Last issue we told you about updates for the 2005 Summit 1000 models; Ski-Doo has now informed their dealers of additional updates to be performed on 1000 SDI models, including most Summit 1000s and all Mach Zs. These machines will receive enhancements aimed at improving both performance and reliability.
Almost all of the 2005 SDI 1000 models are to get an ECU calibration update, a fuel pump update where the mechanical fuel pump is replaced with an electric one, the cable for the electronic power vales will be updated, and several pyramidal frame bolts will be updated. Mach Zs also get an EGT sensor placed in the exhaust canister.
The ECU updates reflect the latest software calibration for controlling the fuel injection, ignition timing as well as power valve operation. The fuel pump update should eliminate issues of fuel starvation before the fuel tank is empty. The E-RAVE cable update is in response to the inside lining of the cable coming out and restricting or breaking the cable. Six pyramidal frame bolts are also replaced; the new ones have locking patches to keep them from coming loose. On Mach Zs, a temp sensor is placed into the exhaust canister as the latest ECU calibration now requires this additional input.
A small number of 2005 Summit 1000s are excluded from this procedure, so check with your dealer if you are unsure if your machine is affected. Otherwise, owners of record should have been contacted to have this service performed.