Page 201 of High Performance Parts for American V-Twins 2008 by S&S Cycle

1958-2008 50th ann iversary s&s® guardiantm diagnostic system the guardian diagnostic system offers engine builders and tuners some powerful tools to use with the s&s ist ignition module the guardian kit contains a software cd for pc s a translator unit and two cables one cable connects the translator to the com port of your pc and the other cable connects to the data link on the motorcycle wiring harness once connection between the computer and ist module is made the software allows access to new functions and diagnostic data s&s ist ignition modules manufactured after 10/1/03 serial number begins with e or higher letter already contain software to support the guardian diagnostic system these modules will work in all applications except 2004 06 modules manufactured after 10/1/05 serial number begins with g or higher letter are compatible with 2004 06 models in addition to the other specified applications the s&s guardian diagnostic system allows you to use a pc with a 9-pin com port to perform the following functions enable the break-in rev limit function to protect a new or rebuilt engine during break-in adjust the final rev limit modules sold with engines have a max rpm limit of 6,250 rpm max modules sold separately are set to 6,250 rpm rev limit but this can be set to any value up to 7,200 rpm look at diagnostic test codes dtcs or clear history dtcs scan tool function calibrate the speedometer in 2004 06 h-d® models look at live data rpm manifold absolute pressure engine temperature battery voltage spark timing dwell and coil current for both cylinders while the engine is running to aid in service work or performance development look at history information number of starts number of rev limiter hits after the break-in rev limit has expired amount of time spent in various operating conditions maximum temperature reached current rev limit total engine cycles running time probably the most important feature of the guardian diagnostic system is the break-in rev limiter function which protects a new or rebuilt engine from damage due to over revving during the break-in period when the break-in rev limit function is enabled the ist module tallies the hours of operation and increases the rev limit based on the hours of operation the break-in rev limiter allows s&s to offer an extra year of warranty on ist equipped engines see engine section 1 of this catalog break-in rev limits schedule hours of operation 0 to 8 8 to 16 16 to 24 24 rev limit 4,250 5,125 6,025 6,250 the final rev limit can be set to any value up to 7200 rpm using s&s guardian diagnostic software available for modules sold separately only s&s ist guardian software system requirements microsoft® window® 2000 or higher operating system pentium ii 350 mhz processor or faster/equivalent pentium iii 500 mhz or faster/equivalent preferred minimum 64 mb ram 128 mb or more recommended at least 300 mb of free hard drive space cd-rom or dvd-rom drive required for installation keyboard and mouse or equivalent pointing device 9-pin serial port for communication with ignition module note ­ if your computer does not have a 9-pin serial port a usb to serial adapter can be used order toll free 866-244-2673 6-6

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