muzzy exhaust?

[grizzly1]

just got my 2011 renne,and added a slip on muzzy,was wonderin if its nessesary to run a fuel programmar, have noticed a slight spudder at take off.she runs fine after a little throttle but hesitates on the low side.any oppinions would be greatly appreciated, thanks

[Down2Ride]

A tune would definately help. When I installed my full system, the bike ran like crap. Way too lean.

[GANDG1]

you need to run a fuel adder(best is the powercommander5),when you put the slip on you add flow which in turn your quad is running leaner then it should.good chance you burn a hole in top of your pistons.you should pull your plugs and see what they look like and if their starting to eating away at the electrode,that means you have a very lean condition (the color should be a nice tan brown you need to stop running the motor and add a fuel mapper).