since i took the baffle out the other day the 660 wont stay at idle it shuts off
it stays on when choked and it rides fine when choke is off as long as i keep on the throttle a bit but if a get off and leave it to idle it shuts off

 

anytime you change anything in the exhaust ..you must rejet your carb..Why did you take it off anyway??try to adjust the idle screw on the bottom of your carb,thta may help..

 

you are running too lean, you need to richen your idle and probably rejet both your carbs richer as well. when you pull your choke on it richens up the circuit, causing it to run better.

 

BUT dont use it with the choke on

 

i dont no why your having proplems iv take the baffle out of two 660s and they run fine