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Pro X N424-21 Series Keihin Pilot Jet

Fits Your MachineDisplaying parts for your 1990 KAWASAKI KX250
Pro X N424-21 Series Keihin Pilot Jet
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Pro X N424-21 Series Keihin Pilot Jet

Fits: 1990 KAWASAKI KX250

125999

Our Price: $3.21

MSRP: $3.76 - You save $0.55 (15% off)

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Details

  • N424-21 Series.
  • High quality aftermarket jets for Keihin carburetors.
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Pro X N424-21 Series Keihin Pilot Jet Reviews

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4.9 / 5.0
169 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
152
15
1
0
1
Value
4.9 / 5
Performance
4.9 / 5
Recommend it?
Yes (78)
No (1)
Value
5 / 5
Performance
5 / 5
Recommend it?
Yes
Dialed in
kid bike was starting to run rough, this did the trick. Purrs like a kitten now.
April 21, 2020
Battle Ground, WA, US
Purchased
2 months ago
Value
5 / 5
Performance
5 / 5
Recommend it?
Yes
Crisp and clean for the YZ250F
Crisp and clean! Exactly what my bike needed was a fresh unit. Got the YZ barking again, great product!

-m-1995 HONDA CR250R--
March 26, 2020
Mount vernon , KY, US
Age: 25-44
Purchased
2 months ago
Gender:
Male
Weight:
>281 lbs.
Height:
6'1 - 6'3
Value
5 / 5
Performance
5 / 5
Recommend it?
Yes
Oem jet
Worked great easy install

-m-2005 YAMAHA YZ250F--
March 18, 2020
Mocksville , NC, US
Age: 15-24
Purchased
2 months ago
Gender:
Male
Weight:
221 - 250 lbs.
Height:
6'1 - 6'3
Value
5 / 5
Performance
5 / 5
Recommend it?
Yes
FCR carb jetting
Used to successfully tune the bog out of a 2005 CRF250X.
March 9, 2020
Campbell River , BC, CA
Purchased
2 months ago
Value
4 / 5
Performance
4 / 5
Recommend it?
Yes
Nice product.
When I purchased my bike last year it did not run well at my altitude. I did lot of chasing around trying to get a good combination of jetting to get the bike running well. I got a variety of jets and these work great, just don't overtighten them as they are soft brass.

-m-2012 HONDA CRF450X--
March 6, 2020
PRESCOTT, AZ, US
Age: 45-64
Purchased
1 year ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Performance
5 / 5
Recommend it?
Yes
ProX jet
outstanding quality with an affordable price.

-m-1993 SUZUKI RM250--
March 2, 2020
claremont, NC, US
Age: 45-64
Purchased
3 months ago
Gender:
Male
Weight:
221 - 250 lbs.
Height:
6'1 - 6'3
Value
5 / 5
Performance
5 / 5
Recommend it?
Yes
Quality
Just like oem, fits right with a good price.

-m-2008 KAWASAKI KLX450R--
February 25, 2020
Dayton , NV, US
Age: 45-64
Purchased
3 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Performance
5 / 5
Recommend it?
Yes
Finally got my bike jetted right
They worked great. Finally got my bike jetted right. No complaints

-m-1998 HONDA XR250R--
February 25, 2020
Shelley, ID, US
Age: 25-44
Purchased
9 months ago
Gender:
Male
Value
5 / 5
Performance
5 / 5
Recommend it?
Yes
good quality
I installed this pilot jet to correct a KX250f that was running to lean. Perfect fit and fixed the decel popping. Great product.
February 13, 2020
Kailua, HI, US
Purchased
4 months ago
Value
5 / 5
Performance
5 / 5
Recommend it?
Yes
Satisfied
Good jet, works like it should. I would buy more like it.
February 10, 2020
Burleson , TX, US
Age: 25-44
Purchased
over 5 years ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
6'1 - 6'3
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Rocky Mountain ATV/MC gift card Each question or answer submitted enters you into a:
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 3 questions Browse 3 questions and 2 answers
I don't know what size lower jet I need?2013 crf100
A shopper on Apr 23, 2020
BEST ANSWER: Unfortunately, since there are many things to consider while rejetting your bike, we recommend to look through your owners manual or contact a mechanic for recommended jet sizes.
is this a genuine Keihin jet?
A shopper on Nov 23, 2017
BEST ANSWER: No, these are the Pro-X version. However, we do have the genuine Keihin Jets as well.
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Yz450f popping-after let off throttle . just rebuilt carb all balls kit was told need 168 main 48 pilot? 2003 Mdl.
A shopper on Apr 1, 2020
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