How is my jetting?
- Gotanubike
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How is my jetting?
Can you tell by looking at the plug after a ride??
I try to run my bike mostly in the medium to high rev range to avoid fouling plugs. I just took these pictures after a half hour ride.
I heard they should be tan but looks more chocolate..?? I am running 40:1 with an FMF gold pipe and silencer. Brand new top end plating and piston with stock jetting I believe.
I try to run my bike mostly in the medium to high rev range to avoid fouling plugs. I just took these pictures after a half hour ride.
I heard they should be tan but looks more chocolate..?? I am running 40:1 with an FMF gold pipe and silencer. Brand new top end plating and piston with stock jetting I believe.
1990 KDX200
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Re: How is my jetting?
A kdx fouling plugs? Never fouled a plug on mine.
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04 Kdx200 w/ PC Platinum 2
- Gotanubike
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How is my jetting?
I fouled one last summer. Well not me, but a friend who was riding it and not using the powerband properly maybe? I might have been running 32:1 then
1990 KDX200
Bike Profile -> http://www.kdxrider.net/forums/viewtopi ... 61#p136315
Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
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Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
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Re: How is my jetting?
looks pretty good, but if you're running stock jetting then chances are you're a tad rich on the pilot and main circuits. whats your elevation level?
- Gotanubike
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How is my jetting?
Elevation is 70–110 m (230–360 ft) in Kingston, Ont. The bike has some symptoms of rich jetting such as slightly slow response in the low rpm(as in from a near stand still) and some slight hesitation and crackling. I also have my air screw a 1/4 turn rich which I forgot to adjust today.
Turning out the screw is just a bandaid fix though. My bike needs new clean jets anyways, mine are dulled out and probably a little corroded. What size main and pilot would you recommend for my current set up with the FMF pipe? I don't even remember the stock sizes
http://www.jetsrus.com/a_jet_kit_dirt/k ... 8_2006.htm
Also, are there any differences between genuine keihin and OEM equivalent? Best to go with genuine?
Edit: I did a bit of research and found the stock sizes 48 and 158. Should I drop the pilot to 45 or 42, and just leave the main or buy a new one equivalent size? If I go up one or two sizes on the main jet will I gain any top end power?
Turning out the screw is just a bandaid fix though. My bike needs new clean jets anyways, mine are dulled out and probably a little corroded. What size main and pilot would you recommend for my current set up with the FMF pipe? I don't even remember the stock sizes
http://www.jetsrus.com/a_jet_kit_dirt/k ... 8_2006.htm
Also, are there any differences between genuine keihin and OEM equivalent? Best to go with genuine?
Edit: I did a bit of research and found the stock sizes 48 and 158. Should I drop the pilot to 45 or 42, and just leave the main or buy a new one equivalent size? If I go up one or two sizes on the main jet will I gain any top end power?
1990 KDX200
Bike Profile -> http://www.kdxrider.net/forums/viewtopi ... 61#p136315
Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
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Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
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Re: How is my jetting?
oh my. your plug looks way better than mine did at stock jetting. whatever was in my kdx when I got it, pretty much unmolested, was PIG F'n rich, totally rubbish. Now I have on my 93 kdx, FMF pipe and sparky, RAD valve, no-toil filter, hacked air box and 40:1 honda hp2. My plug will last roughly 30 hours with 150/42 jets. 1 1/4 out on the air screw. stock needle, 2 clicks up. Hope that helps a bit. I went with keihin parts, because they are cheap and available, and I'm tired of dicking with crappy off brand parts.
Parameters
I ride from 0ft elevation to ~4k tops
I hate cold (anything under 40F) and I hate hot (85F and up) mainly because I have to pull the carb apart to change jets :)
Parameters
I ride from 0ft elevation to ~4k tops
I hate cold (anything under 40F) and I hate hot (85F and up) mainly because I have to pull the carb apart to change jets :)
- Gotanubike
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How is my jetting?
FMF actually has a model specific recommendation for jetting with their pipes
http://www.fmfracing.com/RiderSupport/JettingCenter
Looks like 45-48 on the pilot and 152-158 on the main.
I'm going to try a 45/155
http://www.fmfracing.com/RiderSupport/JettingCenter
Looks like 45-48 on the pilot and 152-158 on the main.
I'm going to try a 45/155
1990 KDX200
Bike Profile -> http://www.kdxrider.net/forums/viewtopi ... 61#p136315
Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
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Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
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Re: How is my jetting?
looks grey to me what plug are you using?it looks too hot! jetting is lean or timing is too advanced.Hard to tell from the pictures but it looks like small aluminium globs on the porceline and the ground strap is grey all the way to the shell.
