Jet thread

M

mnnthbx

Member

Apr 1, 2003

301

0

• May 2, 2003

• #1

Assuming there is no standard jetting accross the board, I thought it would be helpfull to many folks if we could list our location, state of mods, and jetting set ups as a "starting point" for others to guage there requirements. A thread of this nature could at least get other riders, contemplating this every popular topic some assurance they are in the ballpark.

03 200
Knoxville Tn
stock w/ drilled air box
45 pilot
155 main
A/S 1 turn out
clip in 3rd position

 

8

89kdx200rdr

~SPONSOR~

Apr 19, 2003

488

0

• May 3, 2003

• #2

89 kdx 200
fmf fatty pipe, fmf turbine core silencer, old boyesen reeds, possibly leaking carb holder, no airbox lid, new uni filter, 48 pilot,158 main,1172 needle clip in second from top pos., on 93 exxon pump with kawa oil. b9es plug. airscrew 11/4. rich across the whole rpm range. have new reeds, new carb holder, 45 pilot, 1173 needle, 155 main. when i get it all in and recheck it i'll repost.

 

B

Bricks88

Sponsoring Member

Mar 14, 2002

70

0

• May 3, 2003

• #3

mnnthbx I think its a great idea :thumb: I have a 01 KDX220 stock pipe and silencer no airbox lid.148 main and 48 pilot I know its too rich and Id like to buy a few sets of jets too try, but if I had examples of what other people are having success with at similar elevations and temps I would have a good starting point.

 

S

skipro3

Mod Ban

Dec 14, 2002

902

0

• May 3, 2003

• #4

1999 KDX220R Normally ridden at 4-6K' elev. Boyesen reeds, Wiseco Piston, FMF K-35 Pipe, TurbocoreII silencer, airbox lid removed, UNI airfilter
Carb set at: 140-main, 35-pilot, AS-1.5 turns out, stock needle at the top/leanest clip.
BR8ES plug
Running on Race Gas VP C-12 and Maxima Super M oil at 40:1
NOTE: If you try going this lean, use a fuel that you are sure is consistant from tank to tank, know it's cooling capacity, and it's vaporization range. I would not run this lean with pump gas. Too much variation from one fillup to the next.

 

F

Fuzzy Dice

Trial Subscriber

~SPONSOR~

Jul 8, 2002

96

0

• May 3, 2003

• #5

2000 KDX 220,Memphis,TN, 200 FT Above Sea Level,FMF G30 Rev/Desert pipe,FMF Turbine Core II spark arrestor,lid off Airbox,13/50 gearing,bought it slightly used and I know it has stock jetting.FMF recommends 50/48 Pilot and 155 Main Jets but they don't list the elevation for their recommendations.I would also appreciate suggestions for my elevation. Anybody,thanks in advance.This is a great topic.I think a Jetting Database is wanted by more than a few members here.

 

T

twocycle

Member

Feb 21, 2002

78

0

• May 5, 2003

• #6

I have a 1989 KDX 200. Everything is stock except for airbox lid is removed.

152 main, 1172n in 3rd position, 48 pilot 2 turns out.

Elevation is 0 -750 ft., temp. 50 - 65

Oil MX2T
Hi test

I am still jetting. It is still rich in places.

 

K

KAY DEE EXER

~SPONSOR~

Mar 3, 2003

629

0

• May 11, 2003

• #7

98 200
fmf pipe + silencer
airbox cut out w/pantyhose cover
155 main
45 pilot
r1173k needle 3rd clip
a/s 1 3/4 out
pulls the front up first 4 gears no clutch no probs

 

P

Porter

Member

Jan 2, 2001

72

0

• May 11, 2003

• #8

01 200 FMF gnarley w/ tc2 Vforce reeds 35p 152m cel4 38:1 GP7

 

R

r.2 stroke

~SPONSOR~

Dec 29, 2001

73

0

• May 12, 2003

• #9

Great thread,..mine is a 2000 220r,airbox lid with holes drilled,fmf gnarly k-35(like to try the k-30)fmf silencer,145 main,40 pilot,air screw 2 turns out,needle on 2nd from top,motul 800 @40:1,most of my riding at around sea level,ngk br8es sparkplug.Need to grab a box of jets and fiddle around for a day and get it set up properly,still a bit to much spooge....maybe a little rich on one of the circuits.

