• 2 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     WR = 2st Enduro & CR = 2st Cross

  • Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

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125-200cc 125 / 150 Jetting Database

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MattR

MattR

2T Forum Clerk
Staff member
This database is for jetting setups on the CR,WR 125 / 144 / 150 bikes.
The goal is to list your carburetor settings and provide a brief conclusion of the results.

Please do not post jetting questions in this thread.
These questions should be posted in Jetting Chat.


You should copy and paste this list below into your reply. This will help keep a common format.

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

Year & Bike Model =
Carb =
Pipe & Silencer =
Other engine mods =
Gearing =
Premix ratio & fuel type =
Temperature range (deg F) =
Elevation (feet) =
Main jet =
Pilot jet =
Needle =
Clip position =
Air screw setting =
Slide =
Conclusions/Results =

-----------------------------------------------------------------------
 
Year & Bike Model = 2006 WR125
Pipe & Silencer = stock with TCII
Other Mods = 36mm PWK, RB cut head, 50% Avgas
Temperature range (deg F) = 60
Elevation (feet) = 1500
Main jet = 162
Pilot jet = 42
Needle = JD Blue (from old 250sx JD kit)
Clip position = 3
Air screw setting = 1.5 (doesn't really matter much though)
Slide = 6.5
Conclusions/Results = Runs clean. Will chug and pull on the pipe with ease. Very little spooge. Go one step richer across range if using pure pump fuel.
 
Note: Swapped carb from stock Mikuni 38 to a PWK 38

Year & Bike Model = 2009 WR125
Carb = Keihin PWK 38
Pipe & Silencer = 04 Doma pipe and PC SA
40:1 Amsoil
Temperature range (deg F) = 55-65f
Elevation (feet) = 50-2500
Main jet = 178
Pilot jet = 45
Needle = JD blue in the middle
Clip position = #3
Air screw setting = 1.5 - 2
Slide = 7

Runs hard bottom to top, no bog. VERY happy with performance since the PWK swap.

Note: i have the powervalve actuating arm with the adjustment near the top.
 
John,

The race gas helps as well as the cr ignitions in the 125's. That said I can't imagine you can get the WR 250 to run well on the bottom or idle above 8000' with whatever jetting you want to put in the stock TMX. ;)

Walt

My 144 with the PWK airstriker from Kelly:
Pump 92 octane
Elevation-4500'-10000'
175 main
45 pilot
Blue JD needle in the 4th slot
1.5 turns on the airspeed
#7 slide
Amsoil Dominator mixed at 45:1
Yellow spring with the green inner spring
Linkage adjusted 3/4 of the way to the top

Runs great top to bottom, pulls hard everywhere, no bog with a nice semi-progressive hit. PWK airstriker made a huge difference.

PS, MY WR 360 jetting-39mm PWK
165 main
42 pilot
CEL Keihin needle in 3rd slot
#7 slide
1.75 turns out on the airspeed
40:1 Amsoil Interceptor
Runs clean and strong everywhere a 360 should.
 
For your list be sure to add fuel/oil mix ratio as lots of folks have different trains of thought here, 32:1, 40:1, 50:1 etc.
factory calls for 33:1 for the 125 (close enough to use the easy mix ratio 32:1)
the 250 and 300 call for 50:1 by the OEM spec

(less oil more rich fuel mix, more oil more lean fuel mix)

effect on jetting is an issue with vaious mix ratios as well as with all the other parameters (temp/alt etc).
 
Year & Bike Model = '09 WR125
Carb = PWK38AS (Motosportz Husky 125 kit)
Pipe & Silencer = Stock pipe, OEM Euro3 Enduro no SA
Other engine mods = Stock
Premix ratio & fuel type = 40:1 Spectro Synthetic
Temperature range (deg F) = 35-65F
Elevation (feet) = 1000-2000
Main jet = 178
Pilot jet = 45
Needle = JD Blue
Clip position = 3rd (middle)
Air screw setting = 1.5-2
Slide = 7
Conclusions/Results = I'm going to start out at Kelly's settings and go from there. Carb was delivered with 185 main jet installed, 45 pilot, JD Blue needle in 4th position from top, air screw 2 turns out. 175 and 180 main jets and JD Red needle were also provided in the kit.
 
