Gregory Bender

Alternator conversion

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If you are just running stock electrics, you will find the 300 watt loop frame generator to be more than adequate. However, if you start adding lights, heated clothing, etc., you will find that the power supply is not limitless. Loop frame alternator conversions have been around for a long time in various formats. Here are a few examples.

Bob Nolan / Greg Field alternator conversion kit

Buy an alternator wiring harness

Greg Field and Bob Nolan put a loop frame alternator conversion kit together and have made it available. I have purchased and installed the kit. It is top notch in every respect and very well done. I am very pleased with how it fits and the power output is fantastic, even at idle. I have nothing but good things to say about this kit. If you are interested in purchasing it, please contact Greg Field directly at greguzzi@comcast.net. Here are some words from Greg Field describing the conversion:

Bob Nolan and I are selling a complete kit to replace the 300w generator on your V700, Ambassador, V7 Special, or Eldorado with a 600w Nippon Denso alternator.

The kit includes a new ND 600-watt alternator, a mounting bracket that replaces the generator bracket, and all wiring necessary to make it integrate with the stock wiring. It all bolts right on and requires no changes of any kind to stock parts, not even the generator-belt cover or stock wiring connectors.

The alternator is brand new and covered by an ND warranty. It has an internal regulator. Two wires are necessary to run it: one to the battery and another that connects to switched power. A third wire is optional and goes to the charging light on your dash.

The bracket is welded of 14 inch steel. It mounts to the two stock mounting bolts to the engine block. We also added a strap that bolts to the front bolt of the distributor. It will be painted. Bob and I will warranty the bracket as follows: If it cracks or breaks within a year, we'll fix or replace it.

The wiring harness consists of two wires and an adaptor connector. One wire carries the generated electricity to the battery. Another short wire connects to switched power at the coil. The adaptor connector allows attachment of the stock wiring for the generator light on your dash.

The alternator conversion kit as created by Bob Nolan and...
The alternator conversion kit as created by Bob Nolan and Greg Field. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Greg Field.

The alternator conversion kit as created by Bob Nolan and...
The alternator conversion kit as created by Bob Nolan and Greg Field. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Greg Field.

The alternator conversion kit as created by Bob Nolan and...
The alternator conversion kit as created by Bob Nolan and Greg Field. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Greg Field.

Installation notes

Installation is simple and straightforward. The included instructions are great. Do take the time to install studs to secure the bracket to the block (rather than Guzzi's original bolts).

On my maiden voyage I had trouble with the connector to the idiot light coming loose. The first time I thought perhaps I had failed to connect it. The second time I knew something was up and I gave the female spade connector a little squeeze with my pliers from the toolkit. It still wiggled loose. I solved the problem by replacing the adapter with a simple female spade connector - no more disconnects for 1,000 + miles.

Kevin Hahn's alternator conversion

Buy an alternator wiring harness

Thanks to Kevin Hahn of Scrambler Cycle for posting this information on the Yahoo! Loopframe_Guzzi news group. Kevin sells his alternator conversion as a kit.

Kevin Hahn's (of Scrambler Cycle) alternator conversion. Applicable to Moto...
Kevin Hahn's (of Scrambler Cycle) alternator conversion. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Kevin Hahn.

Kevin Hahn's (of Scrambler Cycle) alternator conversion. Applicable to Moto...
Kevin Hahn's (of Scrambler Cycle) alternator conversion. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Kevin Hahn.

Kevin Hahn's (of Scrambler Cycle) alternator conversion. Applicable to Moto...
Kevin Hahn's (of Scrambler Cycle) alternator conversion. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Kevin Hahn.

Kevin Hahn's (of Scrambler Cycle) alternator conversion. Applicable to Moto...
Kevin Hahn's (of Scrambler Cycle) alternator conversion. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Kevin Hahn.

Kevin Hahn's (of Scrambler Cycle) alternator conversion. Applicable to Moto...
Kevin Hahn's (of Scrambler Cycle) alternator conversion. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Kevin Hahn.

Kevin Hahn's (of Scrambler Cycle) alternator conversion. Applicable to Moto...
Kevin Hahn's (of Scrambler Cycle) alternator conversion. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Kevin Hahn.

Carl Krall alternator conversion

Carl has created his own alternator conversion, which uses simple materials along with the original (unmodified) generator bracket. His conversion is currently a proof of concept, but I think it holds good promise. You may read about it on Carl's blog.

