650 Rod (32mm Big End). Note that this rod is longer than the original rod from 2001-2002. However, nearly all these are now replaced. WAS 134mm centre to centre but these are like the 2003 and 135mm centre to centre.
Far taller pistons are made by Taffmeisters to give the proper squish and a much higher compression. The engine can cope with this as the original 2001-2002 compression was truthfully just over 8 to 1. Suitable For All 644 Engines 2001-2002 only

OEM NUMBER 21019201