- Gotanubike
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How is my jetting?
Too hot? Pretty sure if it was too hot the plug would be white...
Alminum globs? Whatcha talkin bout Willis
Plug is champion, they didn't have the NGK at the store
Alminum globs? Whatcha talkin bout Willis
Plug is champion, they didn't have the NGK at the store
1990 KDX200
Bike Profile -> http://www.kdxrider.net/forums/viewtopi ... 61#p136315
Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
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96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
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- Jaguar
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Re: How is my jetting?
it looks grey to me also. But unless a plug is way too light colored or way too dark colored I pay no attention to it at all. Not because I'm some KDX riding hillbilly but because I have lots of experience at jetting and I just go by how it runs throughout the RPM range, which is what the experts do. They don't go by plug color. Color has more to do with gas additives and oil used.
rich- sounds "congested", can sputter, runs better uphill and worse downhill
lean- sounds hollow, runs weaker, runs better downhill and worse uphill
Test at all three throttle ranges- 0- 1/3, 1/3-2/3, 2/3 to wide open
Note also how it accelerates when you open the throttle.
rich- sounds "congested", can sputter, runs better uphill and worse downhill
lean- sounds hollow, runs weaker, runs better downhill and worse uphill
Test at all three throttle ranges- 0- 1/3, 1/3-2/3, 2/3 to wide open
Note also how it accelerates when you open the throttle.
Performance CDI -- KDX motocross mods -- the SR KDX -- expansion chamber analysis---> http://www.dragonfly75.com/moto/
- Gotanubike
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How is my jetting?
There is quite a bit of hesitation and crackling through the low to middle of the power band when giving it throttle. Once kips kicks in, it's pretty smooth sailing. Does that sound like rich pilot, or both? Should have gone smaller than a 45?
1990 KDX200
Bike Profile -> http://www.kdxrider.net/forums/viewtopi ... 61#p136315
Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
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Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
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Re: How is my jetting?
Am I missing something here? Why don't you just spend an hour or three and jet your bike properly? The following link from this site is an excellent resource:
http://www.kdxrider.net/forums/viewtopi ... 105&t=1156
Good luck!
http://www.kdxrider.net/forums/viewtopi ... 105&t=1156
Good luck!
2003 KDX200: Bone stock
2003 KDX 220:
Boyesen reeds
Gnarly Gold Series pipe
Turbine Core 2 silencer
Fat Bars
Super Sport IMS pegs
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Tusk dualsport light kit
LED headlamp
Boyesen Factory Racing mag cover
Airbox snorkel removed
Wiesco piston and rings
2003 KDX 220:
Boyesen reeds
Gnarly Gold Series pipe
Turbine Core 2 silencer
Fat Bars
Super Sport IMS pegs
Cycra Probend hand guards
Tusk dualsport light kit
LED headlamp
Boyesen Factory Racing mag cover
Airbox snorkel removed
Wiesco piston and rings
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Re: How is my jetting?
get the thicker OEM needle, already
go down one on pilot and 2 on main
Get an NGK plug if you want anyone else on the planet to guess at temp range.
go down one on pilot and 2 on main
Get an NGK plug if you want anyone else on the planet to guess at temp range.
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- Gotanubike
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How is my jetting?
I went down 1 on each for a 45/155
What size needle are you talking about? There is about 100 listed on jetsrus
http://www.jetsrus.com/a_jets_by_carbur ... 27-48.html
What size needle are you talking about? There is about 100 listed on jetsrus
http://www.jetsrus.com/a_jets_by_carbur ... 27-48.html
1990 KDX200
Bike Profile -> http://www.kdxrider.net/forums/viewtopi ... 61#p136315
Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
KDXrider world map! -> https://www.zeemaps.com/map?group=186158
Bike Profile -> http://www.kdxrider.net/forums/viewtopi ... 61#p136315
Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
KDXrider world map! -> https://www.zeemaps.com/map?group=186158
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Re: How is my jetting?
kawasaki.com, OWNER INFO, PARTS DIAGRAMS... it is one step thicker,,, the one Jeff Fredette recommends.
Which pipe do you have??
I was at 45/150
Be aware that 1990 - 1994 is 150 main, not 158 as 1989
Which pipe do you have??
