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

$36.99 $39.95
7% Off - Save $2.96

Select your bike to see if this fuel mixture screw fits
Description See Also: 74 Reviews 4 Questions Fitment Part Numbers
Item #RND0001

Read More
74 Reviews
4.7 out of 5 stars
5 Star   62 4 Star   9 3 Star   1 2 Star   0 1 Star   2
Write a Review

Write your review and you'll automatically be entered in our monthly drawing. Include an image or video to DOUBLE your chances to win!

Write Your Review Write a review to win $500
All Reviews
Verified Purchaser
Durability 4/5 Ease of Installation 5/5 Performance 4/5 Style 4/5
Easy to use

Made tuning in the air screw way easier! No fumbling around with a screw driver and having the bike get to hot from ideling to long. Must have!

Verified Purchaser
East Bend
Durability 5/5 Ease of Installation 4/5 Performance 5/5 Style 3/5
The only fuel screw I will ever own

This is such a great product. It is so easy to just reach down and tune your carb. It will never fall out like the last two aluminum ones I had. Don't waste your money on the colorful ones that will fall out somewhere on the trail or track. Spend a little more and get this one, it's more than worth it.

Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5

Verified Purchaser
Lyndhurst, Va
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Style 4/5
One of my best purchases.

Flex jet mixture screw is a must have. If you are fumbling with screwdrivers, or burning your hands trying too adjust the fuel screw, you need this part. Super easy to install. My only gripe is: I wish the would wrap a rubber band around, or tape the box it comes in. As in my case, the box came open & lost the small washer. Other than that, Great product.
Thanks,

Verified Purchaser
floriduh
Durability 5/5 Ease of Installation 3/5 Performance 5/5 Style 5/5
100% WHISKEY

Whoa! Gave my bike too much power. I literally can loop out in 7th gear every time now. I highly recommend this if you are looking to holeshot the finish line jump every single lap in reverse.

too much powerbands
still the champ tho!! gnarkillll!!!!
Verified Purchaser
Durability 5/5 Ease of Installation 4/5 Style 5/5
Great product

At first was a little difficult to adjust but then got it to adjust. Works great, idle is the best its ever been ony 2004 RMZ 250!

Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5

Easy to install and makes fine tuning very easy, even can adjust on the fly

Verified Purchaser
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Style 5/5
R&D flex jet mixture screw

If you have a hard to get to mixture screw then you're going to want this. It makes adjustments EASY as can be. If you ride in different altitudes as I do you need this

Verified Purchaser
Goldsboro, NC, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5
Motosport is a lifesaver with all amazing products

I cant say enough about motosport.com . I work on powersports for a living and they always have the parts i need at great prices to keep my business running smooth and my customers happy. The R&D flex jet is perfect for my customers who ride in all types of weather with dialing in the carb for temps and elevation at your fingertips. Its a must for any FCR carb!!

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!

See 10 More Reviews
4 Questions
Answered:   4
Not Yet:   0
Nicknackzz
R&D Flex Jet Fuel Mixture Screw
Q: Does this fit on a pit bike?
Over 3 years 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
Over 3 years 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??
Over 3 years ago
bk530
Top 100 Contributor
Over 3 years ago
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
Over 3 years 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
Q: Are there several different size/type flex jet fuel screws?
Over 4 years 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
bk530
Top 100 Contributor
Over 4 years ago
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
Over 4 years ago
A: try their website http://www.r1dean.com

They might have something for you.
MotoSportRyanT
MotoSport Staff Expert
Over 4 years ago
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.
bill
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?
Over 4 years ago
JMann569
Over 4 years ago
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.
oldman
Over 4 years ago
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.
Fitment
See all bikes that this part fits...
See Fitments
# Part Numbers
Product Variant Manufacturer Part #
R&D Flex Jet Fuel Mixture Screw FLEX-TECH FUEL SCREW
Report an Error