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78 GS 550 Electrical - I read the stator papers need help

  • Thread starter Thread starter markdjr
  • Start date Start date
M

markdjr

Guest
I've got a 1978 GS 550 that is two weeks new to me. When I bought it the owner told me it had a bad battery and the turn signals didn't work, probably because they were aftermarket and they might not be the right wattage. They turned on, but wouldn't flash (The relay is good).

So two issues. 1st, I used my clymer guide and used the test outlined there, According to this the alternator and rectifier are working, outputing 17v at 5k rpm. I tested the yellow wire coming from the regulator (different from rectifier, correct?) and I got nothing, leading me to believe that I need to replace this regulator. If I am correct, should I just buy the electro unit that is a rectifier/regulator combo? Also do they make one for my bike, I thought that mine was a 4 valve and they are offering one for an 8 valve.

Also, last night on the freeway at about 60mph 5k+rpm, my right turn signal started to flash (I usually manually flash them, but it worked for once). The left still would only light constant, and if I slowed down the right wouldn't work. Any ideas? Related the the problem above?

Thanks for any help.

Mark
 
Sounds like your regulator is TOAST. Yes, you can replace with a combination unit. The best place to get one is right here on this board. Do a search for member Duaneage. He buys old Honda units that are better than our Suzuki units, tests them and sells them for only $40. Hard to pass up a deal like that. :dancing:

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Think you've got some grounding / connector issues as well. 17 volts should have those flashers winking madly away. Couple of other things. Your bike is an 8-valve with the separate regulator and rectifier. The unit from Duanage will replace both. Finally, that yellow lead is the AC input from one of the stator outputs to both the regulator and one of the rectifier bridges. Can't use it to check the regulator.

If your regulator isn't toast, the ground connection for it is open. Common problem. At the very least, run the ground on it directly to battery negative. Give the whole electrical in that area a good cleaning when you change it out, or you'll be swapping parts again in a little while. Replace bullet connectors (they're terrible) with spade connectors.

Lots of threads on this stuff from Steve, Bakalorz, SPARKSS, and other knowledgeable electrical folks on the site.
 
Ok, I appreciate the inputs, I am going to start my check over again tomorrow, following the advice, I will clean up all my connections and re ground the charging system.

I just picked up a used Suzuki part no RS 2150. I believe this is a regulator/rectifier combo, please confirm. I have no way of knowing if it is good at this point (until I install it right?) But even if I do, it's only a matter of time before it goes bad right? Don't they all go bad?

Thanks for the input
 
I think I forgot

I think I forgot

Hi Mr. markdjr,

Have you received the mega-welcome? I've been collecting lots of good stuff. :dancing:

Dear fellow GS rider,

Let it be known that on this day you are cordially and formally welcomed to the GSR Forum as a Junior Member in good standing with all the rights and privileges thereof. Further let it be known that your good standing can be improved with pictures (not you, your bike)![FONT=Arial, sans-serif] [/FONT]
icon_biggrin.gif


Perhaps you've already seen these, but I like to remind all the new members. In addition to the carb rebuild series, I recommend visiting the In The Garage section via the GSR Homepage and check out the Stator Papers. There's also a lot of great information in the Old Q&A section. I have some documentation on my little BikeCliff website to help get you familiar with doing routine maintenance tasks (note that it is 850G-specific but many tasks are common to all GS bikes). Other "user contributed" informational sites include those of Mr. bwringer, Mr. tfb and Mr. robertbarr. And if your bike uses shims for valve adjustments, send an email to Mr. Steve requesting a copy of his Excel spreadsheet that helps you keep track of clearances, shim sizes and other service work.

These are some edited quotes from one of our dear beloved gurus, Mr. bwringer, with ideas on basic needs (depending on initial condition), parts, and accessories.
***********Quoted from Mr. bwringer************
Every GS850 (and most other models) has (or had) a set of well-known issues that MUST be addressed before you have a solid baseline for further troubleshooting. It's a vintage bike, and it's quite common (as in, every single GS850 I have had contact with) that there are multiple problems that have crept up and slowly gotten worse over the years. It's not like a newer vehicle, where there's generally one problem at a time.

