JD Jetting Jet Kit

Choose a vehicle:

User Tip: If you're unsure of your vehicle type, you may skip the machine type selection box.

» Log in to use your Rider Profile Machines
JD Jetting Jet Kit
  • View Larger
  • Multiple Views
  • Video

JD Jetting Jet Kit

Our Price: $64.99$98.99

View Product Details

Select type, year, make and model above

Live Help
  • "Customer service is priority #1 at Rocky Mountain ATV/MC. We value our customers and strive to be the best shopping experience- when you buy from us, you are buying lifetime service."

    -Dan Thomas, CEO and Founder

  • Returns

    We take pride in offering no hassle returns. In the event of a return, please call, email or chat with us to receive a solution to the problem. For apparel that doesn't fit quite right, Click here to see our Fit Guaranteed Program.

  • Warranties

    We will stand behind all products we sell with regards to manufacturing defects in workmanship and material. Most products are limited to the manufacturer's warranty. However, we will do everything in our power to take care of the problem.

  • Have questions?

    Live Help (Leave email if after hours)
    Email: sales@rockymountainatv.com
    Call us: 1 800 336-5437
    7am-7pm Mon-Fri 8am-4pm Sat (Mountain Standard Time)

Additional Videos

JD Jetting Motorcycle Jet Kit

How to - Adjust The Position Of Your Carburetor Needle

Top 5 Must Have 2 Stroke Motorcycle Tools

How to - properly clean a carburetor

RM YouTube Channel

Details

    With a jetting selection sampled from the most popular settings and well known riders from all over the world, the JD Jetting Jet Kit is designed to give you pro-level performance without having to be a carburetor expert.

    This jet kit will deliver reliable fueling, but with the inclusion of multi-taper needles, you’ll also get adjustability for low and high altitudes. See the difference in performance you’ll get over stock with a JD Jetting Jet Kit.

    Specs:
  • Expert tuning setup without being an expert
  • Improves throttle response with multi-taper needles
  • Taken from the most popular riders and settings for MX and off road
  • Exceeds performance of popular EMN, DTM, and other standard factory needle options
  • Low and high altitude designed triple taper needles
  • Main jets include spare needle clip
  • Dyno tested for proven gains
  • Developed and tested from sea level to 12000ft elevation

JD Jetting Jet Kit Reviews

Each review submitted enters you into a
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
 
4.7 / 5.0
214 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
178
23
5
3
5
Value
4.5 / 5
Durability
4.8 / 5
Ease of Installation
4.7 / 5
Fitment
4.9 / 5
Performance
4.7 / 5
Recommend it?
Yes (105)
No (3)
Value
5 / 5
Ease of Installation
4 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Best $80 I've spent
Bought a new 2017 KTM 300 XC-W. It ran, but ran relatively poorly compared to what I'd been told about them, and what i expected. I read that this kit was the solution to the carb/jetting ills. I added a VFORCE reed cage and JD kit. Bike now runs as intended. Huge boost to the low end. Don't mess around with trying to invent a jetting solution..this is it!! Awesome

-m-2017 KTM 300 XC-W (E-Start)--
February 20, 2018
So Cal, CA, US
Age: 45-64
Gender:
Male
Weight:
221 - 250 lbs.
Height:
6'4 - 6'6
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Best to use
Yeah, it may be around $90, but so worth it. I sent James Dean an email on my specs of the gas, elevation, parts on the bike and temp outside combined with the type of riding I normally do and he answered within a day (mind you around christmas) and ever since the jetting has been on point. Easy to install with different mains, needles and a pilot jet. Highly reccomend if you dont wanna screw around with jetting as a beginner.

-m-2006 YAMAHA YZ250--
February 8, 2018
Scottsdale, AZ, US
Age: 15-24
Purchased
2 months ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
4 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Amazing!
Night and day difference for a 2012 KTM 150 XC. Don't second guess yourself -- just buy it.
January 26, 2018
Newtown, PA, US
Purchased
1 month ago
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
KTM 2018 300 XCW
Very good product. It made jetting so much easier and eliminated all the problems I was having with the Mikuni Carb.

-m-2018 KTM 300 XC-W (E-Start)--
January 19, 2018
Cincinnati , OH, US
Age: 25-44
Purchased
2 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'7 - 5'9
Value
4 / 5
Durability
4 / 5
Ease of Installation
4 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Don’t hesitate. This is a must for any two stroke.
-m-2013 KTM 300 XC-- wow! blew stoke settings out of the water!
January 16, 2018
Napa, CA, US
Age: 25-44
Purchased
1 month ago
Gender:
Male
Weight:
131 - 160 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
JD Jetting Jet Kit awesome
fast shipping easy installation my KTM XC 300 2018 is great now you feel the difference i recommend 100% this product and the fast service Rocky Mountain ATVMC

-m-2018 KTM 300 XC--
January 9, 2018
34744, FL, US
Age: 45-64
Purchased
1 month ago
Gender:
Male
Weight:
221 - 250 lbs.
Height:
6'1 - 6'3
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Makes me fast
You know you want more power. Jet kits will increase power to the bike. Instructions are included so you don't have to think when doing the install.

-m-DIRT BIKE--
January 8, 2018
Olympia, WA, US
Age: 25-44
Purchased
4 months ago
Gender:
Male
Weight:
131 - 160 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
3 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Great overall product
Installed on my DRZ 400 SM, really woke it up. Beware of the JIS screws on the bottom of the carb! I did end up having to completely remove the carburetor to finish the install, but they provide new allen head screws in the kit.

