Premium Quality replacement with BOSCH-style Alternator Charging System (refer to "Extended Information" Tab for more specific application information ) Important Note: Measure the inside (timing cover side) and outside (stator frame side) diameter of your stator ring with calipers before ordering. Brand : 123 Introducing the EnDuraLast III Charging System with heavy duty stator and rotor with increased electrical output. The EnDuraLast III uses the same Bosch design with upgraded diode board, regulator, stator, and rotor. Replaces the under performing Bosch charging system on BMW R Airhead's from 1974-1976. This charging system modernizes the electrical system on your bike at a reasonable price. Comes with a 105mm outside diameter stator (timing cover side) and stator frame side outside diameter is 107.5mm to fit BMW R 1974-1976 and Moto Guzzi 1974-1994 USE OF ODYSSEY BATTERY ( DRY CELL DESIGN) AND LITHIUM IRON BATTERY NOT RECOMMENDED OR SUPPORTED FOR WARRANTY You may care to reveiw Classic Boxer Charging book by Rick Jones for complete detailes of the finer workings of the BOSCH 3phase charging sytem: CBC-Book

• Vehicle Manufacturer: BMW R Airhead 2 Valve, Moto Guzzi with Bosch Alternator
• Application: BMW R Airhead 2 Valve, Moto Guzzi with Bosch-style Charging System
• Make/Model: BMW R Airhead 2 Valve, BMW, BMW R60, R65, R75, R80, R90, R100 1974-1976
• Model Years: 1974-1994
• Manufacturer #: BMW Rotor: 12 31 1 244 642 (240 watt / 17A ) , 12 31 8 002 347 ( 180 watt / 13 A )

Vehicle Manufacturer: BMW R Airhead 2 Valve, Moto Guzzi with Bosch Alternatorenduralast