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2008 KTM 450EXC

R&D Flex Jet Fuel Mixture Screw

$32.95
Free 3-day express shipping
On orders over $99. Shipping Info
In Stock
FITS: 2008 KTM 450EXC change
 
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R&D Flex Jet Fuel Mixture Screw

Product Description

  • A simple, effective, flexible shaft design that is the new industry standard.
  • Holds its setting, loose fuel screws are a thing of the past.
  • Kit includes: Flex-Jet (remote fuel screws), bracket, screw, spring, washer, O-ring, instructions and sticker.
  • Customer Reviews
  • Ask an Expert
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(44)
4.6 out of 5 stars
5 star   34
4 star   7
3 star   1
2 star 0
1 star   2
MXSKI Location: NH
1-10 of 44
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Verified Purchaser
Location: Pasadena, MD
Great product

will be buying for all future bikes without a doubt!

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Location: Florida
Totally worth it

The R&D fuel screw is awesome. Not only because you can easily adjust it just like and idle screw know, but it also does not back out on its own. I have had a few fuel screws fall out and it sucks. I am pretty stoked on this product. I recommend R&D Flex jet to everyone.

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Verified Purchaser
Location: TN
R&D Flex Jet Fuel Mixture Screw - '07 TRX 450ER

It really should come from the factory like this. No more pulling the carb to make adjustments for temperature or altitude changes!

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Verified Purchaser
Location: Memphis, TN, USA
Remote fuel screw

This is a good product. Unfortunately four strokes hae jetting issues...this makes it very easy to adjust fuel screw.....easy to install, and to use. Whether it solves your problem or not, depends on whether you know what you are doing or not....It will not solve issues that require rejetting your carb, but if a simple fuel screw adjustment is the fix, this makes it very very easy...you can do it while still moving, lol....

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Verified Purchaser
Must have for 2012 WR250F

I bought this from my 2012 WR250F. The way the carb sits, you can't get to the end of the stock fuel screw without twisting the carb. The fuel screw is recessed about an inch into the carb, so you need something at least that long to get to it. Bit the carb sits so close to the engine that you can't fit a small screwdriver in. Adjustment was tedious. This fuel screw is fantastic. There's no reaching under the carb to adjust it like with the other aftermarket screws. The bend of the cable keeps it from rotating on its own. You can also use the logo on the end of the knob to count how many turns out the screw is. This thing is great. It took 15 minutes to put on, and most of that was getting the old fuel screw out.

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Top 1000 Contributor Verified Purchaser
Location: Oklahoma, USA
Why did I wait to buy this

This should have been a factory part when carb four strokes came out years ago. Adjusting the air/fuel mix is so easy and simple now. No more burning my hand tring to adjust the fuel screw. This product is the fix for carbed four strokes. If your bike has a carb, then this is one of those must have parts. I have installed the R&D Flex Jet on two bike, KX250F and CRF250R and I have had no problems and the parts has worked great. To me, it is a performance item to keep your bike running the best it can on that day. Simple turn of the knob and the bikes purrs like a kitten.

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Good at first.

The flex part of the screw eventually gets warped and wants to stay in position. Once this happens it becomes hard to make small adjustments because the screw wants to bend back to its warped position. It worked great in the beginning but its time for it to go.

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Verified Purchaser
Location: B'ham alabama
An absolute MUST HAVE!!!

Makes tuning your bike a BREEZE. I got this along with the R&D powerbowl and with or without the powerbowl this piece by itself will allow you to easily adjust your bikes lean or richness just as easily as adjusting the idle. I wish all the bikes came with this feature!!!!!

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Location: Florida
Messed up My bike

I bought this for an 08 YZ250F and this thing had my jetting messed up for five months. I changed several jets several times trying to troubleshoot the problem and finally pulled this thing off my bike and put the old fuel screw back in and the problem was solved. I guess I wanted to believe it was okay because it is so convenient but it did not work for me to say the least. The only time I could get my engine to go down in RPM's with this thing in was by screwing it all the way in. As soon as I started to back it out it returned to normal with less than a quarter turn. I thought I may need a smaller pilot jet to make it work so I tried several to no avail and still had the same problem. After putting the original fuel screw back in it, I once again was back at around two turns out. I went ahead and put the original pilot jet in also since I realized it was not at fault. What a five month waste of time and a lot of money. I should have known when I was told that one size fits all bikes. This may work on some bikes but was terrible on mine.

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Verified Purchaser
Location: NH
Best upgrade I've ever made

Installation was a breeze. it's ridiculous how easy it is to tune the bike for crisp throttle response and the lean pop on deceleration on cold mornings is GONE!

1-10 of 44
Total Questions (2)
Questions with answers:
  1
Questions without answers:
  1
1-2 of 2
Bowerbird100 2 months ago Location: Nsw
Are there several different size/type flex jet fuel screws?
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
MotoSport Staff Expert
2 months ago Location: Portland, OR, USA
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.
Top 250 Contributor Top 500 Contributor
1 month 28 days ago Location: Warner, NH
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.
bill 4 months 11 days ago Location: Walla Walla, WA, USA
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?
1-2 of 2

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