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 Post subject: How bad is this?
PostPosted: Tue May 08, 2018 7:02 pm 
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On the street

Joined: Mon Apr 02, 2018 6:44 pm
Posts: 28
Country: USA
Bikes owned: GSXR 750 1976 GT500
Pulled the flywheel off, and this is what I found. How bad is it? Is there a way to fix it, or am I stuck buying a new one? Any ideas are greatly appreciated. Do I need the coil for the bike to actually run? This is for a 1976 GT 500


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 Post subject: Re: How bad is this?
PostPosted: Tue May 08, 2018 8:37 pm 
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Moto GP
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Joined: Mon Nov 03, 2008 10:47 am
Posts: 5940
Location: Illinois
That looks bad. I believe those are the two battery charging coils which you will need to run lights, horn etc. I think that the third coil at 5 o'clock is the ignition coil.

Look for one on ebay or see if you can get new coils and if all else fails they can be rewound. I have had coils rewound in Australia and by Kevin Mayer in Colorado. There are probably others. It can be done.


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 Post subject: Re: How bad is this?
PostPosted: Wed May 09, 2018 3:23 am 
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On the main road

Joined: Fri Aug 11, 2017 7:09 am
Posts: 179
Country: england
Bikes owned: several gt250 ramairs
looks like somebody screwed the rotor extractor bolts in too far :( d'oh!
cheers, dd.

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RGT250LC road registered. RG250 gamma engine, Ramair frame.
GT250 big bang road registered. Both pistons fire the same time. USD forks.
GT285 road registered. Overbored - 58mm and TS125 +2 pistons fitted.
GT10 road registered. '65 T10 engine, GT250 frame.


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 Post subject: Re: How bad is this?
PostPosted: Wed May 09, 2018 8:29 am 
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On the street

Joined: Mon Apr 02, 2018 6:44 pm
Posts: 28
Country: USA
Bikes owned: GSXR 750 1976 GT500
I'm assuming that I can't just solder the wires together, huh?


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 Post subject: Re: How bad is this?
PostPosted: Wed May 09, 2018 12:55 pm 
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On the main road

Joined: Fri Aug 11, 2017 7:09 am
Posts: 179
Country: england
Bikes owned: several gt250 ramairs
no mate, they won't work, file them in the bin :roll: or get them rewound?
cheers, dd.

_________________
RGT250LC road registered. RG250 gamma engine, Ramair frame.
GT250 big bang road registered. Both pistons fire the same time. USD forks.
GT285 road registered. Overbored - 58mm and TS125 +2 pistons fitted.
GT10 road registered. '65 T10 engine, GT250 frame.


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 Post subject: Re: How bad is this?
PostPosted: Wed May 09, 2018 12:56 pm 
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Yeah Man, the Interstate

Joined: Wed Jul 10, 2013 12:04 pm
Posts: 665
Country: England, UK
Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
jojob wrote:
I'm assuming that I can't just solder the wires together, huh?

Not likely to work unless you can ensure that that each wire is insulated from those around it.
+1 on the get it rewound or find a usable replacement


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 Post subject: Re: How bad is this?
PostPosted: Wed May 09, 2018 2:11 pm 
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Around the block
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Joined: Mon Jun 12, 2017 12:01 pm
Posts: 65
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
Figuring out electrical problems is not my strong suit but I would think continuity and a certain resistance measured in ohms determines if a used one you might come across is bad or on it's way out. Maybe others will chime in on that. I don't know if the GT500 service manual shows how to test them. Good Luck on whatever you decide.....as you know by now, the price of those coils available from Suzuki is enough to ruin your day....maybe a few days. :(

This must be the company (Kevin Mayer) member tz375 was referring to about rewinding them.

:arrow: http://www.mayers-mc.com/services/elect ... ecialists/" onclick="window.open(this.href);return false;"

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 Post subject: Re: How bad is this?
PostPosted: Thu May 10, 2018 7:42 am 
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Moto GP
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Joined: Mon Nov 03, 2008 10:47 am
Posts: 5940
Location: Illinois
Correct. Kevin wound a TZ250 stator coil for me a few years ago and did and excellent job.