I was at 45/150
Be aware that 1990 - 1994 is 150 main, not 158 as 1989
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- Gotanubike
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How is my jetting?
Thanks, I stated earlier that it has an FMF gold pipe
There is a 158 in there now. In fact it has all stock jetting 158/48. It is a 1990 model after checking the 10th digit of the VIN ...it left the factory or imported 09/89 so at first I did think it was E1.
Jeff recommends the same as the FMF website. A 152-158 and 45-48 and 1173 needle. So I will be right in the middle with the 155/45.
150 main seems like a big step down but I see they did make that change in 1990+ diagrams. Would rather be too rich than too lean
Looks like R1170N on the needle, with 5 other options(A~D) going up in number size. I assume 1172 is standard and Fredette recommends the 1173?
There is a 158 in there now. In fact it has all stock jetting 158/48. It is a 1990 model after checking the 10th digit of the VIN ...it left the factory or imported 09/89 so at first I did think it was E1.
Jeff recommends the same as the FMF website. A 152-158 and 45-48 and 1173 needle. So I will be right in the middle with the 155/45.
150 main seems like a big step down but I see they did make that change in 1990+ diagrams. Would rather be too rich than too lean
Looks like R1170N on the needle, with 5 other options(A~D) going up in number size. I assume 1172 is standard and Fredette recommends the 1173?
1990 KDX200
Bike Profile -> http://www.kdxrider.net/forums/viewtopi ... 61#p136315
Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
KDXrider world map! -> https://www.zeemaps.com/map?group=186158
Bike Profile -> http://www.kdxrider.net/forums/viewtopi ... 61#p136315
Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
KDXrider world map! -> https://www.zeemaps.com/map?group=186158
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Re: How is my jetting?
R1173N is one step leaner by way of being thicker.
When I jetted mine, it ran great at:
45 pilot
stock slide
R1173N needle
150 main
73 degrees, 1000 ft elevation
FMF pipe, FMF spark arrestor, Twin Air filter, airbox lid cut halfway
The thicker needle helped in the 1/8 - 1/4 throttle range.
When I jetted mine, it ran great at:
45 pilot
stock slide
R1173N needle
150 main
73 degrees, 1000 ft elevation
FMF pipe, FMF spark arrestor, Twin Air filter, airbox lid cut halfway
The thicker needle helped in the 1/8 - 1/4 throttle range.
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- Gotanubike
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How is my jetting?
So the stock needle is not Keihin, but made by Kawasaki? Kaw r1173n needle translates to Keihin N427-48 BGP/017-426 in the conversion table and I get this:
http://www.jetsrus.com/individual_parts/017_426_su.html
$20 to ship a $6 needle to Ontario. Any other place I can check prices? I got the Keihin jets on ebay together for the price it would cost just to ship them with jetrus
http://www.jetsrus.com/individual_parts/017_426_su.html
$20 to ship a $6 needle to Ontario. Any other place I can check prices? I got the Keihin jets on ebay together for the price it would cost just to ship them with jetrus
1990 KDX200
Bike Profile -> http://www.kdxrider.net/forums/viewtopi ... 61#p136315
Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
KDXrider world map! -> https://www.zeemaps.com/map?group=186158
Bike Profile -> http://www.kdxrider.net/forums/viewtopi ... 61#p136315
Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
KDXrider world map! -> https://www.zeemaps.com/map?group=186158
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Re: How is my jetting?
Keihin makes them for Kawasaki. You can buy the comparable one.
You guys get screwed on shipping.
I bought mine from Jeff Fredette years ago.
I have recently bought jets from Rocky Mountain. Maybe they ship to Canada.
You guys get screwed on shipping.
I bought mine from Jeff Fredette years ago.
I have recently bought jets from Rocky Mountain. Maybe they ship to Canada.
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- Gotanubike
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How is my jetting?
Hmm not seeing anything in the way of needles on RM. Although they do have good prices on jets
1990 KDX200
Bike Profile -> http://www.kdxrider.net/forums/viewtopi ... 61#p136315
Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
KDXrider world map! -> https://www.zeemaps.com/map?group=186158
Bike Profile -> http://www.kdxrider.net/forums/viewtopi ... 61#p136315
Suspension Overhaul(Shock+89-92 conventional forks) -> http://www.kdxrider.net/forums/viewtopi ... 15&t=15255
96'-98' RM125 Showa 49mm fork swap -> http://www.kdxrider.net/forums/viewtopi ... 04&t=16994
KDXrider world map! -> https://www.zeemaps.com/map?group=186158