XR600 + 41mm flat slide carb=anybody?

8 replies to this topic
  • Brian_Heath

Posted February 05, 2002 - 12:56 PM


Has anyone put that mikuni carb on their 600? A mechanic here in Colorado said he did with a yoshi pipe and got guite a bit more power. If anyone did...could you let us in on mileage and power differences. What about a pumper carb? Do they even make one for the 600 air cooled jug?

  • rhh4

Posted February 05, 2002 - 01:42 PM


I put a keihin 41mm fcr on my xr6. It basically turned it into a different bike, especialy on the bottom end. I dont know about mileage, but it does not seem to have gotten any worse. Only downside is its expensive, otherwise it rips.

  • Moredesert

Posted February 05, 2002 - 08:53 PM


Two of my buddies put the 41mm flat slide on and it made a big difference. No bog on the low end. But they had older bikes with the stock 38mm. My 97 came with a 40mm so I never switched.

  • RedThunder

Posted February 06, 2002 - 02:20 PM


The XR600 from '88 to '01 had a 38mm carb. Unless the 41mm you're looking at is a pumper carb, I wouldn't waste the money.

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  • rhh4

Posted February 06, 2002 - 03:33 PM


the fcr is a 41mm flat slide pumper, if you want more info on this carb sudco is the only company I know of that makes the kit for the xr6.

  • RedThunder

Posted February 06, 2002 - 03:55 PM


Yup, the FCR is definately the best bet for the XR600.

  • ossagp

Posted February 07, 2002 - 05:57 AM


Years back i used a 40 mm round slide on an 89,,,also a 41mm mikuni that xr's only sold. I dont think i would do that again unless you are going flat tracking with the engine,,,it worked good there. If you are staying stock on the cam i dont think i would spend any money on a bigger carb,,,but I have not used one with a 'pump'.

  • mr660

Posted March 19, 2002 - 01:51 AM


i have a thumper racing 660 kit on mine with the hrc cam and a ported and polished head with fmf exhaust. i am presently doing some research on the khein fcr 41 flat slide pumper and so far i am finding out that it makes them very responsive on the bottom end and screams like a bat out of hell on top end, also it starts on the second kick when set up right. let me know if anyone has any input on this carb

  • Victor_Venturo

Posted March 19, 2002 - 10:03 PM


I have a big Mikuni that worked well on my Xr600. I is a flat slide non pumper. It got 43 MPG and made lots of power and started easily. $150 with cable 3 sets of jets and shipping.

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