 

T

twocycle

Member

Feb 21, 2002

78

0

• May 12, 2003

• #10

I just changed my pilot to a 45 1.5 turns out. This made a huge
difference. It now runs crisp to about 3/4 throttle. I am going to lower
my main jet to 148 and see what happens. It still seems to run very rich
on top.



My new settings are 152 main, 1172n 3rd clip, 45 pilot 1.5 turns out.

 

B

beefking

~SPONSOR~

Nov 12, 2002

150

0

• May 12, 2003

• #11

89 KDX200 @ seal level-500ft MAX
Wiseco +2mm piston
PC Pipe
no lid
reverse-flow section cut out from stock silencer (much shorter)
ports polished, stock head

Currently: 155mj, 48pj, 2.5 turns out PAJ, stock needle at 2nd clip.

Runs awesome on top, a hair rich. Pilot circuit is rich for sure, I'll try a 42 sometime this week. Other than the pj being rich, throttle response and general power is excellent. :thumb:

 

T

twocycle

Member

Feb 21, 2002

78

0

• May 16, 2003

• #12

Final jetting for my stock, except for air lid removal, 89 KDX

45 pilot 1.5 turns out, 1172N in 3rd postion, 148 main

Runs clean from top to bottom, no spooge, very little smoke

 

ZKDX

~SPONSOR~

Aug 23, 2002

309

0

• May 16, 2003

• #13

87 kdx 200 air box mod, power reeds, top needle position on stock needle, 330 main (going to test a 310 or 320 soon, will post) 30 pilot, no air screw on this carb, running basically at sea level. BR9ES.

Runs good except on bottom end, if putting around, will foul, working on problem--switching to hotter plug, then trying new needle...

btw---excellent idea on the database!

 

M

mcoker

Member

Mar 18, 2003

123

0

• May 16, 2003

• #14

Where's a good place to get jets? I'd like to buy a few sets to test out on my bike, but I can't find a place that sells 'em.

 

T

twocycle

Member

Feb 21, 2002

78

0

• May 16, 2003

• #15

You can't get them locally at your bike shop, but they can be expensive. Or at
www.sudco.com, www.carbparts.com, www.denniskirk.com to name a few.

 

N

NX650

Member

Dec 9, 2002

15

0

• May 16, 2003

• #16

Twocycle,

I have an 89 KDX with only the airbox removed (looks like an identical configuration) I too am running the Mobile MXT oil and I'm curious about your mixture ratio? (I've been running 32:1).

 

T

twocycle

Member

Feb 21, 2002

78

0

• May 16, 2003

• #17

NX650,

I am running Mobil MX2T at 40 to 1 with hitest gas.

 

8

89kdx200rdr

~SPONSOR~

Apr 19, 2003

488

0

• May 16, 2003

• #18

heres a good place to get jets.

http://www.frpoffroad.com/Merchant2/merchant.mv?Screen=CTGY&Store_Code=FRP&Category_Code=Keihin

 

G

GREENHORNET

~SPONSOR~

Jan 20, 2003

119

0

• May 16, 2003

• #19

I've got a 2001 220 Right now i am running 38/155 needle in 2nd from top- I've got BOYSEN RAD Valve RB designs carb no air box lid i run either GNARLY REV or GRUNT pipe and i have a TC2 S/A. I live in iowa 500 ft above sea level, as it gets warmer here i'll drop the main down and adjust the needle, Ron sent me 2 needles when i got my carb bored. Is it true there are no smaller pilot jets than a 38?

 

M

mcoker

Member

Mar 18, 2003

123

0

• May 20, 2003

• #20

Originally posted by GREENHORNET
snip... Is it true there are no smaller pilot jets than a 38?

Click to expand...

Skipro has a 35 pilot jet