alternator to replace  3 inch Dynamos  in Norton Twins

 
71 98 499 20N

price and availability

(Back plate and gear not supplied. Plate however available!)

Essential properties:

• 12V/75W output, negative ground (Will be destroyed if subjected to positive ground!)
• may be used for left and for right turn
• integrated solid state regulator/rectifier
• may be used without battery
  requires than however smoothing condenser (see info)
  NOTE: output at start is not enough to make battery based ignition work without battery. Without battery only if bike has magneto based ignition!
• no internal gears, carbons or other parts subjected to wear and tear
• takes stock back plate (if slightly modified, see instructions) or our replacement backplate 
  part 71 98 499 004 N
• does not support charge control lamp

• sturdy plated steel body with alloy end caps
• diameter: 76mm
• length of body: 150mm
• shaft diameter at carriage level: 13mm
• threading in shaft: M6 (screw supplied)
• for overall dimensions see drawing here 
• weight: 2.3kg
• fixed red plus wire of ca 1m length (to be cut as needed)

• 12V/75W (at 8000 shaft revs which is about 6000 engine speed)

• negative ground only (will be destroyed if placed on positive ground!)
• integrated solid state rectifier/regulator converts the generated alternation current into direct current and stabilises it at 14.4V (the norm in 12V systems)
• if used without battery you need to install a smoothing condenser in place of the battery to get full output.

• assembly and operating instructions

• unit with the delivered parts
• view inside
• sealed bearings inside