Fcr

Jkolb · 01-30-2012, 09:34 PM

What is an FCR and I guess I should get one, by the way everyone talks about it.

P.S. I'm ready for you guys to make fun of me for my question so let's hear it!

atv4life95 · 01-30-2012, 09:34 PM

Look it up

decentZ89 · 01-30-2012, 09:36 PM

lol yeah use the search bar and search "fcr39" its a keihin slide carb +3mm from the stock mikuni..its a biatch to tune but the results are worth it

jr7mm08 · 01-30-2012, 09:51 PM

Sparks Racing 39mm FCR Carb kit - 03-04 Suzuki LTZ 400
Sparks Racing has put together and awesome carburetor kit for the Suzuki LTZ 400. It is a Keihin Flat Side CR (FCR) 39mm. It bolts right up, works with your stock thumb throttle cable and comes pre-jetted. The stock motor resonds very well to this carb ...

Jkolb · 01-30-2012, 09:59 PM

Am I reading that right? 500 bucks?

TuckerHardRide · 01-30-2012, 10:06 PM

You can get them off a YFZ for $150-200.

Jkolb · 01-30-2012, 10:19 PM

Totally worth it or what? I feel like my z is pretty fast already.

woodsrider129 · 01-30-2012, 10:21 PM

Quote:

Originally Posted by Jkolb

Am I reading that right? 500 bucks?

It's more compact than your standard FCR carb so there won't be any clearance issues. It also matches perfectly (inside diameter) with the stock carb to head boot so there's little to no turbulence compared to the YFZ carbs. And finally, as said before, they are a direct bolt-in. No modifying or forcing it to go into place. Perfect for someone who doesn't know what an FCR is to begin with. No offense...just sayin'.
Nothing wrong with the YFZ carb. It's a great route to go if your looking to save some dough, are mechanically inclined, and have the extra time for the install and tuning.

Someone correct me if I'm wrong, but I thought I had read somewhere that the Sparks carbs are much simpler to tune than your typical FCR. Not sure why it would be though.

jasmf24 · 01-30-2012, 11:19 PM

It will rip your face off!!

spize909 · 01-31-2012, 09:09 AM

Quote:

Originally Posted by woodsrider129

It's more compact than your standard FCR carb so there won't be any clearance issues. It also matches perfectly (inside diameter) with the stock carb to head boot so there's little to no turbulence compared to the YFZ carbs. And finally, as said before, they are a direct bolt-in. No modifying or forcing it to go into place. Perfect for someone who doesn't know what an FCR is to begin with. No offense...just sayin'.
Nothing wrong with the YFZ carb. It's a great route to go if your looking to save some dough, are mechanically inclined, and have the extra time for the install and tuning.

Someone correct me if I'm wrong, but I thought I had read somewhere that the Sparks carbs are much simpler to tune than your typical FCR. Not sure why it would be though.

Easier to tune because they don't have all the crap you got to get rid of, don't need any o-ring mod, have a tapered bell so they don't need any kind of rat stack or transition ring and they don't have a leak jet.
If you got a pocket full of cash.....that's the one to get.

woodsrider129 · 01-31-2012, 10:01 AM

Quote:

Originally Posted by spize909

Easier to tune because they don't have all the crap you got to get rid of, don't need any o-ring mod, have a tapered bell so they don't need any kind of rat stack or transition ring and they don't have a leak jet.
If you got a pocket full of cash.....that's the one to get.

True, but I was referring to tuning in general (sorry for any confusion). I guess what I should be asking is....is there any advantage to running the Sparks carb over an FCR from a donor vehicle that been properly setup? Do you get any of that "FCR bog" with the Sparks carb?
I'm asking because I have both a modded YFZ carb and a CPW carb (similar to Sparks). I plan on downsizing to one bike and I'm debating on which carb to use. The CPW would typically be a no-brainer, but it doesn't have a choke, so I'm trying to decide if there are any advantages to keeping it over the YFZ carb.

spize909 · 01-31-2012, 10:16 AM

huh, mine has a choke?
The only time mine had a bog was with the needle that was in it before I changed to the ncvq needle. Never a glitch now.

woodsrider129 · 01-31-2012, 10:28 AM

I got it off eBay a few years back. No choke whatsoever. The location when the choke plunger resides isn't even machined for one. I hadn't had any trouble getting it to start the little bit that I've messed with it, but it's only been in warm weather too. Not sure if starting will be an issue in cold weather.

spize909 · 01-31-2012, 02:35 PM

I rarely need my choke. Usually a couple pumps is all it needs.

007kfx · 02-01-2012, 12:40 AM

Quote:

Originally Posted by spize909

huh, mine has a choke?
The only time mine had a bog was with the needle that was in it before I changed to the ncvq needle. Never a glitch now.

That needle made that kind of difference????? I got a bog that will thro you over the bars

...Ive only had the bike out once since the rebuild but it did do some tuning ...plug looks like chocolate milk

...I used wire in stead of o-ring...should do the same thing...I think?

01-30-2012, 09:34 PM	#1 (permalink)
Jkolb :::Eiger Rider::: Join Date: Dec 2011 Location: Twain Harte, CA Posts: 581	Fcr What is an FCR and I guess I should get one, by the way everyone talks about it. P.S. I'm ready for you guys to make fun of me for my question so let's hear it!

