2003 2 stroke Yam 40 3cyl 70hp carb swap?

WillyNell

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Joined
Apr 29, 2017
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Hi all,
I have heard that you can swap the carbs from a 70 to the 40 with just a bolt on process and was just wondering what year of engine i would have to get the carbs from. Also if and what rejetting will be required and what i should then advance the idle timing to.
Thanks Will
 
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