Year & Bike Model = '09 WR125
Carb = Mik (stock)
Pipe & Silencer = Stock/ FMF turbine core
Other engine mods = 0...rock stock inlc. air filter.
Premix ratio & fuel type = 50:1 Motul 710 2T, pump gas (Ca)
Temperature range (deg F) = 32 - 75
Elevation (feet) = 3000-6000
Main jet = 480
Pilot jet = 32.5
Needle = thinner (richer) of two factory needles. i measure mine instead of reading #'s
Clip position = #4
Air screw setting = 1.5 - 1.75 out
Slide = 4.0
Conclusions/Results = snappy, luggable, no bog, top end rips like godzilla going through tokyo- nothing can stop it!
very little/almost no smoke and no spooge to speak of. no coke on piston or in head pipe.
cleanest two-stroke oil ever, ever do you hear?!?!?! :busted:
 
wr144 jetting

bike - 2009 wr 125 with the EG 144 kit.
Walt spring kit - only the yellow spring installed
carb - keihin pwk 38 air striker
main jet - 178
pilot - 45
needle - NOZH 2 slot from top
slide - 65 or 6.5
i used the ktm cable it is exactly what this carb needs since it came from a ktm and i did not remove the curved pipe from the mikuni carb.
i ride from sea level to 500 fit.
i ordered the JD jet kit but the bike now thanks to Walt advice is working perfect with the keihin needle.
i will replace it with the JD blue one as i get it.
 
Year & Bike Model = 2008 CR125
Carb = Keihin PWK 38mm Air Striker with JD Jetting Kit
Pipe & Silencer = Stock pipe with FMF turbine core 2 spark arrestor
Other Engine Mods = PV Spring Kit (Walt's) or OEM Spring
Gearing = 13/52
Premix & Fuel = 40:1 with 93 octane

First Setup (4/3/2010):
Temperature range (deg F) = 55 - 80 degF (Spring Setting)
Elevation (feet) = 500 - 1000 feet
Main jet = 185
Pilot jet = 45
Needle = JD Blue needle
Clip position = #4
Air screw setting = 2.25 turns out
Slide = 7.0
PV Spring Combination = Yellow + Silver
Conclusions/Results = This was the baseline jetting that came with the PWK from Motosportz. I thought it may be rich, but better rich than too lean. Overall, it worked pretty good. Clip #3 was better for the warmer 80 degF weather. Note: I felt a lack of low end response and want to try a softer PV spring combination next time (Orange + Green).

UPDATE (4/13/2010):
The Orange + Green PV spring combination was a step in the wrong direction. The bike had no bottom end and was difficult to lift the front wheel over logs. I'm going to put the OE spring back in to establish a baseline with the PWK carb. My belief is the OE spring may work good with the PWK, whereas, the TMX likes the softer spring combinations.

UPDATE (4/15/2010):
I rode my bike again with the OEM power valve spring and the temperature was 85 degF. I learned a couple of things from my ride. First, the OEM spring worked excellent with the PWK. There was no bog sensation that was present with the softer spring combination. The bike had a strong low end and I could lug down in 2nd gear and power out of corners with minimal clutch work. I could not do this previously. I was very happy!

Second observation was that I could keep the jetting slightly richer than before. The air screw was turned out to 1.5 turns, same jets as above, and same clip setting (#4). Even though the temperature was hot at 85 degF, the bike pulled cleanly from low to mid throttle. I rode tight woods so I couldn't verify the WFO throttle today.

Another observation upon disassembly of the softer spring combination (orange + green) was that the upper link arm that's preloaded with the torsion spring was sloppy. You could see the link arm wobble from freeplay side-to-side before actuating the power valve. When I replaced the power valve spring with the OEM version (stiffer), the slop in the upper link arm went away. This is just something to consider when you are swapping out the springs. Be careful not to induce "extra slop" in the linkage system. For my bike, it made the power valve open too early or not stay closed properly (causing poor low end response). In any case, the OEM spring is working very good. I may try the "white + silver" spring combination, but anything softer would be bad on my bike.
 
huskyguss

hope get some usefull replies. husky wr125 2007. sea level. used for enduro riding competitively. weight of our riders 59kg and 63kg 15 and 16 year olds .
we need more bottom end power as you pull away and as you approach a rocky or sandy hill , you have to slip the clutch to keep it going in the power . simply opening the throttle does nothing and it takes time to sort of build up then hit powerband.
main jet 390 running sweet on top end plus on colour of plug .
60 needle middle clip ie 2 down from top.
35 pilot jet .
2-3 turns out on air screw .
std pipe but with all emissions removed .
std air filter etc etc
some say 30 pilot ??? plse advise it did work on a wr250 i sold last week
but will this work on the 125

i look forward to replies
ross
 
Update for 144 kit...

Note: Swapped carb from stock Mikuni 38 to a PWK 38 and installed a OEM 144 kit. Stock PV springs.

Year & Bike Model = 2009 WR125
Carb = Keihin PWK 38
Pipe & Silencer = 04 Doma pipe and PC SA
40:1 Amsoil
Temperature range (deg F) = 55-75f
Elevation (feet) = 50-3500
Main jet = 172
Pilot jet = 45
Needle = JD red
Clip position = #4 (one richer than middle)
Air screw setting = 1.5 - 2
Slide = 7

Runs hard bottom to top, no bog. VERY happy with performance since the PWK swap. Super happy since 144 install

Note: I have the powervalve actuating arm with the adjustment near the top.
 
