Need help Charging System

[gproberts]

Diagnosing charging system,

Changed Rotor, diode pack and Regulator.

Symptom;

Only 1.2 V at DF on the alternator.
Rotor Stator is 4.1 ohms

I read that normal would be 12V at the DF.

If I short out the Ign Light I get 12 v at DF and 14.21 volts B+

Any suggestions?

[20774]

Be sure and state bike and year so we can follow what's going on.

Why did you change all those parts?

Rotor stator? There's a rotor and stator as separate parts. 4.1 ohms doesn't sound right for either the rotor or stator.

Are these voltage readings with engine off, at idle, or at some RPM?

[gproberts]

The bike was a basket case with regulator missing, starter relay seized, engine seized, no carbs, I got my moneys worth ($0) from a friend who had it in his back yard, apparently it hadden run in 15 years.

Parts were missing.

I think I might know whats wrong after carefully examining the diode configurations.

This pack (wehrle 1 244 063.3 10/05 has the three AC inputs from the rear, also two spade connectors.

It has a large spade on one side B+?

I assumed that the small connector on the other side was the D+, but on looking at it carefully the rear spade connectors 2x small could be the D+ (diodes would suggest this (small diodes x 3 black stripe)

Paul

[gproberts]

From the manual, a check between the D+ (the two little terminals off to their own and forming a T looking at the back of the board.) (From the front, they are the two bumps in the center in their own little conduction space on the left hand side fo the board.) and the B+ (Two big terminals on the side.) for voltage differences with the bike running. [B+ is the diode board output to the battery, D+ is a seperate set of diodes that feeds the regulator, and rotor field.]

[20774]

The two terminals on the back side of the board, one vertical and one horizontal are electrically identical.

Added: You should really get a quality description of the system...Rick at Motorrad Elektrik sells a good book. Also check out http://www.buchanan1.net/charge.shtml. Here's basically the same thing but with more detail... http://www.boxerworks.com/phorum/read.php?f=1&i=226928&t=226928.

[gproberts]

That did the trick the bike is now charging.

Surprisingly after 15 years outside, all I did was unseize the engine. Buy the missing bits, change the oil and off it goes.

The Tires are rotted out but will slap some new ones on tuesday. Now the big question. What do I do with it.?

Sell some of the original parts and then turn it into a cafe racer or restore?