Note1: No data has been provided for Speedstar ECU since there is no Engine Number information on them. Some have been posted here, and some have been received from other confirmed sources. Here's the 'Engine Numbers' from either the ECU or the Engine case, separated by model year. I know we all look forward to what-ever we might learn! If you have not posted here alrerady, please:Ĭheck your Frame Neck's 17-character VIN to identify the Model Year.įor 11-character VIN (Frame Number) and Special Build Frame Numbers, see: Ĭheck the sticker on your ECU (or the engine case) for your Engine Number.

Additionally, out of curiosity, it can answer the age-old question 'how many RS Warriors were built?' because the engines for Original and Midnight Warriors come off the same production line. Part of the reason for investigating this is to help identify Model Year (Yamaha factory build year) for Warrior motorcycles delivered without USA/ISO format 17-character VIN's. We found that all known Speedstar ECU's have the number 5PX-70 molded into them.We found that all known 2003+ ECU's have the number 5PX-01 molded into them.We found that all known 2002 ECU's have the number 5PX-00 molded into them.

This Original Post has been cleaned-up removing some of the early questions I had asked in favor of providing the known details.Īmong other numbers molded into the ECU case:

2008 yamaha ecu flash california