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Questions tagged [lean]

A condition where the air fuel ratio is not optimal and the engine is not receiving enough fuel from the fuel system

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25 votes
4 answers
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Symptoms of Lean or Rich carb settings on a motorcycle

I have a 1981 Yamaha XS650. I recently put in K&N stock replacement filter (ie, they are in the airbox and conform to the size of the original), however they may be leading to a leaner mixture ...
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1 answer
173 views

P0171 -- System Lean Bank 1

A few questions regarding P0171 -- System Lean Bank 1: If there is a problem with the fuel-air ratio, which this is basically about, why is it limited to only one of the two engine banks of a V6? ...
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