These common issues are:

1. Intake O-rings (install NEW OEM or Viton only - common nitrile O-rings will quickly deteriorate from heat)
2. Intake Boots (install NEW -- these cannot be repaired)
3. Valve clearances (more important than most people think)
4. Carb/airbox boots
5. Airbox sealing
6. Air filter sealing
7. Petcock (install a NEW one)
8. On '79 models, install new points or Dyna electronic ignition (or at least verify that the old points are working correctly)
9. On all models, it's fairly common to have problems with the spark plug caps. These are $3 or $4 each, and often worth replacing if you're keeping the stock coils/wires.
10. Stock exhaust with NO leaks or holes -- good seals at the head and at the junctions underneath.
***********************************
Carburetor maintenance:

Replace the intake boot o-rings, and possibly the intake boots. Here's the procedure:
http://bwringer.com/gs/intakeorings.html
Here's an overview of what happens with this particular problem:
http://cycleorings.com/intake.html
You'll also want to examine the boots between the carbs and the airbox. There's a good chance these are OK, but check them over.
And finally, if things still aren't exactly right, you'll want to order a set of o-rings for BS carbs from the GS owner's best friend, Robert Barr:
http://cycleorings.com
Once you receive these rare rings of delight, then you'll want to thoroughly clean and rebuild your carburetors. Here are step-by-step instructions that make this simple:
http://thegsresources.com/gs_carbrebuild.htm

***************************************
OEM Parts/Online Fiches:

I would definitely double and triple the recommendations to use Cycle Recycle II and Z1 Enterprises as much as possible. These guys are priceless resources. Z1 tends to have slightly better prices, CRC2 has a wider range of goodies available. If you're near Indy and can bring in an old part to match, CRC2 has a vast inventory of used parts.
http://denniskirk.com - Put in your bike model and see what they have.
http://oldbikebarn.com - seems to be slowly regaining a decent reputation, but it's still caveat emptor. They don't have anything you can't get elsewhere at a better price anyway.
http://www.babbittsonline.com/ - Decent parts prices. Spendy shipping. Don't give you part numbers at all. Useful cross-reference if you obtain a part number elsewhere. Efficient service.
http://bikebandit.com - Fastest. Middlin' prices. Uses their own parts numbering system to obfuscate price comparisons -- can be very confusing for large orders. Cheapest shipping, so total cost usually isn't too bad.
http://flatoutmotorcycles.com - Slow. Cheapest parts prices, crazy shipping costs. Don't expect progress updates or much communication. Real Suzuki part numbers.
http://alpha-sports.com - Exorbitant parts prices. Different type of fiche interface that's quite useful at times, especially with superceded part numbers. Real parts numbers. Shipping cost and speed unknown due to insane, unholy pricing.

Stainless Bolts, Viton o-rings, metric taps, dies, assorted hard-to-find supplies and materials, etc:

http://mcmaster.com - Fast, cheap shipping, good prices. No order minimum, but many items like bolts come in packs of 25 or 50. Excellent resource.
http://motorcycleseatcovers.com - Great quality, perfect fit (on original seat foam), and available for pretty much every bike ever made. Avoid the textured vinyl -- it's perforated.
http://newenough.com - You DO have riding gear, don't you? Great clearances, always outstanding prices and impeccable service.
***************End Quote**********************
Additional parts/info links:

GSR Forum member Mr. duaneage has great used upgraded Honda regulator/rectifiers for our bikes. Send him a PM.
New electrical parts:
http://stores.ebay.com/RMSTATOR or http://www.rmstator.com/
http://www.ricksmotorsportelectrics.com/index.php
http://www.electrosport.com/
For valve cover and breather cover gaskets, I recommend Real Gaskets (reusable silicon):
http://www.realgaskets.com
Carolina Cycle
http://www.carolinacycle.com
Ron Ayers Motorsports
http://www.ronayers.com
MR Cycles
http://www.mrcycles.com
Moto Grid
http://www.motogrid.com
Salvage/Used
http://www.ricepaddymotorcycles.com
http://www.ozpowersports.com/
If all else fails, try this:
http://www.used-motorcycle-parts.org/
Used bike buying checklists:
http://www.amadirectlink.com/roadride/Riderresc/checklist.asp
http://www.clarity.net/~adam/buying-bike.html
Lots of good info/pictures here:
http://www.suzukicycles.org
http://www.cyclechaos.com/wiki/Motorcycle_Wiki
http://www.bikepics.com
Basic motorcycle maintenance/repair:
http://www.dansmc.com/mc_repaircourse.htm
Online Clymer manuals:
http://search.ebscohost.com/ Click on "Small Engine Repair" then "Motorcycles". User=library, password=library. Note: This link may not work if you are on a school campus.

Thanks for joining us. Keep us informed of your progress. There's lots of good folk with good experience here.

Thank you for your indulgence,

BassCliff
(The unofficial GSR greeter)
walmart_greeter2.jpg

Click here to visit BikeCliff's website.
 
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