Kurt Thomas' alternator conversion

Thanks to Kurt Thomas for sharing his conversion with me via e-mail. In Kurt's own words:

Tossing my hat in the ring on the generator to Denso alternator conversion, I have enclosed pictures of my conversion. I used a bandsaw and drum sander to make the adapter from 12 inch aluminum plate. I utilized the 2 top mounting bolts on the front cover. I used flat head cap screws to mount the bracket to reduce the shear loading, locate it more securely, and eliminate belt clearance issues. I made a couple round spacers to position the alternator fore/aft correctly. The triangle ears on the belt cover had to be removed, but other than that, it was bolt on. The nice part about this bracket is that it is inline with the belt tension and substantially reduces the bending moment compared with the stock generator bracket location.

Kurt Thomas' alternator conversion. Applicable to Moto Guzzi V700, V7...
Kurt Thomas' alternator conversion. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Gregory Bender.

Kurt Thomas' alternator conversion. Applicable to Moto Guzzi V700, V7...
Kurt Thomas' alternator conversion. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Gregory Bender.

Kurt Thomas' alternator conversion. Applicable to Moto Guzzi V700, V7...
Kurt Thomas' alternator conversion. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Gregory Bender.

Maynard's alternator conversion

I took these pictures of the alternator conversion Maynard (Neil Hemenway) did on his Eldorado at the Moto Guzzi National Owners Club (MGNOC) National Rally. I hope they prove useful to those interested in such a transformation.

Neil Hemenway's alternator conversion. Applicable to Moto Guzzi V700, V7...
Neil Hemenway's alternator conversion. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Gregory Bender.

Neil Hemenway's alternator conversion. Applicable to Moto Guzzi V700, V7...
Neil Hemenway's alternator conversion. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Gregory Bender.

Neil Hemenway's alternator conversion. Applicable to Moto Guzzi V700, V7...
Neil Hemenway's alternator conversion. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Gregory Bender.

Neil Hemenway's alternator conversion. Applicable to Moto Guzzi V700, V7...
Neil Hemenway's alternator conversion. Applicable to Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police motorcycles.

Photo courtesy of Gregory Bender.

Alternator details

Buy an alternator wiring harness

Thanks to Paul Linn, Kevin Hahn of Scrambler Cycle, and Charlie Mullendore of Antietam Classic Cycle for posting this information on the Yahoo! Loopframe_Guzzi news group and sending me some of this information in private e-mails.

If you want to build your own bracket and are wondering which alternator to use, the Nippon Denso 100211-1670 or Nippon Denso 100211-4520 is a great choice. Here are some cross-references:

Alternator Dimensions.
Alternator Dimensions.

Photo courtesy of Jegs.

Kubota 40 amp alternator.
Kubota 40 amp alternator.

Photo courtesy of unknown.

Kubota 40 amp alternator.
Kubota 40 amp alternator.

Photo courtesy of unknown.

Kubota 40 amp alternator.
Kubota 40 amp alternator.

Photo courtesy of unknown.

Kubota 40 amp alternator.
Kubota 40 amp alternator.

Photo courtesy of unknown.

Kubota 40 amp alternator.
Kubota 40 amp alternator.

Photo courtesy of unknown.

Powermaster 50 amp alternator.
Powermaster 50 amp alternator.

Photo courtesy of unknown.

Powermaster 50 amp alternator.
Powermaster 50 amp alternator.

Photo courtesy of unknown.

Wiring diagram for Nippon Denso alternator. Originally intended for the...
Wiring diagram for Nippon Denso alternator. Originally intended for the Suzuki Samurai.

Photo courtesy of unknown.

A more complete wiring diagram for Nippon Denso alternator. It...
A more complete wiring diagram for Nippon Denso alternator. It is unknown what the original application of this wiring diagram was for.

Photo courtesy of unknown.

The Kubota alternator is supposed to fit:

