Magna Owners Of Texas

Public Forums => The Garage => Topic started by: Brad Badgett on April 17, 2010, 02:01:59 PM

Title: Another R/R bites the dust
Post by: Brad Badgett on April 17, 2010, 02:01:59 PM
Riding Wed afternoon in SW OK, the '96 left me stranded.  Had been running great since the carb clean last month.  Riding at 70mph, noticed the tach was slowly going down while maintaining 70mph.  At a red light ~4 mis later the motor quit.  Rolled her off the highway, checked the battery cables, fuses, no lights, headlight, nothing.  A local patolman stopped, and called the Chickasha Honda dealer to trailer the '96 to their shop.  They called today that the R/R was toast.  Also, a large nail in the rear tire (so a new tire).  May buy an extra R/R  in a few months to carry on trips.

Brad Badgett
MOOT #164
OK Region
1996 VF750C
Title: Re: Another R/R bites the dust
Post by: Jerry G Turner on April 17, 2010, 07:15:37 PM
Just wondering how many miles do you have on your bike I am guessing somewhere between 22000 to 28000.
Title: Re: Another R/R bites the dust
Post by: Brad Badgett on April 17, 2010, 11:17:28 PM
Turned 43k on Wed.  Guess my luck ran out?

Brad Badgett
MOOT #164
1996 VF750C
OK Region
Title: Re: Another R/R bites the dust
Post by: Cadmandu on April 18, 2010, 06:04:52 AM
Hi Brad,

  Sorry to hear about your regulator. I have a 84 VF700C and last fall it started to get hard to start after it was hot. Then the last ride of the season it stalled after a 30 mile ride and would not start again. This spring I found that the molex connector that goes from the stator to the R/R was rusted, corroded, and almost melted together. It took out my battery with it. I cut the connector out and spliced three male/female plastic coated spades to each wire put them together, bought a new battery and I was back in Magna land. Also, I was wondering about your towing bill. I pay 75.00 a year for AAA and it will come and get you anytime and anywhere. I'm not sure if that includes your bike too. I will call them and find out.

Dan
Title: Re: Another R/R bites the dust
Post by: Jerry G Turner on April 18, 2010, 07:46:05 AM
Quote from: Brad Badgett on April 17, 2010, 11:17:28 PM
Turned 43k on Wed.  Guess my luck ran out?

Brad Badgett
MOOT #164
1996 VF750C
OK Region

Well that blew my theory
Title: Re: Another R/R bites the dust
Post by: BudMan on April 18, 2010, 08:27:16 AM
Here is some information I cut out of the AMA site:

AMA Roadside Assistance—available FREE with selected memberships--you'll never ride alone.
Here's how it works: Just sign up on line, and choose to automatically renew your annual membership via your credit card, and we'll immediately enroll you in the AMA Roadside Assistance program, which includes:
24-hour roadside assistance for your motorcycles and all the rest of your vehicles, including cars, trucks, RVs and trailers.
Coverage for your spouse and dependent children living at home or away in college.
Trip-routing, trip-interruption insurance, limited legal services and more.

I have used this when the starter went out on my car.  they hauled me all the way across Oklahoma City to the shop where I had it replaced.  The tow didn't cost me a dime.
I think this is the best coverage for the money I have ever seen.
Here's a link to the AMA.
http://www.amadirectlink.com/joinama/index.asp
Title: Re: Another R/R bites the dust
Post by: Irisheagle on April 18, 2010, 09:38:33 AM
Quote from: Cadmandu on April 18, 2010, 06:04:52 AM
This spring I found that the molex connector that goes from the stator to the R/R was rusted, corroded, and almost melted together.

I had a similar problem - connection was melted together and the wire running off the stator near that point was smoking pretty heavily. Didn't have the confidence in myself to do what you did so I just replaced the stator w/ the wire that came with it.
Title: Re: Another R/R bites the dust
Post by: Cadmandu on April 18, 2010, 11:53:41 AM
If I were u I would check the end of the connector that goes to the r/r for corrosion or melting. The stator is a three phase 300 watt 80 volt AC power source that gets changed to DC in the rectifier. So when you cut the couplers off and crimp the spades on it does not matter which leg goes to which input of the rectifier.
http://www.ioffer.com/i/84-HONDA-VF-700-VF700-MAGNA-REGULATOR-RECTIFIER-543-12-141218893?source=eisi&sq=watts+and+ac+volts+of+a+stator+on+a+84+honda+magna
Title: Re: Another R/R bites the dust
Post by: Troystg on April 18, 2010, 08:57:12 PM
Quote from: Cadmandu on April 18, 2010, 11:53:41 AM
If I were u I would check the end of the connector that goes to the r/r for corrosion or melting. The stator is a three phase 300 watt 80 volt AC power source that gets changed to DC in the rectifier. So when you cut the couplers off and crimp the spades on it does not matter which leg goes to which input of the rectifier.
http://www.ioffer.com/i/84-HONDA-VF-700-VF700-MAGNA-REGULATOR-RECTIFIER-543-12-141218893?source=eisi&sq=watts+and+ac+volts+of+a+stator+on+a+84+honda+magna

80 VAC rectified is 112 VDC!!!!  THAT regulated down to 12-14 VDC!?!?!? 

Is there something on the bike that requires that high a voltage?  Spark coil or something?
Title: Re: Another R/R bites the dust
Post by: Cadmandu on April 19, 2010, 07:08:26 PM
Hi Troy
Static test (engine not running)
Set multimeter to Rx1
Unplug the stator from the wire harness.
3 yellow wires - call them A, B and C
Using both meter leads, touch every combination of 2 wires (on the stator side of the connector).
Don't even be concerned about the color of the meter leads for now.
Touch one meter lead to A and the other to B
Then A & C
Then B & C
Each test you want the meter's needle to swing (if digital, the numbers to increase).
That tells you that the circuit you are testing is good and no wires are broken.
AB - AC - BC
If there's no movement on the meter, that circuit is broken and the stator should be replaced.

Next you want to test to see if any wires are shorting to ground.
Set meter to Rx1
Disconnect stator from wire harness.
Attach one meter lead to ground (battery, motor mount bolt, frame, any dark green wire).
Doesn't matter which color lead touches ground.
Next touch each yellow wire, one at a time (on the stator side of the connetor).
Now you want no movement from your meter.
Touch A - then B - then C
If the needle swings (or numbers increase), that's telling you one of the stator wires is shorting to ground and the stator should be replaced.

Next test is with the engine running, to check the stator's output.
Meter to 100acV (ac volts)
Stator unpluged from the wire harness.
Doesn't mater which color meter wire goes where, just like the first test.
Same test procedure as the first one.
With one meter wire touching A and the other touching B, rev up the engine.
The output should swing the meter to 100 ac volts and more.
Depending on the RPMs of the engine.
Then test A&C
Then test B&C
If any test produces less than 50 volts, the stator should be replaced.
Title: Re: Another R/R bites the dust
Post by: Troystg on April 20, 2010, 05:06:57 PM
Hi cadmandu-

Thanks for the procedure but at this time (knock on wood) there is nothing wrong with my bike other than the rider. 

I am just curious as to why the voltage is so high.  Again I can only ASSUME it is for spark, but that is a lot of voltage to drop for the 12 volt lighting and starter system.

Side note, I still use (and bet my life on) my original Fluke 87 I bought in 1987 with my high school graduation money.  >20 years and it is still working flawlessly.  I have had it bench checked twice with PMEL.    :-P