Thread: Timing Question
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Old 05-28-2026, 07:14 PM
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VCho455 VCho455 is offline
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Have you synchronized your carbs? Getting dual Weber setups to sync up is a pain but a necessary step. Having your carbs snchronized means that both idle circuits in the separate carburetors are matched and supplying their respective cylinders the same amount of air and fuel. Otherwise the engine is running one carb and half the cylinders. When that happens and your adjusting the weak carb you will find it unresponsive then it goes over responsive and round and round you go chasing your tail.

There is lots of information on interweb about synching Webers, especially from folks with boxer engines. Those mostly run downdraft versions so you want to look to the inline engine folks as some the tools used on downdraft carbs won't work on sidedraft engines.

What are your camshaft specs? That could play into your high idle and low vacuum numbers.

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