Thread: Zenith Carbs
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Old 01-05-2000, 12:31 AM
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Boy, does that sound familiar! I've been working on my twin Zeniths in my '71 250 for about 2 weeks now, and I had a similar problem as you (acceleration hesitation, stalling, etc.), but also had backfiring through the carbs. I did a complete rebuild from a kit of both and checked the flatness of the throttle body/float housing joint (which were slightly warped). I'm just now getting the hang of tuning them, but I too am concerned about incorrect float level. My Haynes manual gives only a vague description of how to measure the float, so if you get some information on the exact measurement procedure, please pass it along. Otherwise, good luck - they're a love/hate relationship waiting to happen. As a friend told me once, carburetor is French for "don't mess with it"!
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