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rear cylinder running hot 2002 yamaha v-star 1100

as i posted before it feels like my rear cylinder is running hot back fire on deceleration  took plugs to dealer .they said they look good .some say plug the ais ? whats the ais what is it for ? it has stock pipes maybe modified some how .can it be the carbs are not in sinc?? help help ???


1 Comment

AIS info
Check both your intake and exhaust manifold gaskets for leaks.
Have the pipes been changed? What makes you think they have been modified?
Post a pic if you can of the mod.

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