Jetting Database

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Jetting Database

Post  AtomicXRer on Sat Dec 06, 2008 3:32 pm

For informational and sometimes useful purposes, a jetting database would be good.

2005 XR650R
Stock Carb
Elevation: 7000 - 11000 ft
165 Main, 68 pilot, clip at 3rd position from top
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Re: Jetting Database

Post  Focker on Sat Dec 06, 2008 5:38 pm

Here's what I run:

2002 XR650R...Uncorked
Stock Carb
Elevation: 400 ft
172 Main during summer months (70 - 95 avg temps)
175 Main during colder months (40 - 50 avg temps)
68s pilot
Clip at 3rd position from top


Last edited by Focker on Wed Dec 10, 2008 6:04 am; edited 1 time in total

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More jetting

Post  Guest on Tue Dec 09, 2008 6:31 pm

05 with PC headers and muffler,Hot Cam 2,mild porting and valve work,vented side panel,11.5 coated Wiseco piston,Precision Concepts airbox insert. For jetting I use 68s pilot,HRC kit needle in middle for Baja and second for Idaho,175 main for Baja,172 for 5-6 thousand feet elevation in Idaho. Mung

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Re: Jetting Database

Post  badcooky on Tue Jan 06, 2009 12:24 am

Mung your thing should go allright.
Tell us about the batwing dude.
In the review section maybe.
TM 40-very sensitive to height and humidity
actually the toughest carb to jet i've ever had
but well worth it once sorted.
PILOT 30,3 1/2 out mostly.
AIR JET,1.1
y-4,NEEDLE JET'
90JY-1 NOT SURE WHAT CLIP
MAIN JET,140
PUMPER NOZZLE #50 COMES ON EARLY
Totally uncorked plus
Twin Air powerfilter.
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Re: Jetting Database

Post  Thumpmeister on Tue Jan 06, 2009 5:20 am

The best jetting guide is Borynacks jetting guide on his site. It tells how go to jet for what mods you have done. I've jetted my pig accordingly, and it runs great. Over 2000' it runs a little rich, and over 5000' it runs really rich, and dies sometimes. I usually ride pretty low, and in the desert it pulls away from just about anything else out there.

The most trouble I've had is getting the air/fuel mixture screw right. Other than that, Borynacks guide has been great.
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Re: Jetting Database

Post  BACK40 on Thu Jan 22, 2009 6:34 am

2000 xr650R

elevation 150-1000ft.
stock carb
175 main
68s pilot
clip 3rd from top
cheers
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Useful Articles on Jetting and Reading Spark Plugs

Post  Bump on Wed Jul 29, 2009 5:55 am

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Re: Jetting Database

Post  carbonz4me on Sun Apr 18, 2010 1:35 pm

heres mine:
2003 xr650r
wiseco 11:1 high comp piston,
stage 1 hot cam,
k+n filter,
68s pilot,
175 main,
100ft-1500ft,
clip 3rd frm top,
fuel screw 2-2.5 turns out.
runs well maybe very slightly rich at low rpm's , a smaller pilot may sort that but its not enough to worry about.
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Re: Jetting Database

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