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General Category => General Discussion => Topic started by: NCAmother on April 14, 2018, 04:52:50 PM

Title: Has anyone run Keihin FCR's on their BB motor?
Post by: NCAmother on April 14, 2018, 04:52:50 PM
I picked up a pair of ducati SS 41 fcr carbs, with the intention of running them on a raceco BB in my 850T.   Anyone done similar with the carbs, any issues and tips appreciated!
Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: guzzisteve on April 14, 2018, 05:16:11 PM
A customer had a set on his punched out late BMW airhead, worked much better than the Bings.
Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: Turin on April 14, 2018, 07:05:12 PM
I've got a set on my Lemans SE project. nice carbs and they make great sucking noises. FYI,  you need sidedraft FCRs for a Guzzi. Ducati's use a downdraft set up.


(http://thumb.ibb.co/mqv2sS/2_1_5.jpg) (http://ibb.co/mqv2sS)
Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: rocker59 on April 14, 2018, 07:31:50 PM
I've had Keihin FCR41 carbs on my Sport 1100 for 15-years.  Ordered a kit from SUDCO.

As delivered, they were set up well.  All I did was balance, set the idle and the idle air/fuel mixture, then went riding.

No maintenance since.  They're great carbs, and make the Sport 1100 a much better ride.
Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: Roebling3 on April 14, 2018, 08:10:20 PM
I put a pair on my R65, w/Luftmeister Blitz Kit (855cc, ported, big valves, dual pugged. Excellent!  R3~
Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: oldbike54 on April 14, 2018, 08:29:45 PM
I put a pair on my R65, w/Luftmeister Blitz Kit (855cc, ported, big valves, dual pugged. Excellent!  R3~

 Oh my , that must have been fun  :shocked:

 Dusty
Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: Chuck in Indiana on April 15, 2018, 08:04:03 AM
*Nice* Lemon project, Turin.  :thumb: Attaboy.
Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: NCAmother on April 15, 2018, 10:30:50 AM
I've got a set on my Lemans SE project. nice carbs and they make great sucking noises. FYI,  you need sidedraft FCRs for a Guzzi. Ducati's use a downdraft set up.


(http://thumb.ibb.co/mqv2sS/2_1_5.jpg) (http://ibb.co/mqv2sS)

Thanks Turin, great lookin' LeMans!  This is a downdraft or horizontal draft carb?

(http://thumb.ibb.co/hBSsu7/IMG_2407.jpg) (http://ibb.co/hBSsu7)


I purchased a split pair from Ed Milich, he said they came off a  '96 900SS but would work with the BB Roundfin Guzzi motor... now I'm a bit confused
Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: rocker59 on April 15, 2018, 02:09:42 PM
Look at the angle of the float bowl on the bottom of yours.

Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: NCAmother on April 15, 2018, 02:56:45 PM
Look at the angle of the float bowl on the bottom of yours.
Yep, bummer....
Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: Perazzimx14 on April 15, 2018, 03:29:32 PM
Yep, bummer....

You could give those darned old FCR's to me and I'll use them on my 900ss. I'll even cover shipping :shocked:
Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: Chuck in Indiana on April 15, 2018, 04:34:38 PM
Quote
I purchased a split pair from Ed Milich, he said they came off a  '96 900SS but would work with the BB Roundfin Guzzi motor... now I'm a bit confused

Maybe Ed will take them back??
Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: Turin on April 15, 2018, 04:45:03 PM
I'm no carb expert and Ed would know better than I would. They "shouldn't" work. You can probably sell  those FCRs and get a brand new set of Delortos and have extra money for cables etc.

I bought my FCRs from powerbarn. It's similar to the sudco kit with cables throttle tube etc. It's I ended up using the throttle/control from a late EV 1100.

FCRs aren't necessary. I went with them because my project is an ex Racebike with a seriously hopped up motor and was a basket case with no carbs included. as brought home-


(http://thumb.ibb.co/iRhb47/100_0749.jpg) (http://ibb.co/iRhb47)


(http://thumb.ibb.co/bXCtj7/flywheel.jpg) (http://ibb.co/bXCtj7)


(http://thumb.ibb.co/myLw47/100_0753.jpg) (http://ibb.co/myLw47)


Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: ohiorider on April 15, 2018, 05:10:35 PM
How much would a set of those set me back for a 1991 R100GS?  I think I'm faced with a carb rebuild including removing the butterflys and replacing the o rings that seal the butterfly shafts.  My Bings are 32mm, not 40mm.  The Keihins wouldn't be oem original, but neither is the starter motor or the ignition system (new starter motor, bean can and 'ECU' courtesy of Rick Jones, Motorrad Elektrik.)

Bob
Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: Turin on April 15, 2018, 05:33:25 PM
Sudco and Powerbarn offer a kit for the Guzzi 1100 sport and that is it as far as Guzzi's go. Keihin does list both the 37 and 39 FCR for the R100. Probably not cheap. I'd call on of the above and ask.
Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: Roebling3 on April 15, 2018, 07:57:23 PM
Dusty: I had that engine blueprinted. I was drinking a lot of Kool-Aid @ the time.
A run from Montreal to near Quebec City for a bmw rally doomed an R100S, along the way. His engine broke @ ~110. Very messy. Last I heard (long ago, now), that bike with my original engine wound up as  a home brew GS.  R3~ 
Title: Re: Has anyone run Keihin FCR's on their BB motor?
Post by: Rough Edge racing on April 16, 2018, 05:55:52 PM
You could give those darned old FCR's to me and I'll use them on my 900ss. I'll even cover shipping :shocked:

  You still have the stock 38mm Mikuni CV's on the engine? I know a few tricks to make them function better ...That's if you think yours  need help