where to buy FCR 41mm kit

[woprs50]

i tried calling Sparks twice now and the lady said she would have one of the tech guys call me back but they never did so now im looking for the best place to buy this for a good price


oh this is for my 400ex

[Quadzilla]

Do yourself a favor and get the stock (OEM) 2003 CRF450 carb from Service Honda (servicehonda.com) for $338. It's got the updated accell pump (A good thing) and bolts right up from what I'm told. It's a 40mm vs 41mm, but you won't miss 1mm at all. It's a hell of a lot cheaper than a 41mm bought from a builder and the accell pump requires no mod unlike most other FCR's.

[MIKE400EX]

Try C&D, they offer them at a real good price, and don't forget the "user friendly" idle mixture screw. I think you would be better off with a 39 though.

[cals400ex]

Originally posted by Quadzilla
Do yourself a favor and get the stock (OEM) 2003 CRF450 carb from Service Honda (servicehonda.com) for $338. It's got the updated accell pump (A good thing) and bolts right up from what I'm told. It's a 40mm vs 41mm, but you won't miss 1mm at all. It's a hell of a lot cheaper than a 41mm bought from a builder and the accell pump requires no mod unlike most other FCR's.


what is the difference between the 02, 03 and 04?? the 03 is cheapest. i think you need a different intake boot because this carb is shorter than stock from what i hear. also, rocky ridge said this 40mm fcr flows more than the 39 or 41 in the flow bench. however, by the time you get everything it may be around $400 for this carb to work. i think you need to block off the start valve and the TPS along with the new intake boot and jetting.

[EXDUNER127]

Dude, the 450R carb is a 38 not a 40mm....:rolleyes:

[Quadzilla]

Originally posted by EXDUNER127
Dude, the 450R carb is a 38 not a 40mm....:rolleyes:

It's well known that it's a 40mm (in all the mags, etc). I also just checked Honda's site to triple verify and it says under the specs "Keihin 40mm flat-side"...

[cals400ex]

Originally posted by EXDUNER127
Dude, the 450R carb is a 38 not a 40mm....:rolleyes:


i believe the crf 450 dirtbike carb is a 40mm. however, the trx 450 r carb i thought was a 42mm.

[EXDUNER127]

Sparks says he gets them in all the time and that they are 38, i dunno that is what he told me.

[400EXrider77]

the quad is a 42 and the dirtbike is a 40 (i just checked honda.com) which one are you talking about to hook up to a 400ex?

[EXDUNER127]

The tech at sparks didnt know shiznit, maybe he just wants people to but the fcr, because they told me the 450R has a 38mm.
This is off honda wesite...


Engine Type 450cc liquid-cooled single-cylinder four-stroke

Bore and Stroke 94.0mm x 64.8mm

Compression Ratio 10.5:1

Valve Train Unicam; four-valve

*Carburetion Keihin 42.0mm with throttle position sensor (TPS) *

Ignition CD with electronic advance

Starter Forward kick
you should try it....

[Quadzilla]

The dirtbike (CRF) carb (like I mentioned above) is a 40mm FCR flat-side and the quad carb (TRX450r) is a 42mm Keihin CV. Flatsides perform significantly better than CV carbs...

[woprs50]

whats the diffenence in the years on the dirtbike carb ??

i looked it up on service honda and an 02 carb is 354

an 03 carb is 338 and an 04 is like 380:confused:

[Quadzilla]

I've been told only the jetting but can't confirm that first hand. Sorry....

[Smoker]

With the CRF450 FCR, does anything need to be done with the TPS to use on a 400? Also, how much is a YZF FCR? Any cheaper?

[cals400ex]

Originally posted by Smoker
With the CRF450 FCR, does anything need to be done with the TPS to use on a 400? Also, how much is a YZF FCR? Any cheaper?


i think you can just block the TPS off with anything of your choice.