All 2005 Ski-Doo Summit Highmark 1000 SDIs should have the pulse fitting on the crankcase replaced (by your Ski-Doo dealer) to eliminate fuel starvation and bogging. In addition to the pulse fitting, the ECM will be reprogrammed, the fuel pump will be cleaned and the throttle position sensor (TPS) will be verified and reset. A new set of NGK BR8ECS spark plugs will also be installed as part of the update through authorized Ski-Doo dealers.
Many Summit 1000s had this service performed in February or March; if yours did not, it should have it done as Ski-Doo wants all units upgraded.
