[Changing needle on an 06 450R FCR carb] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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Changing needle on an 06 450R FCR carb
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Posted by: Quadster450

Just finished jetting my 06 Honda 450R so i figured i'd post some instructions and picutures of changing the needle. Changing the needle is a little more involved than changing the main jet.

To get to the top of the carb, you'll have to take off the tank and plastic. You may want to loosed the two clamp screws on both sides of the carb so you can rotate it little bit. Once you have access to the carb, you'll need a 3mm allen to remove the two screws as shown

Posted by: Quadster450

Once the cover is off, you'll need a 4mm allen to remove the needle retainer that sits at the bottom.

Posted by: Quadster450

After you take out the retainer, you'll need some small needle nose pliers or tweezers to pull out the needle. If you happen to have taken the carb completely out, you can turn it upside down and just shake it out

Posted by: Quadster450

once you removed the old needle, make sure you've set the clip position you want on the new needle and drop it in the hole. Reverse the process to reinstall eveything. The picture below is showing both the needle and retainer removed.

Posted by: Quadster450

Here's a picture of the original needle - on the bottom - and the replacment needle - on the top. Note that the original needle was not adjustable! It looks like it was set for about the 3rd position if it were. For my needs though, I have set the clip at the fourth position. For this carb you can use either the HRC needle or the CRF 450 needle, both available from Honda.

Posted by: 1fst400

nice write up.

An easier way to get the needle out is stab the throttle quick and be ready to grab the needle because it should fly out. Kinda like when the toast pops out of the toaster when its done.

just my .02

Posted by: CWILKES7

Really great info........Thanks for all detail. I am novice at working on bikes but have been learning on the fly adding mods to new TRX450R. Everyone says that Jetting is easier than changing the needle but can you run down the steps I need to take?? Do I have to pull the carb all the way off?? Any help would be appreciated..........Thanks again

Posted by: Quadster450

when changing the needle, leak jet or pilot jet, you do not have to pull the carb completely off the bike but you need to loosen it enough to be able to access the bowl screws and stuff. I loosen mine enough so i can twist it out of the clamps - you want to be able to see what you're doing. Having a second person and a flashlight is also pretty handy, but not necessary. The main jet is a little easier, it's located underneath the carb (you will probably want to loosen the clamps so you can rotate the carb just a bit) but all you would need is, i think it' s 17 mm wrench, unloosen that and the main jet is located right up inside.

Posted by: CWILKES7

I have the jets installed and the needle but didnt do a good job of marking where the hoses hook back up to........can you put a few pictures up that show where each hose hooks to?? It would really help......Thanks

Posted by: Quadster450

I'll try to put some up later tonight...

Posted by: CWILKES7

Cool.......It would help......Thanks again for illustrations on changing the needle......was painless........Thanks

Posted by: 86Rryder

I have a 07..My retainer on top of the slide does not take the 4mm allen. It takes an 8mm socket. I have an hrc needle to put in, But, it just goes right through the retainer? Mt stock needle has like a small flange on it, that is what holds it into the retainer, then you put the little clip back on. Are the retainers diff on the 06/07. Because mine is not like the one in the pic.

Posted by: Quadster450

Yes, the 2007's have a different needle assembly than the 06's. Good observation! Also I understand the older needles should work in the new carb...

Posted by: shavedeclipse

hello and thanks for all the info i have this carb on a 440 and i think the person that had it before might have had a stock exhaust so every time i turn the bike off it back fires and off the bat its sluggish does any one know what to do .. i am thinking i need to change the jets what do you guys think and what jets to use i have a pro circuit t-4 exhaust thanks

Posted by: Fatal

Wow your carb look like mine and it come from a yfz450 how many feet are you from the water ?

Posted by: shavedeclipse

what do you mean how many feet from water?

Posted by: Fatal

Your needle clip is adjusted if your are in montain or not (latitude) i think