FCR Quickshot 3

I did a search, nothing on long term satisfaction.

To the Keihin FCR users here that installed a Boyesen Quickshot 3:

Do you still have the Quickshot 3 installed, and did it meet your expectations?

I'm not trying to solve any problems. I'm happy with the FCRs on my little 750 motor. However the Quickshot 3 looks entertaining, so I ordered one, and want to know what I'm getting myself into.

Last time I bought something from Boyesen it was a reed cage for a '91 KTM EXC 300. That worked.

Interesting part. It's not really for twin FCR installations like what is on a Norton. Instructions are for off road singles with a slightly different version of FCR. It probably still does the same thing, and will fit, but it requires a no going back step that includes removing a check valve in the float bowl. The carburetors need to be removed, and the float bowl on the accelerator pump carburetor body has to come off. In my experience taking the bowl off is a PITA due to the rubber seal for the bowl stretching from contact with pump gas. It really does not want to go back in its groove. I'll have to order a new seal before installing it, if I ever do.

Based on the rip roaring response after 168 views, I'd have to guess nobody installed the Quickshot 3, or they just don't want to talk about it. I read a post in which Yves was talking about the Quickshot 2 on the Sunburst, and I must have hallucinated he or somebody was thinking about the Quickshot 3.

The direct way the inlet tract works on a 750/850, I'm not sure that an accel pump would improve things, at least on a stocker.
If everything is happy, the throttle response is pretty much instantaneous.
I guess maybe not so much with oversized carbs, perhaps the pump could help there?

Glen

The FCR is a pumper.
The Quickshot is just a bleed and prime, good for things like MX where external adjustment is easier or maybe if you were doing a lot of single track woods riding and the bike was loading up a bit (imho)

I never had any problems with adjustment and setting on FCR's and that goes back to the 1990's.

It looks shiny (google) so all good but would you not need two for dual FCR's.

Yep, big thumpers need a squirt off-idle, twins normally don't.

Time Warp said:

The FCR is a pumper.
The Quickshot is just a bleed and prime, good for things like MX where external adjustment is easier or maybe if you were doing a lot of single track woods riding and the bike was loading up a bit (imho)

I never had any problems with adjustment and setting on FCR's and that goes back to the 1990's.

It looks shiny (google) so all good but would you not need two for dual FCR's.

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1990's. Neat I don't remember seeing FCRs in the 1990's. Too much partying.

Nope. Only "one" accelerator pump that feeds both FCR carburetors. Looking at the pair from the rear, it is the carburetor on the right that has the accelerator pump.

Like I said initially I'm not trying to solve any problems. The 35mm FCRs on my motor work very well. Not right out of the box. Wrong forum for what I did though.

The Quickshot 3 is actually matte gold in color and doesn't shine at all. I do get your point though. Draw to it like a moth to a flame. I was hoping I could just bolt it on from underneath and tune from there, but at this moment it feels like more trouble than it's worth. I might get bored though in a couple of months and do it. Time will tell.

worntorn said:

The direct way the inlet tract works on a 750/850, I'm not sure that an accel pump would improve things, at least on a stocker.
If everything is happy, the throttle response is pretty much instantaneous.
I guess maybe not so much with oversized carbs, perhaps the pump could help there?

Glen

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I have no experience with a stock motor and the FCRs. All I know for sure is the Sudco FCR Norton kits are jetted close enough for a 750 with some head work, a 2S cam, and a lightened crank. The accelerator pump definitely helps IMO. Some have disabled it and claimed they work. The motor was under carbureted with the old 930 Amals I had originally after the motor modifications. The 1990's is when I switched to a pair of 34mm Mikuni carburetors. The Keihin FCRs are better though. They just work, if you don't mind the cold start warm up time. I did have to figure a couple of things out, but I'm very happy with them.

grandpaul said:

Yep, big thumpers need a squirt off-idle, twins normally don't.

