2015 900S EPS with 36 hours on it. The rear engine/cargo passenger seat area is getting hot. The coolant temps are fine but the radiated heat is super high. Just had the dealer change the oil for the first time so Polaris can’t do any complaining and had him hook up to the PC port and check my AFR and asked him to make it a little richer and see if we could get the temps down a bit. Service guy messed for several hours and said that after some research he found out he can only READ the ratio and can not make it richer or leaner. Stated that in 2014 Polaris changed this so they could not re-adjust it and I would need to purchase a tuner and plug it into the fuel injectors and wire it up.

Is this true ? Service shops can no longer adjust the AFR on the 2015 models ? If you were to need to buy a tuner what is a good model to get? I am not a racer but mostly slow rocks so low end torque is where I like it but don’t want to kill too much of my top end. If I get a tuner should I be taking it to a dyno shop to actually do some real world adjustments ? If that is the case, should I be tossing a new exhaust at the same time before the dyno?