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December 4th, 2021, 12:24 PM   #1
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Keihin Fcr 41 MK1 Mk2? And jettung?

Can anybody identifiy this Keihin Fcr? Is it a MK1 or Mk2? It is supposed to come off a Yamaha WR 426.
Is it a good Option for a '2000 Fe600? If yes, which jetting is a good point to start? My bike has an Akrapovic Full exhaust and smets (supermoto) camshaft.
Best, Simon
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Keihin Fcr 41 MK1 Mk2? And jettung?-_20211204_211719.jpg   Keihin Fcr 41 MK1 Mk2? And jettung?-_20211204_211700.jpg   Keihin Fcr 41 MK1 Mk2? And jettung?-_20211204_211634.jpg   Keihin Fcr 41 MK1 Mk2? And jettung?-_20211204_211616.jpg   Keihin Fcr 41 MK1 Mk2? And jettung?-_20211204_211553.jpg  

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December 4th, 2021, 12:25 PM   #2
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I Ride: Husaber FE 400 E 1998, Suzuki DR 350 SE 1998, XT 350 1992
MK2
The early mk1 has the pumper mechanism on the outside

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December 4th, 2021, 01:15 PM   #3
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Should I put my Handys on that carb or is ist better to wait for an original Husaberg 650 FCR?
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December 4th, 2021, 01:19 PM   #4
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I Ride: Husaber FE 400 E 1998, Suzuki DR 350 SE 1998, XT 350 1992
Needle is the most important part . And jets .
Change those and should be the same .
Check the stock jetting for the husaberg fcr and go from there

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December 4th, 2021, 01:41 PM   #5
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Have a close look inside to make sure the rollers haven't seized up and scored and grooved the body. If that's OK, you'd likely want to fit a new vacuum release plate too.

Its probably a 39 if it was on a 426.
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December 5th, 2021, 02:26 AM   #6
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that is the best carb - the Mk2 - so get it, even if it is a 39mm.

you'll need to get rid of that air filter adapter for the Husaberg.

I do a bespoke performance jetting kit for them (100820 on the web shop)
The AFA is 100355. you might be able to make room for the blue belmouth at 100356.

Taffy

Last edited by Taffy; December 6th, 2021 at 12:41 AM.
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December 5th, 2021, 11:50 AM   #7
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I Ride: FE 600 ´2000
According to the seller it's a FCR 41.
So I think it's a quite good catch for 150 €.

Thanks a lot for the Information. I'll wait now until it arrives, disassemble and clean it. Afterwards I'll male a list of needed parts and place an order
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December 10th, 2021, 09:18 AM   #8
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Jackpot 🥳
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December 11th, 2021, 12:50 AM   #9
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Where can I source a nice cover to remove the Tps Sensor? I do not want to cut the cable.

Unfortunately, I could only find a cover for Keihin PWK, not FCR: https://www.betaboano.com/prd/6639/0...eplacement-cap

Last edited by Duc851; December 11th, 2021 at 02:32 AM.
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December 11th, 2021, 12:38 PM   #10
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Originally Posted by Duc851 View Post
Where can I source a nice cover to remove the Tps Sensor? I do not want to cut the cable.

Unfortunately, I could only find a cover for Keihin PWK, not FCR: https://www.betaboano.com/prd/6639/0...eplacement-cap
I've made them up in my lathe out of both aluminium and delrin/nylon. Easy beginner lathe job to get them press fit.
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fcr, jettung, keihin, mk1, mk2



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