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Of the 4 thumpers I owned and rode in AMA sanctioned Dual Sport rides and other much crazier dual sport rides, only one had a Dellorto pumper on it. It was faster with a bored out to 41mm Mikuni TM on it, but a little better around town with the 38mm Dellorto pumper. The other 3 worked alright with out accelerator pumps, but were probably a little on the rich side.

The advantage of having the pumper FCRs that I see is the carburetors can be run a little on the lean side and still take all the throttle you want to give them. Amazing fuel mileage and performance on my motor with the FCRs. Much better than Amal or Mikuni carburetors on the same motor.

BTW we talked about this for a minute a few months back. I got rid of the little hiccup I felt on the FCRs getting on and off throttle hard. Nothing to do with the accelerator pump. Tuner error took a while to find. One of the pilot fuel mixture screws felt like it was bottoming out before it actually was. I use a light touch on the screw driver looking for all the way in. I had to turn a little harder to actually get to true bottomed out. Anywho, the pilot fuel mixtures were off. Once I got both of the mixtures the same that hiccup went away. Anyway the darn things are awesome IMO.

Did you put Amal carburetors on the Dreer bike like you said you might?

OK time to open things up for going off topic. Anything goes...

Schwany said:

The advantage of having the pumper FCRs that I see is the carburetors can be run a little on the lean side and still take all the throttle you want to give them. Amazing fuel mileage and performance on my motor with the FCRs. Much better than Amal or Mikuni carburetors on the same motor.

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I would personally suggest caution with that methodology. It’s ok on a competition machine because they basically only ever accelerate, or brake!

Road bikes have different needs. Having the mid settings, ie needle, weaker than ideal means you’d be running lean, potentially dangerously lean, on a steady state throttle opening (cruising speed).

Fast Eddie said:

I would personally suggest caution with that methodology. It’s ok on a competition machine because they basically only ever accelerate, or brake!

Road bikes have different needs. Having the mid settings, ie needle, weaker than ideal means you’d be running lean, potentially dangerously lean, on a steady state throttle opening (cruising speed).

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Sure, but not the case with my tune. I've done over 2300 miles using plenty of steady state throttle on US HWY 5 with my current tune. The 2300 miles was made up of primarily 200 mile days with one 370 mile day and a few 20 mile suspension test rides in the mix. Plugs are a very light tan, but extraordinarily clean. Autolite calls it the self cleaning appearance. I use Autolite plugs, not NGK. I'm not running it intentionally lean. It is leaner than any Amal setup would have to be to prevent lean tip in though. The needle is set one needle shim richer than what I found suggested here for FCRs and the pilot circuit adjustment is a little richer. The main air is at the lean end of the suggested tuning spectrum. Thanks, but I'm good.

Schwany said:

Did you put Amal carburetors on the Dreer bike like you said you might?

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Yes, new Premiers.

The frame web prohibited installation of FCRs with any kind of filter. In Texas, you can't run a bike with no filter. (well, you CAN, but dirt will cause excessive premature wear).

Schwany said:

1990's. Neat I don't remember seeing FCRs in the 1990's. Too much partying.

Nope. Only "one" accelerator pump that feeds both FCR carburetors. Looking at the pair from the rear, it is the carburetor on the right that has the accelerator pump.

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FCR's go way back to the FZR1000 and recall first experience with them was a FZR (39's) set being cut in half to fit the pair to a Ducati 900SS belt drive race bike (There were no kits back then) and of course had forgotten the single pump chamber fed all four or two carburetors as stock.
I used them mainly as separate big singles (41's) on a Ducati twin so a pumper on each.

Time Warp said:

FCR's go way back to the FZR1000 and recall first experience with them was a FZR (39's) set being cut in half to fit the pair to a Ducati 900SS belt drive race bike (There were no kits back then) and of course had forgotten the single pump chamber fed all four or two carburetors as stock.
I used them mainly as separate big singles (41's) on a Ducati twin so a pumper on each.

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Ahh, yes indeed. I forgot that I had a set on an 1990 FZR400. I can't remember if that bank of 4 worked right out of the box though. Excuse my lack of memory regarding when the FCRs came on the market. I thought 1990 was further back in time than it actually is.