ENGINE ELECTRONICS INC54003 Spyke, starter ring conversion kit. 102T to 66TConverts from 102 tooth to 66 tooth. Consists of a starter gear and starter ring gear. Can be used with all Spyke starter motors. Will convert from the standard 94-06 102 tooth to the earlier ring gear design with 66 tooth. The early 66 tooth design will withstand high torque starters, large displacement & high compression engines better than the late 102 tooth design.98-06 B.T.(EXCL. 2006 DYNA) FITMENT INFORMATION1998 - 2006 Softail 1998 - 2005 Dyna Part Number : 54003 54003 Spyke, starter ring conversion kit. 102T to 66TConverts from 102 tooth to 66 tooth. Consists of a starter gear and starter ring gear. Can be used with all Spyke starter motors. Will convert from the standard 94-06 102 tooth to the earlier ring gear design with 66 tooth. The early 66 tooth design will withstand high torque starters, large displacement & high compression engines better than the late 102 tooth design.98-06 B.T.(EXCL. 2006 DYNA) FITMENT INFORMATION1998 - 2006 Softail 1998 - 2005 Dyna **** PLEASE NOTE ***** : 54003 These are performance and custom aftermarket products sourced to match or exceed original specifications as an alternative to the OEM version. Any Harley-Davidson part numbers referenced are for identification purposes only.