black bumper - bent accelerator pump spring - Adjustable Fuel screw - Maxxis RAZRs all around - 15/38 gears

08-07-2010, 10:33 AM	#121 (permalink)
Brokennarsil Member Join Date: May 2010 Location: NE Florida Posts: 34	my hat in the ring for pics as well. Thanks! brokennarsil16@yahoo.com

09-22-2010, 02:27 PM	#122 (permalink)
xSebast Junior Member Join Date: Sep 2010 Location: San Jose, Costa Rica Posts: 5	Wow nice post sort of long tho, hahahaha im new here and practically new to my YFZ too, i started with the famous Blaster :D.... well getting back, great post... im having a few backfires after releasing my throttle so ill try to buy a differente needle cuz the one i have only has 1 position or well buy a different Pilot jet

10-20-2010, 04:25 PM	#123 (permalink)
rea_ction01 Junior Member Join Date: Sep 2010 Posts: 2	Can you send me the picture to reactionjr@gmail.com I would greatly appeciate it thanks.

11-29-2010, 04:55 PM	#125 (permalink)
attackk10 Junior Member Join Date: Apr 2010 Posts: 6	can someone email me those pictures as well? attackk10@aim.com

01-05-2011, 07:22 PM	#127 (permalink)
fre043 Junior Member Join Date: Aug 2009 Posts: 10	pics to xgenjammer1@yahoo.com PLEASE

01-11-2011, 09:03 PM	#129 (permalink)
Tech5 Member Join Date: Jan 2011 Location: Atlanta,GA Posts: 51	me to please tech5ase@gmail.com thank you!

01-24-2011, 04:33 PM	#130 (permalink)
jr4racing56 Junior Member Join Date: Jan 2011 Posts: 26	nice writeup

02-10-2011, 05:30 AM	#131 (permalink)
boycea2005 Member Join Date: Feb 2011 Location: Kansas Posts: 43	the easiest way i have found to get needle out was use a pair of tweezers they help amazing especially if you have big fingers!!!!!!!

02-14-2011, 06:39 PM	#132 (permalink)
Cyrus2327 Junior Member Join Date: Feb 2011 Posts: 17	Do u have to jet it when u get a new exausted and do u do this with fuel injection?

02-23-2011, 06:06 PM	#134 (permalink)
sonic loran Junior Member Join Date: Feb 2011 Posts: 3	Hi Guys sorry to do this but can anyone out there please help.i fitted a scorpion full system on my '07 yfz which had an esr system onnit and running perfect,the scorpion recommended a 200 main as i have an open top with a k&n onnit when i did all this THE BLOODY THING WONT START,if you tow it it will only start if you pin the throttle wide open but as soon as you let go it stops again.will not spark or wet plug under normal cranking.is there a safety fuel/spark cut off onnit or what is going on pleaseeee help someone

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02-26-2011, 02:45 PM	#136 (permalink)
NHunter450 Junior Member Join Date: Apr 2010 Location: Reno, NV Posts: 3	'08 yfz 450 (non-fuel injected) Just put my DASA full exhaust on and FCI intake. DASA recommends 185 main and 45 pilot but they are out of Riverside / LA area. Well im up here in Reno NV (around 4500 ft) and not sure where to start jetting. Could use any advice you guys have thanx! Nick

03-07-2011, 10:25 AM	#137 (permalink)
hankdoulen Member Join Date: Mar 2011 Posts: 46	can some please send me the pics to the write up? send to brandonhaun@gmail.com

03-08-2011, 03:50 PM	#138 (permalink)
DJARZY Junior Member Join Date: Feb 2011 Posts: 4	Hi guys Imo totally new over here , a couple months ago i bough a 05 yfz bone stock ...and know i just install a hmf slip on .... ok i know i need to rejet but i want to it right my elevation its about 750 above sea level ( im in the east cost ) can be lower than that ..with the lip off and the hmf slip on will be 168m 45p clip #5 ? and whit the lip on same but whit clip on #4 ? im right ???? one more question right nw i have the clip on #3 position (stock ) do i relly need change the position of the clip to #4 OR #5 or i can keep it in the #3 position thanks guys

03-09-2011, 08:49 PM	#139 (permalink)
DJARZY Junior Member Join Date: Feb 2011 Posts: 4	Any help ????

03-10-2011, 01:56 AM	#140 (permalink)
boycea2005 Member Join Date: Feb 2011 Location: Kansas Posts: 43	like