Friction Drive Kubota dynamo works great!


New Member
Oct 10, 2010
Auburn, Ca
I ordered a 3 wire type rectifier. 2 are AC 1 is B+. The case is grounded.
"Rectifier Regulator Onan 16 17 18 19 20 22 21 23 24 HP". I believe its 20 amp.
I found it on Amazon. Dealer was Caltric. Price was $26.50 with free shipping.
If want the best check out the 2000 Shindengen FH020AA Regulator/Rectifier kit for $119.95. It is a non-shunt type. Yamaha uses these on a number of their motorcycles.
This unit does not shunt excess voltage to ground.


New Member
Aug 6, 2011
Los Angeles
Got 'er done today. Keeps my battery charged for my powerful lights. Works great, very simple. No switch needed except for the lights.
I have it mounted with a spring keeping it engaged, and a locking clutch lever to lock it dis-engaged.
I fitted bronze bushings in the pivot. I need to move the regulator from strapped to the battery, it emits a lot of heat when charging.

View attachment 49433

View attachment 49434

View attachment 49435

View attachment 49436

Do you know what the maximum amp rating is on that?