R&D Flex Jet Fuel Mixture Screw

R&D Flex Jet Fuel Mixture Screw
R&D Flex Jet Fuel Mixture Screw

$29.99 $32.95
9% Off - Save $2.96

Select your bike to see if this fuel mixture screw fits
Description See Also: 59 Reviews 4 Questions Fitment
Item #RND0001

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59 Reviews
4.7 out of 5 stars
5 Star   53 4 Star   9 3 Star   1 2 Star   0 1 Star   2
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All Reviews
Homeslice Verified Purchaser
Washington state
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5
A must for the crf250x

I can't believe I didn't get this a long time ago!

racenjason Verified Purchaser
sac ca.
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5
Great product

This makes tuning your carb very easy .you can tune on the fly

JMann569 Verified Purchaser
Sturgis, MI 49091, USA
Durability 4/5 Ease of Installation 3/5 Performance 5/5 Style 4/5
Beats any quick adjust fuel screw!!

Ease of use is amazing! Was struggling to get tuned properly. Made it super easy! Read some reviews 1st, so before install i pulled it apart and lubricated it well. I chose a light thin coat of lithium grease. Havent had any issues yet. And it will not fall out. I am actually kind of glad i lost my spring and washer on my quick adjust fuel screw because i never would have bought this. If you read this review and choose to buy one i gurantee youll be as happy as the other reviews on here. Worth every penny!

Dirtypantalon Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 4/5
Cool invention

No more looking for that dumb red screw. And solved many problems. Lol

NorthernPride
Ct
Durability 5/5 Ease of Installation 3/5 Performance 5/5 Style 5/5
Pure power

Put this on my 08 wr450f, instantly took away the bog when you hit the throttle hard. Just a little tunning and off i went. Feels like fuel injection, well worth it on my bike.

HappyCustomer Verified Purchaser
Durability 4/5 Ease of Installation 4/5 Performance 4/5 Style 4/5
MUST HAVE

I read a lot of reviews when looking for an aftermarket fuel screw. The stock screw was completely inaccessable on my rmz250 and barely accessable on my crf250 so i knew it had to go.

Some reviews said the longer needle style would loosen up on people which concerned me, and it also would not have fit on the RMZ I'm pretty sure. Had to loosen up the carb clamps and twist it up a bit to access the fuel screw, then just unscrew, make SURE you got the washer and o-ring out, and then screw in the Flex Jet. Put it all back together and was able to effortlessly tune my idle mixture while sitting right on the bike!!!

A absolute must have.

FlemDogg Verified Purchaser Top 250 Contributor
Baker, FL 32531, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5
A must have!

An absolute must, makes air/fuel adjustments in a snap, as easy as pulling out the choke, make it easy on yourself and get this, you will not regret it!

Mike
NC
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 4/5
Very nice!!

This thing is so simple I'm upset I didn't come up with it........ The R&D works perfectly and makes it so easy to adjust your air/fuel mixture. Great device!!!

Chris Verified Purchaser
Austin, TX, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 4/5
Good Alternative to the traditional fuel screws

Easy to install, easy to adjust, and worked great. I've only had for a month but so far so good.

Motoparty MotoSport Staff
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5
Get the most out of your ride!

This thing is awesome. I ride high mountain trails one weekend and then head down to the coast to rip the sand the very next. This thing makes it cake to get the machine dialed in for the elevation. A few turns one way or the other and she purrs. Real stylish to.

nick
Billerica, MA, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5
Awesome product

Awesome product went in great and works great. It's super easy to adjust it.

Paulm856 Verified Purchaser
Carneys Point Township, NJ, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5

Makes adjustment super easy should come factory

FlyinHawaiian Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5
Yz 450F

one of my best buys! I can tune my carb for different riding conditions with ease.

MaxT Verified Purchaser
Steamboat
Durability 4/5 Ease of Installation 5/5 Performance 4/5 Style 4/5
Great for on-trail adjustments

After messing around with stubby screwdrivers on the trails in the mountains for a few months, I finally broke down and bought one. Really glad I did because now I can adjust my air screw much easier and therefore am more likely to do it before every ride as should be the case. Much easier to lean over and adjust this than to stop the bike, get off, get tools out of my pack, start the bike, fumble around with a short stubby screwdriver trying to find the fuel screw and slot, adjust the carb, stop the bike, dismount, stow tools, etc.....

One negative is that the tip is not identical to the keihin, and a pilot jet change may be needed to get back in the correct adjustment range.

Mine Top 500 Contributor Verified Purchaser
Durability 4/5 Ease of Installation 4/5 Performance 5/5 Style 3/5
Great addition

I would buy it if your thinking about it, definitely worth it, don't worry its worth it.

4strokeman Verified Purchaser
Lancaster PA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5
Jet Fuel Screw

I have used other remote fuel screws in the past. They vibrate loose and even fall out. If you have a carburetor on your bike this is a must have! Easy to use and time saving so you can ride more. Thanks.