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 Post subject: Re: How bad is this?
PostPosted: Thu May 10, 2018 11:14 am 
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Moto GP
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Joined: Mon Dec 13, 2010 4:32 pm
Posts: 3142
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
There is only one magneto stator listed on eBay & its got the same problem as yours.

Mine has some sort of silicon sealant repair on the CDI coils + one of the charging coils has a loose winding. Some duct tape was used on the wiring on the back side of the mounting plate.

Rats!

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Suzuki:
GT750 2x75
GT550 72 project & 75
GT380 72
T500 73 project
T350 69, 71 & 72 project
T250 72
Honda 85 CB650SC & 86 CB700SC
Yamaha 75 XS650
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 Post subject: Re: How bad is this?
PostPosted: Thu May 10, 2018 2:35 pm 
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Yeah Man, the Interstate

Joined: Wed Jul 10, 2013 12:04 pm
Posts: 665
Country: England, UK
Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
If you want hours of fiddly fun, you could rewind them yourself quite cheaply. Get the right gauge winding wire, count the number of old windings and make sure you wind new wire on neatly, tightly and carefully with the same amount of turns. Don't forget to scrape off the varnish from the ends when you solder them.
Sounds simple, but can be quite time-consuming and tricky.


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 Post subject: Re: How bad is this?
PostPosted: Fri May 11, 2018 11:14 am 
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Around the block
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Joined: Mon Jun 12, 2017 12:01 pm
Posts: 65
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
I am really getting curious now how much it would cost for each coil. Seems like it would only take a few minutes each, after set up, if the same size wire is used throughout each coil winding and with the machines I have been seeing.

Here is another company, in Australia.

https://www.smallcoilrewinds.com.au/ind ... ng-service" onclick="window.open(this.href);return false;


50 Edols Street, Geelong North, Victoria 3215, Australia.
Phone:- +61 3 5278 8454

Email:- enquiry@smallcoilrewinds.com.au

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 Post subject: Re: How bad is this?
PostPosted: Fri May 11, 2018 2:46 pm 
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Yeah Man, the Interstate

Joined: Wed Jul 10, 2013 12:04 pm
Posts: 665
Country: England, UK
Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
dorT500 wrote:
I am really getting curious now how much it would cost for each coil. Seems like it would only take a few minutes each, after set up, if the same size wire is used throughout each coil winding and with the machines I have been seeing.

The reels of winding cable I have last for years unless you do a lot of rewinds. But rewinding without the benefit of machinery is a pain in the bum. The problem is to get the windings tight enough by hand and then wrapping or glueing them in place so they don't spring back as soon as you let go.
I'm sure there are proper ways to do this, but I've never been shown how to do it without fingers slipping and several expletives uttered every few minutes or so. Please note, I do not claim to be an expert at this!
Last time I did it I made up a little tool to help from plywood that worked a little like a reel to reel tape player. the rotator shafts need to be a tight fit to keep the tension. You also need a couple of marks on the winding shaft so you can count how many turns you have done as it rotates.
I suggest you don't attempt to use a cordless drill to rotate it, as it is too fast. Use a hand crank instead.


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 Post subject: Re: How bad is this?
PostPosted: Fri May 11, 2018 3:14 pm 
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Around the block
User avatar

Joined: Mon Jun 12, 2017 12:01 pm
Posts: 65
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
I was just curious how much the companies above would charge member jojob to rewind all those coils for him. It may be surprisingly less than expected. If I were him I would contact that company in Australia and the other one......compare prices, consider shipping costs.....it's bound to be a lot less than $300-$400US for four or five coils from Suzuki.

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GONE.......WITH A PUFF OF SMOKE AND A BLUR OF SPOKE


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 Post subject: Re: How bad is this?
PostPosted: Fri May 11, 2018 5:22 pm 
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To the on ramp
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Joined: Sun Jul 13, 2014 7:55 pm
Posts: 236
Location: Greendale Vic, Australia
Country: Australia
Bikes owned: AS50, GS500, GT500, ex GSXR750 slabbie
Ignition alternator coil is available from Rex's by the look of it, I'd enquire with them re lighting/charging coils too.

http://www.rexs-speedshop.com/epages/es ... Stators%22


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