Dasa exhaust - need jetting tips - Yamaha YFZ450 Forum : YFZ450, YFZ450R, YFZ450X Forums
  Yamaha YFZ450

Suzuki Z400

Suzuki LT-R450

Kawasaki KFX450

ATV Videos

Can-Am DS450
LinkBack Thread Tools
Old 06-15-2011, 01:04 PM   #1 (permalink)
Junior Member
Join Date: Jun 2011
Posts: 2
Default Dasa exhaust - need jetting tips

I have the Dasa Racing exhaust on my 2006 YFZ 450 and canít seem to get the tuning right. Can anyone help suggest the proper jetting?

Originally it had a 155 Main Jet and a 42 Pilot Jet. When I got the pipe someone at Dasa recommended a 175 Main Jet and 45 Pilot Jet with 2.5 turns out on the air mixture screw. I did that but it still wonít idle, it just stalls out if youíre not giving it gas. Runs great when youíre on the gas, maybe a little popping on deceleration.

Appreciate any help.
RickF YFZ 450 is offline   Reply With Quote
Sponsored Links
Old 06-15-2011, 01:23 PM   #2 (permalink)
Senior Member
kb motorsports's Avatar
Join Date: Dec 2005
Location: Kentucky
Posts: 5,273
Send a message via AIM to kb motorsports

I think you should try a 48 pilot jet if you have a stock motor with the air box lid removed.

Store Hours
Monday - Friday
10:00am - 6:00pm Eastern Time

kb motorsports is offline   Reply With Quote
Old 06-15-2011, 03:55 PM   #3 (permalink)
Junior Member
Join Date: Jun 2011
Posts: 2

The motor is stock and I do have the airbox lid removed. Any thoughts on the air mixture screw? Should I just keep going up on the Pilot if the 48 doesn't work? How do I know when I've gone too big on the Pilot?
RickF YFZ 450 is offline   Reply With Quote
Old 06-15-2011, 04:05 PM   #4 (permalink)
Senior Member
Join Date: Dec 2010
Location: Irving, TX
Posts: 192

I've got an 08 with a Dasa and stock motor w/ airbox removed and mine runs strong with a 162 main, 45 pilot, needle on clip 3, 2.5 turns on air/fuel screw.
2008 YFZ450 - Dasa Full System, Pro Taper Handlebars, Houser +1.5 Anti-vibe Steering Stem, GT Thunder A-Arms, HLS Elite Shocks, CCP Stabilizer, Pro Armor Front Bumper, Pro Armor Rear Grab Bar, GYTR Nerf Bars, Powermadd Handguards, TAG Glider Skidplate, Teixeira Tech Swingarm Skidplate, UPP Case Saver.

BTwrestle04 is offline   Reply With Quote
Old 06-15-2011, 10:05 PM   #5 (permalink)
dust n' u's Avatar
Join Date: May 2006
Location: Portland, OR
Posts: 2,304

jetting will depend on your elevation also...
2006 SE-DASA Classic Full System,FCI, Cam mod, Houser +2 stem, Flexx Bars 12* ATV Bend, Fox Floats.

Jetting Specs: 42p- 170m-3rd clip NCVQ 2.0 out, 0-500'.

2006 SE yfz450 -Son's-He Thinks

2011 Raptor 250 - Wife's - She Thinks

"Sorry is for criminals and screw ups and I'm neither"
dust n' u is offline   Reply With Quote
Sponsored Links

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 08:44 PM.

Powered by vBulletin® Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.1
YFZCentral.com is an independent Yamaha enthusiast website. Content on YFZCentral.com is generated by its users and YFZCentral.com is not in any way affiliated with Yamaha Motor Corporation, U.S.A.