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Old FCR Carb

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Hello TT,

I picked up a used FCR carb for a deal I couldn't refuse.

It's not exactly like the ones shown on TT.

The PO bought a parts bike and swapped some bits to his DR650.

The parts drz was basically stock with nothing modded (no airbox mod), just the carb swapped.

It appears to have a couple additions to it.

I checked the jets to figure out the baseline.

 

158 Main Jet

42 Pilot jet

90 other jet in the bowl

50 leak jet

100 pilot air/slow jet (could be the Main Air jet)

Nothing in the Main Air Jet hole (could be pilot air/slow jet) see pics

 

image_zps7fd0704b.jpg

image_zps690ed6dd.jpg

image_zps8c331184.jpg

image_zps10e4616f.jpg

image_zpsbef43310.jpg

 

Other than being really dirty, what does thumpertalk say?

Jet kit? Fuel Screw? Turf it?

 

Given the ok, this will be getting dropped into my SM tomorrow.

I'm still running the stock petcock so I only need to get the air nipple.

Edited by Stuwy123

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by the looks of the pics that carb is in real tough shape and very neglected.It doesn't look like that will work or work very well.The intake bell is wrong and it has a cast cable tower.it's gonna make it very tough to make your throttle cables to work right and to overcome the turbulance to the jets from the step on the mismatched intake bell with the stock air boot.If you can't afford new then you'd be much better off leaving the stock mikuni on the bike so that it will run correctly in my opinion.

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Not worth the trouble. I would say clean it up as best you can, try to sell it and put the money towards the TT FCR kit.  I got "bit" trying to make an old / used FCR work, ended up being a waste of time and money.

Edited by lowercasee
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Seeing as it came off a drz400, I'm gonna see if I can make it fit.

It has a single throttle cable setup attached to it and it returns nicely.

No signs of varnish or old gas in the carb.

Other than the dirt on the outside, the insides are spotless.

 

What about the jetting?

Edited by Stuwy123

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Do you know the guy you bought it from very well?  Since it doesn't have the removable intake bell and no adapter piece to make it fit and the cast throttle tower I would question if it has ever been on a DRZ. 

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Man, you guys are all negative nancy's today.

Buy something used and it's apparently not good enough for the guys on TT.

 

I saw the bike it came off. I know that doesn't mean it did.

The PO had no idea what carb this was or I wouldn't have gotten it for the deal I got.

When buying anything used of the internet/kijiji/craigslist, do you ever really know the owner well?

 

Enough speculation and banter.

 

QUESTION: What pieces would I possibly be missing?

Should I get a jet kit? Fuel screw? Needle?

 

3,000 feet ASL, 8-25C, low humidity. 3x3, yoshi exhaust, KN filter.

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That wont work, they told you the truth.

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It could be used if OP leaves off the throttle cable cover, runs only one cable (pull) and slants the carb ever so slightly to one side to clear the throttle cable cavity on the carb. Use a correctly sized radiator hose as an adapter for the airbox and install a manual/non vacuum petcock from a Raptor. Install a JD jet kit following the specifics for altitude and mods. Not saying it would be ideal but it would work. When I bought my SM it had the same style carb (from a Yamaha raptor 39 CR) installed as mentioned above by the PO and it ran fine but looked like Shiite. Plus it was hard to work around so I sold it to a guy for his quad he was hotrodding and bought the TT kit. I certainly would not pay a full pop for it but since you already have it, put it on with a JD kit and try it out. Worst case scenario you don't like it, put it on ebay and unload it. It's your bike, do what you want. :smirk:

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Seems like a lot of work, and potential headaches.

No harm in giving it a shot since you have it, but I personally wouldn't throw another $100 for a jet kit at it without installing it and seeing if the bike runs with this carb

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Man, you guys are all negative nancy's today.

Buy something used and it's apparently not good enough for the guys on TT.

 

I saw the bike it came off. I know that doesn't mean it did.

The PO had no idea what carb this was or I wouldn't have gotten it for the deal I got.

When buying anything used of the internet/kijiji/craigslist, do you ever really know the owner well?

 

Enough speculation and banter.

 

QUESTION: What pieces would I possibly be missing?

Should I get a jet kit? Fuel screw? Needle?

 

3,000 feet ASL, 8-25C, low humidity. 3x3, yoshi exhaust, KN filter.

Hahaha! Negative Nancy.

While I do not claim to be a Keihin expert, it looks very similar to the one that the PO installed on my bike. Although mine does have the twin throttle cables and while I have not removed it from the bike, there is an area that was "clearanced" to fit within the frame. If that makes sense. The modified area is a plastic cover where the cables connect-yours is metal. It used to have a Sudco sticker on it and when I contacted them regarding a kit, they had no record of the serial number. I've had the bike long enough to amass an additional 4000 off road miles without a problem. Although when I bought the bike it needed a new needle and seat.

Just curious... what is the number stamped on it? bumtarder seems to make some valid points though.

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The carb fits on the bike. The engine side airboot fits perfectly. Snaps right in.

The FCR is actually easier to get in and out of the bike then the stock mikuni.

The kicker is that the airbox boot doesn't reach the carb.

Hence the E-model air pipe in all the kits.

I'll see if I can spin up an adapter on the lathe tomorrow.

The throttle cable reaches and has no issues with binding.

It's looking good so far. I'll do the "eddie mod" tomorrow.

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The carb fits on the bike. The engine side airboot fits perfectly. Snaps right in.

The FCR is actually easier to get in and out of the bike then the stock mikuni.

The kicker is that the airbox boot doesn't reach the carb.

Hence the E-model air pipe in all the kits.

I'll see if I can spin up an adapter on the lathe tomorrow.

The throttle cable reaches and has no issues with binding.

It's looking good so far. I'll do the "eddie mod" tomorrow.

 

Hold the bus....the Eddie mod is not applicable for this carb, just do the O-ring mod....

I must say I am damn surprised that it fits with the throttle tower not touching the frame...You have got the carb sitting perfectly vertical.? 

100 PAJ goes on the left, 200 Main Air jet on the right..

What needle is installed.?

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What i find funny is the op said given the ok he will install. I didn't read anyone giving the ok and he still wants to install. why even ask if your mind was already made up? Just saying

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EvilRanger:

Based on the all the negativity and arm chair speculation, I had to try to install it.

I don't need TT's permission. Just saying.

 

Craigo 485sm:

Yup, it fit. It's ridiculously close to everything but it fits, vertical.

I didn't even have to swap the engine mounts.

The needle has some weird markings that (as far as I can google) doesn't match anything.

Needle : NDSR #4 clip position

Nothing in the Main Air jet Hole, not even threads.

I haven't gone back to delve into that mystery yet.

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That needle code is usually used in Yamaha yzf450 models...so that's what the carb would be from... 

Is this the carb model prefix number stamped on the side ??.....5TG7

 

@3000 ft 

NDSR clip 3 or OCEMP needle, clip 3 

do the o ring mod with wire (pic below)

Change leak jet to a #35

155 main jet

45 pilot jet

2 turns fuel screw

 

 

DSCN4146.jpg

Edited by Craigo 485sm

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Thank you for the jetting rec's (sincerely).

Is there a procedure for safety wiring that device or just tie it up?

 

I see your 5TG7 and I raise you a 5TG1

bbceffcd-a454-4379-b7e2-8d396a29fdeb_zps

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