Year & Bike Model = 1995 WR125
Carb = KEIHIN PWK 38MM AS
Pipe & Silencer = 1995 Stock pipe & 2006 250 silencer
Other engine mods = 2000 head, 56.45 MM WOSSNER PISTON, 0.9 MM Squish height
Premix ratio & fuel type = 40:1
Temperature range (deg F) = 26-34'C
Elevation (feet) = 0-1000 ft
Main jet =165
Pilot jet =48
Needle = xxF (unsure)
Clip position = 2nd
Air screw setting = 1.75
Slide = #7
Conclusions/Results =
Clean from bottom a little hesitation at about 1/3 rd throttle, pulls well from mid to right thru to top. Little spooge & nice tone. needle change to do.

update - 20/11
Year & Bike Model = 1995 WR125
Carb = KEIHIN PWK 38MM AS
Pipe & Silencer = 1995 Stock pipe & 2006 250 silencer
Other engine mods = 2000 head, 56.45 MM WOSSNER PISTON, 0.9 MM Squish height
Premix ratio & fuel type = 40:1
Temperature range (deg F) = 26-34'C
Elevation (feet) = 0-1000 ft
Main jet =175
Pilot jet =45
Needle = CEL
Clip position = 2nd
Air screw setting = 2
Slide = #7
Conclusions/Results =
Still a little bit of a hole at 1/4 throttle, but pulls hard right through to top, I think it could go a little more with a larger main.
 
I didnt have as good of luck with the Keihin as some of you guys...it had an iffy response at light load/ high speed over whoops..or jump landings Its didnt matter what I did to it...it bugged me and I put my mikuni back on

However as the warmer weather stabilized....I put the keihin back on and I am very impressed with how it runs..the trick was the air screw at 1.5 turns was the problem....its perfect at 3/4 turn(pilot is a bit small)

I will do the 144 kit at about 1500kms (1200kms now)



Year & Bike Model =09WR125
Carb =38 PWK
Pipe & Silencer =2nd design pipe W/TC2
Other engine mods =Ran PV near top/I like it better at the middle ???
Premix ratio & fuel type =Maxima K2 32:1 dry at tip no spooge
Temperature range (deg F) =70-80F
Elevation (feet) =5800FT and up
Main jet =175
Pilot jet =42
Needle =red
Clip position =middle
Air screw setting =3/4 turn out
Slide =std
Conclusions/Results =nice pull everywhere...tractor like off bottom
 
:canada::cripple:
2010 WR125
All stock
Mikuni TMX38
20-30 degrees C
91Oct pump gas
40:1 Motul 510T
4.0 slide
80 slow jet; finally drilled the 50 out! seized from factory!
32.5 pilot
450 main
Power up needle 3rd
11/2 air screw

Elevation- 1000-6000ft

I have to put my bike to bed now! Surgery. I am so certain my bike is on to something. When I put the 80 slow jet in place of the 50, my bike starts first kick with no issue. I'm hoping the ride will be awesome in 2011.
 
Year & Bike Model = 2008 CR125
Carb = Keihin PWK 38mm Air Striker with JD Jetting Kit
Spark Plug = BR8EG
Pipe & Silencer = Stock pipe with FMF turbine core 2 spark arrestor
Other Engine Mods = OEM Spring or PV Spring Kit (Walt's)
Gearing = 13/52
Premix & Fuel = 40:1 with 93 octane

Spring/Summer/Fall Setting:
Temperature range (deg F) = 50 to 95 degF
Elevation (feet) = 500 - 1000 feet
Main jet = 180
Pilot jet = 45
Needle = JD Blue needle
Clip position = #4
Air screw setting = 1.5 to 2 turns out
Slide = 7.0
PV Spring Combination = OEM Spring
Conclusions/Results = This is the jetting that I ran most of the year. It has been very good. I have only needed minor air screw adjustments.

Winter Setting:
Temperature range (deg F) = 20 to 50 degF
Elevation (feet) = 500 - 1000 feet
Main jet = 185
Pilot jet = 48
Needle = JD Blue needle
Clip position = #4
Air screw setting = 1.5 to 2 turns out
Slide = 7.0
PV Spring Combination = OEM Spring
Conclusions/Results = This will be the first winter to try out the PWK. I'm going up 1 step on the pilot and 2 steps on the main. No needle or clip changes. Time to mount up my studded tires and have some fun.
 