-m-2016 SUZUKI DR-Z 400SM--
January 2, 2018
Orland , CA, US
Age: 25-44
Gender:
Male
Weight:
251 - 280 lbs.
Height:
6'1 - 6'3
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
Worked great for DRZ 400
This is the best kit out there for a DRZ 400 by far. Quality parts, no hassle install, it even came with color photos in the instructions. JD Jetting is a top notch company. You won’t be sorry after be purchasing this jet kit. More power, better throttle response, this kit makes power... bottom line.

-m-2001 SUZUKI DR-Z 400E--
January 1, 2018
Calhoun , TN, US
Purchased
2 months ago
Value
4 / 5
Ease of Installation
4 / 5
Fitment
5 / 5
Performance
5 / 5
Recommend it?
Yes
DRZ400S jet kit
Well worth the money. Very good instructions and comes with 4 new bowl screws. Using this kit and doing the 3x3 mod made a noticeable difference in power and throttle response
December 30, 2017
Concord, NC, US
Purchased
2 months ago
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 12 questions Browse 12 questions and 32 answers
What size jets does this kit include? Is it just the stock set or are there options for re jetting?
Robert M on Sep 25, 2016
BEST ANSWER: The kit will include the stock jet sizes and in most kits (depends on the machine) it will usually include one or two jets close to the stock size for re jetting.
I have an aftermarket pipe, how do I account for that in the kit?
kelly C on Feb 6, 2017
BEST ANSWER: There are multiple variations allowed with the kit. Follow the instructions for altitude etc., they should be close. You might have to do some testing to fine tune your jetting but it won't take long. I have an aftermarket pipe and am at altitude (Wyoming). I followed the instructions but had to fine tune (lean out) my jetting as the recommended settings were a little rich.
Will this work with a keihin carburetor on my 2004 YZ250?
A shopper on Feb 23, 2017
BEST ANSWER: I can say for a fact that it will work on almost all the CR series carburetors that are found on all of the 450s of that time frame (some mods need to be completed on the California carbs). It will possibly work on yours as well, but it is a smaller carb. I would suspect that the jet selection in the 450 kit would be a bit on the large size, and I'd be particularly concerned about the needle profiles contained. They may also fit, but may be too long, or not have the right shape. That is assuming that you are talking about the YZF250 (4 stroke). If you actually have a YZ 250 (2 stroke), that is a totally different carb than the kit you are referring to. I bought one for a 2007 CRF450X from Rocky Mountain ATV/MC, which is why this question was directed to me. In short, I would say NO. This is not the right kit for you. I would get on line, and look up JDJetting dot com, tech at jdjetting dot com, or call them at the number on their website. (I am not allowed to include email addys. or phone #s in this reply) They will direct you to the correct product from their line, which is most likely also available from Rocky Mountain ATV/MC. I hope this helps. Good Luck!
What difference is there with buying this kit vs. just jetting my bike myself? Are the needles that much better than oem? 06 Yz250.
RANDY H on Sep 11, 2017
BEST ANSWER: I used it on a 07 Honda crf450r and it popped. After contacting the company, they offered no more guidance than was listed in the instructions. I took it to a Honda mechanic and he jetted it. It ran pretty good with the kit in, but it popped and it annoyed me. The needle was not much different than stock.
I have a 01 KTM 125sx. How much power increase can I expect from this kit?
cris n on Mar 21, 2017
BEST ANSWER: I wouldn't expect a power increase (although it can give you that) - what you're looking for with a jet kit is to make the engine respond correctly to all (most) throttle positions at any RPM range. To say it another way, you typically won't be able to discern the power difference by riding, but it should run better if done correctly.
What's included in the box?
Levi S on Oct 23, 2017
BEST ANSWER: JD kit has two needles (hot and cold weather), one needle clip and 5 main jets, and instructions, problem list and suggestions..

150

155

158

160

165
Can I get replacement directions?
robert l on Feb 11, 2018
BEST ANSWER: JD jet kits usually have instructions with them. If they do not, just go to their website and download a .pdf. If you need to, give them a call, their customer service is awesome.
I have a 95 yz250 and ride at 8000 feet elevation and do a lot of free riding and jumps and my bike is running really rich and fouls plugs what kit do I need?
Earl B on Feb 21, 2018
BEST ANSWER: If you buy the JD kit then you'll get all the parts you need (pilot jet, main jets, needles, etc) and instructions to help get you in the right ballpark in terms of jetting for your altitude and riding conditions. Then if you're still having issues you'll have access to their support to help you adjust it from there. I can't speak for your YZ250 specifically, but I've used these kits in a few bikes with good success just using their recommended settings at whatever altitude I'm at (between 5-12k).
I have already purchesed a kit but need a replacment needle due to dirt getting in my carb and damaging it, where can i get one?
konner p on Jan 22, 2018
BEST ANSWER: email james dean
Do you stock the JD jetting kit for the DR-Z400E? (2017)
A shopper on Dec 20, 2017
BEST ANSWER: To see if this part will fit your machine please enter the make, model, and year into our "Choose a vehicle" drop down boxes found above the product image. If your machine is not listed, we may not carry the right item for your application. If you have a 2018 year model but don't see your machine as an option, please contact a tech via Live Chat or call us at 1-800-336-5437 for assistance.
What one will work for klx250?
A shopper on Dec 2, 2017
BEST ANSWER: To see if this part will fit your machine please enter the make, model, and year into our "Choose a vehicle" drop down boxes found above the product image. If your machine is not listed, we may not carry the right item for your application. If you have a 2018 year model but don't see your machine as an option, please contact a tech via Live Chat or call us at 1-800-336-5437 for assistance.
Does Rocky offer the JD jet kit for a 2017 Beta Xtrainer?
A shopper on Jul 24, 2017
BEST ANSWER: Unfortunately, we are not carrying the JD Jetting kits for this machine. However, I will send your suggestion to our purchasing department for consideration.
RM Cash ProgramParts Finder