Jetting that works, collecting info - Yamaha Raptor Forum
 4Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 300 (permalink) Old 11-12-2006, 03:35 PM Thread Starter
 
Join Date: Oct 2005
Posts: 1,726
Jetting that works, collecting info

Would like to collect the jetting that people are using and know to work well.
With any luck others will be able to find a simillar setup and have a starting point for thier carbs.
A standard format would be easiest to follow.


Elevation and region of the country or world. Including this since humidity levels affect jetting to some degree.

Jet manufacturer,
Dynojet, Mikuni, GYTR, others.

Pipe maunfacturer

Motor mods

Air box mods

Porting........ this is tough since it's hard to compare who has what.

Compresion ratio?


I know I'm missing something in this and assume some editing or starting over may be necessary.

Any thought's on the format or other ideas would be great.
firstraptor is offline  
Sponsored Links
Advertisement
 
post #2 of 300 (permalink) Old 11-12-2006, 04:40 PM
Moderator
 
Mad Dog's Avatar
 
Join Date: May 2005
Posts: 17,054
Re: Jetting that works, collecting info

Location: Central Michigan
Elevation: 600' above sea level
Jet Type: Mikuni, CT needles
Intake Mods: K&N Pro-flow kit w/o airbox lid
Exhaust Mods: CT w/ 16 discs
Porting/Motor Mods:
Other:

Jetting:
Pilots: 22.5
Fuel Screws: 2.5/3.0 L/R
Needles: 3rd (middle) clip
Mains: 165/170 L/R

--------------------------------------------------------------------------------------------------------------------
Location: Central Michigan
Elevation: 600' above sea level
Jet Type: Mikuni, CT needles
Intake Mods: K&N Pro-flow kit w/o airbox lid
Exhaust Mods: CT w/ 16 discs
Porting/Motor Mods: Stage 1 Hotcam
Other:


Jetting:
Pilots: 30
Fuel Screws: 1.5 L/R
Needles: 3rd (middle) clip
Mains: 175/180 L/R

Comments: Ice racing conditions necessitated increased idle fuel flow, hence 30 pilots.

--------------------------------------------------------------------------------------------------------------------

Location: Central Michigan
Elevation: 600' above sea level
Jet Type: Mikuni, CT needles
Intake Mods: K&N Pro-flow kit, no airbox
Exhaust Mods: CT w/ 16 discs
Porting/Motor Mods: Wiseco 11:1 100mm, Stage 2 Hotcam
Other:

Jetting:
Pilots: 30
Fuel Screws: 1.5 L/R
Needles: 4th clip (richer side)
Mains: 185/190 L/R

Mike

Photobucket is trash now, use something else.
Mad Dog is offline  
post #3 of 300 (permalink) Old 11-12-2006, 04:58 PM
 
Join Date: Nov 2006
Posts: 4
Re: Jetting that works, collecting info

Location: New York ,bronx
Elevation:100 ft above sea level
Jet Type: Mikuni
Intake Mods: K&N Powerlid, uni prodesign
Exhaust Mods: lrd full exhaust
Porting/Motor Mods:stock
Other: biggun cdi

Jetting:
Pilots: 27.5
Fuel Screws: 2 r,l
Needles: 3rd clip
Mains: 160/165

added stage 1 hot cam increased mains to 170L175R
Quote:
location new york mods K&N powerlid,lrd full exhaust,biggun cdi,uni prodesign,27.5 piolot 160165 needle 3rd clip
hugozoon is offline  
 
post #4 of 300 (permalink) Old 11-14-2006, 08:18 PM Thread Starter
 
Join Date: Oct 2005
Posts: 1,726
Re: Jetting that works, collecting info

Location: Wisconsin
Elevation:600 ft above sea level
Jet Type: Mikuni
Intake Mods: K&N drop in, lid had minimal material left to hold filter in pplace
Exhaust Mods: Rossier full exhaust
Porting/Motor Mods:stock bore and piston, minimal porting
Other:

Jetting:
Pilots: 25
Fuel Screws: 2 1/2 r,l
Needles: 3rd clip
Mains: 160/165
firstraptor is offline  
post #5 of 300 (permalink) Old 11-14-2006, 09:35 PM
 