01-30-2012, 09:34 PM	#2 (permalink)
atv4life95 :::LT500 Rider::: Join Date: May 2011 Location: Westchester NY Posts: 1,245	Look it up __________________ 2003 Suzuki Z400 - SOLD Fully Worked & Race Ready, '98 Yamaha YZ125 - My New Toy

01-30-2012, 09:36 PM	#3 (permalink)
decentZ89 :::LT250 Rider::: Join Date: Nov 2011 Location: New York Posts: 803	lol yeah use the search bar and search "fcr39" its a keihin slide carb +3mm from the stock mikuni..its a biatch to tune but the results are worth it __________________ 2003 Suzuki Ltz 400 -got some stuff 2000 Honda XR50 - pitbike 2006 Nissan SE-R Spec-v - daily driver 1993 Jeep Wrangler - built and swapped

01-30-2012, 10:06 PM	#6 (permalink)
TuckerHardRide :::Official Spammer::: Join Date: Feb 2008 Location: PA Posts: 3,220	You can get them off a YFZ for $150-200. __________________ 2006 LTR450 Engine Mods: Yoshimira Cherry Bomb - RS-5 Full Exhaust - Inspection Plug Choke B/O Nut - Start Button JE Piston Suspension, Steering & Chassis: Flexx Bars w Turner Clamps - Precision Damper - Tag Skid Plate Powermadds - LT Fox Evol w FuelATV A-Arms - Fox Podium Rear Pro Armor Grab Bar - IMS Roll Nerf + Heel + Bumper Misc: DID X-Ring Chain - Sprocket Guard - Frame Guards - ProDesign K/S Hiper Tec 3 - ITP Beadlock Rear Rims Parted Out: 2004 LTZ400 - September 2011 QOTM

01-30-2012, 11:19 PM	#9 (permalink)
jasmf24 :::KFX 400 Rider::: Join Date: Mar 2011 Location: Pittsburgh Posts: 910	It will rip your face off!! __________________ 2004 KFX400, 12.2:1 Wiseco, HMF full exhaust, FCR-39 (170 M/ 42P/ 40L/ NCVQ, DRZ-E boot w/ compact head-stay), OSHC's, K-W valves w/ drz springs, Dyna Fs NP, Raptor Petcock, Wiseco cam chain, 400ex boot, Oversized clamp on UNI/K&N no lid, DRZ-E Base, DRZ Flywheel, LTR450 Front Shocks, blob-less ProTaper Contour bars (ATV High) w/ hot-start reverse, odi grips, Tusk nerfs, Full skids, 14/40, (R) Holeshot ITP HD (F) Rzr2, Port-N-Polish by me.

01-30-2012, 09:51 PM	#4 (permalink)
jr7mm08 :::Rookie Rider::: Join Date: Jan 2011 Location: Fort Worth TX Posts: 5	Sparks Racing 39mm FCR Carb kit - 03-04 Suzuki LTZ 400 Sparks Racing has put together and awesome carburetor kit for the Suzuki LTZ 400. It is a Keihin Flat Side CR (FCR) 39mm. It bolts right up, works with your stock thumb throttle cable and comes pre-jetted. The stock motor resonds very well to this carb ...

01-30-2012, 09:59 PM	#5 (permalink)
Jkolb :::Eiger Rider::: Join Date: Dec 2011 Location: Twain Harte, CA Posts: 581	Am I reading that right? 500 bucks?

01-30-2012, 10:19 PM	#7 (permalink)
Jkolb :::Eiger Rider::: Join Date: Dec 2011 Location: Twain Harte, CA Posts: 581	Totally worth it or what? I feel like my z is pretty fast already.

01-31-2012, 10:16 AM	#12 (permalink)
spize909 :::Get a life! You're over 5000 posts::: Join Date: Oct 2008 Location: Southern California Posts: 5,198	huh, mine has a choke? The only time mine had a bog was with the needle that was in it before I changed to the ncvq needle. Never a glitch now. __________________ 2005 Z-400 Mine *January* *2011 QOTM* 2004 Z-400 Brad'Z *October 2011 QOTM* http://www.suzukicentral.com/forums/...tm-winner.html 2004 Z-400 Wife's 1996 Sandsprite IV (sandrail) MINE Sponsors: Coors Light.............I sponsor them! *Life is tough...........it's tougher if you're stupid.*

01-31-2012, 10:28 AM	#13 (permalink)
woodsrider129 :::LT500 Rider::: Join Date: Jul 2010 Location: Owensboro, KY Posts: 1,204	I got it off eBay a few years back. No choke whatsoever. The location when the choke plunger resides isn't even machined for one. I hadn't had any trouble getting it to start the little bit that I've messed with it, but it's only been in warm weather too. Not sure if starting will be an issue in cold weather.

01-31-2012, 02:35 PM	#14 (permalink)
spize909 :::Get a life! You're over 5000 posts::: Join Date: Oct 2008 Location: Southern California Posts: 5,198	I rarely need my choke. Usually a couple pumps is all it needs. __________________ 2005 Z-400 Mine *January* *2011 QOTM* 2004 Z-400 Brad'Z *October 2011 QOTM* http://www.suzukicentral.com/forums/...tm-winner.html 2004 Z-400 Wife's 1996 Sandsprite IV (sandrail) MINE Sponsors: Coors Light.............I sponsor them! *Life is tough...........it's tougher if you're stupid.*

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