there are several upgrades for these motors.i havent seen this postedso here you go.deflector pins,thermostat,hub kit(adds water to cool exhuast),newly disigned plug ,plus what ever map upgrades are needed.mine needed seven.all of these are sent out in kits from brp to your dealer.have them contact service (field tech)rep.hope this is some help to those not aware of these.really help with the problems ive been having from day one.cleared up roughness at fast pace idle!![]()