Year & Bike Model = 2011 WR150
Carb = 38mm Keihin PWK AS
Pipe & Silencer = Stock pipe / FMF S/A silencer
Other engine mods = Exhaust spirngs Stock / silver.
Premix ratio & fuel type = Maxima Super M 40:1 , 100LL AvGas / 93oct non Ethanol pump gas mixed 50/50.
Temperature range (deg F) = 25 - 60
Elevation (feet) = 0 -1,500ft. ASL
Main jet = 178
Pilot jet = 40
Needle = JD Blue
Clip position = #5
Air screw setting = 2
Slide = 7.0
Conclusions/Results = Works well. Got most of the mid range bog / hesitation out. Less spooge at exhaust junction. Going to try NOZF needle next.
 

UPDATE: More Testing with 38mm.

Year & Bike Model = 2011 WR150
Carb = 38mm Keihin PWK AS
Pipe & Silencer = Stock pipe / FMF S/A silencer
Other engine mods = Exhaust spirngs Stock / silver.
Premix ratio & fuel type = Maxima Super M 40:1 , 100LL AvGas / 93oct non Ethanol pump gas mixed 50/50.
Temperature range (deg F) = 55
Elevation (feet) = 300ft. ASL
Main jet = 175
Pilot jet = 40
Needle = NOZF
Clip position = #2
Air screw setting = 1.5
Slide = 7.0
Conclusions/Results = Works very well. Got the mid range bog out. Just a tad of over carburated feeling if you open throttle too fast at lower RPM. Less spooge at exhaust junction. Plug color good.​
 
Year & Bike Model = 2011 WR150​
Carb = 36mm Keihin PWK A/S from 2011 KTM 150XC​
Pipe & Silencer = Stock pipe / FMF S/A silencer​
Other engine mods = Exhaust spirngs Stock / silver.​
Premix ratio & fuel type = Maxima Super M 40:1 , 100LL AvGas / 93oct non Ethanol pump gas mixed 50/50.​
Temperature range (deg F) = 55​
Elevation (feet) = 300ft. ASL​
Main jet = 170 (stock)​
Pilot jet = 38 (stock #42)​
Needle = NOZI (stock)​
Clip position = #4 (stock #3)​
Air screw setting = 2 (stock 1 3/4)​
Slide = 7.0 (stock)​
Conclusions/Results = Works VERY well. Got rid of the mid range bog / hesitation. Less of an over Carburated feeling. NO NOTICEABLE LOSS IN TOP END POWER. A slight improvement over the 38mm with the NOZF needle. Both setups working very good, with the nod going to the 36mm. So in conclusion, if you have a 38mm then get the NOZF needle and the jetting from the previous post and enjoy. If you are just now buying a Carb then go with the 36mm PWK and the above jetting. Contact (PM) me and I can direct you to a shop that will sell you a new 36mm PWK at a greatly reduced price. You will have to talk to the Parts Manager directly and mention my name and Cafe Husky to get that price. Over $100 cheaper than retail.​
Dwight Rudder​
 
Year & Bike Model = 2011 WR150​
Carb = 36mm Keihin PWK A/S from 2011 KTM 150XC​
Pipe & Silencer = Stock pipe / FMF S/A silencer​
Other engine mods = Exhaust spirngs Stock / silver.​
Premix ratio & fuel type = Maxima Super M 40:1 or K2 , 100LL AvGas / 110 Sunoco race gas mixed 4 gal AvGas to1 gal Race Gas. Non Ethanol Gas is no longer available in Mississippi and may not be anywhere according to the Gas Distributor.​
Temperature range (deg F) = 65​
Elevation (feet) = 300ft. ASL​
Main jet = 170 (stock) (tried a 172 and got a bit of a slight blubber at 3/4+ throttle till at RPM)​
Pilot jet = 38 (stock #42) (May try 35 with Air Screw set at 1 1/2)​
Needle = NOZI (stock)​
Clip position = #4 (stock #3)​
Air screw setting = 2 1/2 (stock 1 3/4) (May try 35 with Air Screw set at 1 1/2)​
Slide = 6.0 (stock 7.0) Reason for changes is that there is now a flat spot at the 1/4 throttle position. I am extremely close. Testing the next weekend.​
 
Year & Bike Model = 2006 WR125
Carb = TMX
Pipe & Silencer = Stock Pipe with CR silencer
Other engine mods = none
Premix ratio & fuel type = 32:1 with pump gas
Temperature range (deg F) = 40-90
Elevation (feet) = Sea level - 2000ft
Main jet = 380
Pilot jet = 35
Needle = 6jd8-58
Clip position = 3
Air screw setting =
Slide = #3
Conclusions/Results = This setup works better when it is cool out. This year I am going to try a carb divider plate and try to understand jetting better.
 
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