CASE Ag & Industrial
  • TRENCHERS 6010 Kubota V2203 Dsl 1997-2000
  • TRENCHERS 460 Kubota V1505-B Dsl 1994-2001
  • UNI-LOADERS 1825B Kubota Engine 1997-1999
  • UNI-LOADERS 1838 Kubota Engine 1995-1999
KUBOTA Ag & Industrial
  • EXCAVATORS KX41 Kubota D1105BH 22HP Dsl
  • EXCAVATORS KX41-2 Kubota D1105BH 21.6HP Dsl
  • EXCAVATORS KX41-2S Kubota D1105BH 21.6HP Dsl
  • EXCAVATORS KX41-2SV Kubota D1105BH 21.6HP Dsl
  • EXCAVATORS KX41-3 Kubota D902EBH 17HP Dsl
  • EXCAVATORS KX61-2 Kubota D1105BH 27HP Dsl
  • EXCAVATORS KX61-2S Kubota D1105BH 27HP Dsl
  • EXCAVATORS KX71H Kubota V1505BH 32.2HP Dsl
  • EXCAVATORS KX91-2 Kubota V1505BH 27.5HP Dsl
  • EXCAVATORS KX91-2S Kubota V1505EBH 27.5HP Dsl
  • LOADERS R310 Kubota V1305 26.6HP Dsl
  • MISC. EQUIPMENT D1005 Engine
  • MISC. EQUIPMENT V1200N Engine
  • TRACTORS - COMPACT B21TL Kubota D1005 21HP Dsl 1996-2005
  • TRACTORS - COMPACT B21TLB Kubota D1005 21HP Dsl 1996-2005
  • TRACTORS - COMPACT B7500HSD Kubota D1005-E 21HP Dsl
  • TRACTORS - COMPACT B7510DT-F Kubota D1005-E 21HP Dsl
  • TRACTORS - COMPACT B7510DT-R Kubota D1005-E 21HP Dsl
  • TRACTORS - COMPACT B7510DTN-R Kubota D1005-E 21HP Dsl
  • TRACTORS - COMPACT B7510HSD-F Kubota D1005-E 21HP Dsl
  • TRACTORS - COMPACT B7510HSD-R Kubota D1005-E 21HP Dsl
  • TRACTORS - COMPACT B7610HSD-F Kubota D1105-E 24HP Dsl
  • TRACTORS - COMPACT B7610HSD-R Kubota D1105-E 24HP Dsl
  • TRACTORS - GARDEN G2160 Kubota D782 21HP Dsl
  • TRACTORS - GARDEN G2160-R48S Kubota D782 21HP Dsl
  • TRACTORS - GARDEN G2460G Kubota WG752 24HP Gas
KUBOTA Outdoor Power Equip.
  • MOWERS - FRONT F2260-R Kubota D1005-EFM 22HP Dsl
  • MOWERS - FRONT F2400 Kubota D1105-FM 24HP Dsl
  • MOWERS - FRONT F2560-E Kubota D1105-EFM 25HP Dsl
  • MOWERS - FRONT F2560-R Kubota D1105-EFM 25HP Dsl
  • MOWERS - FRONT F2880 Kubota 28HP Diesel 2006
  • MOWERS - FRONT F2880E Kubota 28HP Diesel 2006
  • MOWERS - FRONT F3060-R Kubota V1305-FM 30HP Dsl
  • MOWERS - FRONT F3680 Kubota 36HP Diesel 2006
  • MOWERS - FRONT FZ2100 Kubota D905-FZ 21HP Dsl
  • MOWERS - FRONT FZ2400 Kubota D1105-F 24HP Dsl
  • TRACTORS - COMPACT B21TL Kubota D1005 21HP Dsl 1996-2005
  • TRACTORS - COMPACT B21TLB Kubota D1005 21HP Dsl 1996-2005
  • TRACTORS - COMPACT B7500HSD Kubota D1005-E 21HP Dsl
  • TRACTORS - COMPACT B7510DT-F Kubota D1005-E 21HP Dsl
  • TRACTORS - COMPACT B7510DT-R Kubota D1005-E 21HP Dsl
  • TRACTORS - COMPACT B7510DTN-R Kubota D1005-E 21HP Dsl
  • TRACTORS - COMPACT B7510HSD-F Kubota D1005-E 21HP Dsl
  • TRACTORS - COMPACT B7510HSD-R Kubota D1005-E 21HP Dsl
  • TRACTORS - COMPACT B7610HSD-F Kubota D1105-E 24HP Dsl
  • TRACTORS - COMPACT B7610HSD-R Kubota D1105-E 24HP Dsl
  • TRACTORS - GARDEN G2160 Kubota D782 21HP Dsl
  • TRACTORS - GARDEN G2160-R48S Kubota D782 21HP Dsl
  • TRACTORS - GARDEN G2460G Kubota WG752 24HP Gas
  • TRACTORS - LAWN TG1860 Kubota D722E-GX 18HP Dsl
  • TRACTORS - LAWN TG1860G WG590V 18HP Gas
GRASSHOPPER Outdoor Power Equip.
  • TRACTORS - LAWN 928D Kubota 28HP Dsl
GRAVELY Outdoor Power Equip.
  • TRACTORS - LAWN PM460 Kubota 30HP Dsl