[FCR 41] Hesitation on deceleration

1 reply to this topic
  • brad762

Posted May 28, 2005 - 11:17 AM


Hi to all.
Like my friend atreiu, I have a '91 XR 600r with 644cc, worked head, hotcams and open exhaust. The pumper is a 41mm FCR, the jetting is the same suggested in the thread, except the main jet (#185).
I have the following issue: on acceleration and at full throttle all works perfectly, but when i decelerate (also slightly), the engine becomes very irregular, and it pops. Then I have to close and reopen throttle completely, if I want that the problem ends. What happens?

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  • Rover31

Posted May 28, 2005 - 04:57 PM


my fcr came very lean. I put in a larger idle jet, I think if I remember I started with a 48 and ended up with a 60 or 62 I can't remember for sure.
If you go to sudco.com they should be able to help you.
Good Luck

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