05 Yamaha F40 rough idle

yzfsxr

Cadet
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Joined
May 28, 2002
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My F40 idles very rough, is this common for it to shake
@ idle. Thanks
 

Marv

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Jul 8, 2006
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26
Re: 05 Yamaha F40 rough idle

Should not shake at idle, should be very smooth. Check your fuel lines, if it is restricting flow it will idle rough, at least my F115 does. Plug wire may also be loose, or a coil giving out.
 
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