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Old 06-06-2004, 07:26 PM   #2
Mack
Gone, but never forgotten. RIP, Mack...
 
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Joined: Sep 2002
Location: Austin, Texas USA Native Oregonian
Oddometer: 3,797
From what I am told, a properly jetted FCR often does not require any choke, just some twist to operate the accelerator pump. The more sophisticated fuel circuits seem to handle the mixing much better then the BST, hot or cold. I would first try turning up the idle a hair, or more, see if it keeps running. Remember the FCR has not one but two air adjustment screws. Both cover the 0 to 1/8 throttle, one IMS (IIRC) has the strongest effect at zero tapering to 1/8th, the other increases its effect as you get closer to 1/8th. (One is under the carb, the other is in the intake bell.)

As I understand it, the Mikuni choke plunger can be removed and installed in the Keihin, no first hand on this. Let us know what you find. Good Luck, Mack
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