ETXCRF Verified Purchaser
Lufkin, TX, USA
Ease of Installation 5/5 Performance 5/5 Style 5/5
Simple, but Smart

Much easier to access than other fuel screw designs. Just installed, so no rating on durability at this point. However, I expect 5 stars on that end, as well.

Chad Verified Purchaser
Ga
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Style 5/5

Best remote fuel screw

Scott11B Verified Purchaser
San Diego, CA, USA
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Style 5/5
Air Fuel adjustment screw

This is a must for makig your bike run correctly. With the screw installed, making adjustments to the air/fuel is quick and simple. Why a fine motorcycle like KTM does not have this installed at the factory is just too crazy to ask. This the best $20 you will ever spend on your bike. Don't even try to ride without getting this first. It will help you get the "bog" out of your throttle response.

oldman Verified Purchaser
California, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5
Flex cable misture jet fuel screw

Wow this makes things easy. If you make adjustments to your carb based on temperature, altitude, or racing conditions, this is the trick. We live in an area were temperatures vary greatly from early morning to late afternoon and found it difficult to adjust the standard mixture screw on CFR250R and KX250F bikes until we installed this great product. Adjustments are a snap and the mount makes it easy to get to. Of course you typically need to remove the carb to install but well worth the money and time.

R&D Flex Jet Fuel Mixture Screw
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4 Questions
Answered:   4
Not Yet:   0
Nicknackzz
Location: North Carolina, USA
Q: Does this fit on a pit bike?
1 year 7 months ago
Does the crf 70 fitment fit on a 125cc pit bike engine? lifan and all of them engines? the fuel mixture screw for my VM26 carb is under the bike so its hard to get at, would it fit on a VM26 Mikuni? and if so which do i order?
MotoSportExpert
MotoSport Staff Expert
1 year 7 months ago
A: No the R&D Flex Jet Fuel Mixture Screw will not fit the VM26 carburetor.
chance
Q: Does the flex jet, adjust the fuel to air ratio??
2 years 1 month ago
bk530
Top 250 Contributor Top 100 Contributor
2 years 1 month ago Location: Warner, NH
A: This is a fuel mixture adjuster, and by decreasing your fuel you are increasing your air. You already have this screw on your carb, this item just makes it easier to access it on the track to fine turn your ride.
MotoSportGrantK
MotoSport Staff Expert Top 1 Contributor
2 years 1 month ago
A: Yes, the R&D Flex Jet Fuel Mixture Screw will replace your stock (OEM) fuel/air mixture screw making it much easier to make adjustments with out having to use any tools.
Bowerbird100
Location: Nsw
Q: Are there several different size/type flex jet fuel screws?
2 years 6 months ago
I am trying to buy a flex jet screw for my 2000 drz400e I am aware that the flex jet screw is only made for fcr-mx and not the old slant style fcr's but I am aware of how to overcome this problem The only problem I have is that I was under the impression that there was only one flex jet screw, not several different ones. Does this mean that no matter what bike I pick from your list of comparable bikes i will get the same product? Or is there a difference
MotoSportRyanT
MotoSport Staff Expert
2 years 6 months ago Location: Portland, OR, USA
A: There is actually only one Flex Jet. The website required a bike selection so that it won't be ordered for bike it does not fit. But you are correct that there is only one flex jet that is meant to fit FCR Carburetors. Since you have plans to use this on a bike that is not listed for fitment with this, you would simply want to select any bike this would be made for to order it, for example you could select a 2008 Suzuki RMZ450 and then the website will allow you to add the item to your cart.
bk530
Top 500 Contributor Top 100 Contributor Top 250 Contributor
2 years 6 months ago Location: Warner, NH
A: this is only one size and the bike list is just to see if it would fit your model. From everything I see it is not designed for your carb.
oldman
2 years 3 months ago Location: California, USA
A: try their website http://www.r1dean.com

They might have something for you.
bill
Location: Walla Walla, WA, USA
Q: I have a 2006 crf 450 and am having a hard time getting it started only on first start starts fine after warmed up. any ideas on carb adjustments?
2 years 8 months ago
oldman
2 years 3 months ago Location: California, USA
A: Several things could be the issue but my son has the same year 250. Check your hot start operation to ensure it is not sticking. Also, the carb does have an fuel pump diaphragm and if you give the bike 4-5 shots of throttle before trying it cold that helps. His bike starts cold with choke on 1st or 2nd kick. if this does not work, try some of the 4 stroke blogs. We have also installed the Boyesen QS2.
JMann569
2 months 29 days ago Location: Sturgis, MI 49091, USA
A: Not so sure its a carb issue. Could possibly be valves are about due for some shims. But a good start is....on your fuel adjust screw, thread all the way in till it bottoms out , then take your fuel screw out 1 to 2 turns out. While running and warmed up slowly pull your hotstart the bike should idle up like the choke is on. Then you know your where you need to be on your carb adjustment. If you have had valves shimmed could be your start jet needs cleaned. Hope this helps.
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