Join Date: Dec 2005
Posts: 80
Re: Jetting that works, collecting info

I just let the fuel injectors take care of things
rosko_racing is offline  
post #6 of 300 (permalink) Old 11-14-2006, 10:10 PM
Senior Member
 
mikes#04's Avatar
 
Join Date: Nov 2005
Posts: 211
Re: Jetting that works, collecting info

location:wisconsin
elevation:600ft above sea level
jet type k&ns

intake mods/k&n with outwears open lid
exaust mods/yoshimara comp complete with header
porting/motor mods:102mm 11to1 wiseco piston
porting and polished carbs and head ,valve grind by janssens kibblewhite spring kit and kibblewhite black diamond valves
stage 2 web cams
other: janssen cdi (1000more rr's)

jetting

pilots22.5
fuel screw 3.5 to 4 l/r
needles :k&n replacements 5thclip l/4th clip r
mains 150l/155r
fuel/ vp c-12
this is what i remember

old enough to know better<br />2006 2nd senoirs 35+ great lakes quad series<br />2006 2nd VET A&nbsp; 25+ great lakes qaud series
mikes#04 is offline  
post #7 of 300 (permalink) Old 11-15-2006, 02:08 AM
 
Join Date: Feb 2006
Posts: 364
Re: Jetting that works, collecting info

location: Oregon
elevation:sea level
jet type mikuni

intake mods/k&n with outwears open lid
exaust mods/Alba complete with header and race endcap...megaphone style
porting/motor mods:none



jetting

pilots 27.5
fuel screw 1.5 / 2
needles dynojet middle clip
mains 150l/155r

I do run a bit lean at 200 degrees but thats where the power is
maxb750 is offline  
post #8 of 300 (permalink) Old 11-15-2006, 12:18 PM
 
Join Date: Nov 2005
Posts: 22,016
Re: Jetting that works, collecting info

Location: Fort Smith, AR
Elevation: 469 feet ASL
Jet Type: Mikuni
Exhaust: Yoshimura RS3 Full system, no spark arrestor.


Intake: Modified factory snorkel with K&N filter, airbox lid in place, K&N Crank case filter
Jets: Mikuni 155 left main, Mikuni 160 right main, Mikuni 22.5 pilot jets
Mixture screw: 2.5 turns left carb, 2.75-3 turns right carb
Needle settings: Factory needle settings

With airbox lid removed/modified with EHS Racing lid

Jets: Mikuni 160 left main, Mikuni 165 right main, Mikuni 22.5 Pilot jets.
Mixture screw 2.5 turns left carb, 2.75-3 right carb
Needle settings: Factory needle settings


~Brian




Flynbyu is offline  
post #9 of 300 (permalink) Old 11-15-2006, 08:53 PM
rt
Senior Member
 
rt's Avatar
 
Join Date: Sep 2006
Posts: 1,568
Re: Jetting that works, collecting info

Location: 40 miles S.W. of Cleveland, Ohio
Elevation: 750'-800'
Fuel\air: Stock carbs-(Mikuni')
Average Relative Humidity (%) 65-70

Intake Mods-No lid, no box, custom airfilter shroud (Equivilent of the back half of airbox gone) Twin k&n's, Custom runners (filter to carb), crankcase breather filter.

Exhaust Mods-CT Sonic Full system-16 disks

Motor Mods- none on this one..no porting

Jet kit-stock a/f screws--stock pilots--ct needles--Mikuni mains

Settings A/F screw......Pilots........Needles.......Mains
Summer 2.5-2.75 22.5 3rd 165-170
spring/fall 2.5-2.75 22.5 3rd 170-175
Winter 2.5-3 22.5 3rd-4th 170-175

Thats assuming all temps, pressures, humidities are not unseasonable.
I also run a little richer Air/Fuel mix...around 12.5:1 to 13:1 on full throttle. (My personal preference)
The Spark plug is also one step cooler in summer, and normal in winter..fall..spring

If your looking at me from behind, that means I&#039;m ready to lap ya!
rt is offline  
post #10 of 300 (permalink) Old 11-20-2006, 08:03 AM
Senior Member
 
warwgn's Avatar
 
Join Date: Sep 2006
Posts: 240
Re: Jetting that works, collecting info

Location: Paguate, New Mexico
Elevation: 6000' above sea level
Jet Type: Dyno Jet, DJ needles
Intake Mods: K&N w/outerwear/no airbox
Exhaust Mods: DMC Afterburner Comp
Porting/Motor Mods:102mm w/12:1 and stage 1 cam
Other:

Jetting:
Pilots: 25
Fuel Screws: 2.5/2.5
Needles: 3rd (middle) clip
Mains: 148/150
us7race likes this.
warwgn is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Yamaha Raptor Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Jetting that works for my setup that works help! existanzrx7 Raptor 660 Modifications 6 05-18-2010 05:04 PM

Posting Rules  
You may post new threads
You may 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

 
For the best viewing experience please update your browser to Google Chrome