magneto trouble PLEASE HELP

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thatyoder

New Member
Apr 26, 2012
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PA
hi, i was cruisin along an my engine started bogging an already knew it was my mag cuz i had this type of problem before. im using the bpr6hix iridium spark plug and a jaguar cdi. wen i hav that bogging problem i always try switching cdi's cuz sometimes the wires come loose on the jaguar. i just went through 3 mags in a matter of 2 days. all the wires are connected rite and i dont have a kill switch hooked up. could it be the magnet? im really stumped here and have no clue wats goin on. PLEASE HELP!! and when i said boggin problem i mean the bike will die and not start back up. and i also make sure that the white wire is nowhere near anything and covered good.
 
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bigbutterbean

Active Member
Jan 31, 2011
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Lebanon, PA
do you have a gasket on your mag cover? i blew two coils riding without a gasket cause the one that came on the engine didnt fit right. finally got some red hi-temp rtv and put it on the mag cover, no more problems.
 
Bikeguy Joe

Bikeguy Joe

Godfather of Motorized Bicycles
Jan 8, 2008
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up north now
3 mags in 2 days? You obviously have other problems somewhere.

Have you considered going back to stock parts? (cheap, easy to replace)
 
Venice Motor Bikes

Venice Motor Bikes

Custom Builder / Dealer/Los Angeles
Mar 20, 2008
7,272
1,810
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Los Angeles, CA.
I don't care much for those Jaguar CDIs... I tried them (& wasn't impressed), & switched back to the stock black box.

Until MSD comes out with a system for these engines, I'll stick with the stock box! :rolleyes:
 
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Al.Fisherman

Al.Fisherman

New Member
Sep 9, 2009
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Calera, Alabama
thatyoder said:
could it be the magnet? im really stumped here and have no clue wats goin on.
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You have other problems other then the magnet. I have never seen a magnet in any engine go bad...I really don't think it can under normal circumstances. Take a screwdriver and touch the magnet. Ensure your woodruff key is good. I only use the "stock" or direct replacement stock parts. I not only isolate the white wire, I remove it totally. Check all connections, and make sure they have good contact.
 
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ivan H

Member
Oct 8, 2011
622
1
16
australia
Make sure the laminate has a good conection 2 motor then put a multimeter set to AC~200 volts across blue & black wires to check. Magneto stator coils dont go out that easily. Epoxy seal a good 1 to keep from having problems with moisture. I think u'll either find its something else or something is causing them 2 die, they dont just die. Cheers
 
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thatyoder

New Member
Apr 26, 2012
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Bikeguy Joe said:
3 mags in 2 days? You obviously have other problems somewhere.

Have you considered going back to stock parts? (cheap, easy to replace)
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yes i hav considered that. the jaguar is not all that its posted up to be. the wires will keep coming off inside the box and i just ordered a dif wire for the stock box so that shuld do me good
 
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thatyoder

New Member
Apr 26, 2012
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39
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bigbutterbean said:
do you have a gasket on your mag cover? i blew two coils riding without a gasket cause the one that came on the engine didnt fit right. finally got some red hi-temp rtv and put it on the mag cover, no more problems.
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ya i got one on there. i also hav a very high temp tape wrapped around it so nothing can get in there. i took off the clutch cover an noticed sum grease build up and wondered if that was getting in the mag cover before i did all that stuff.
 
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thatyoder

New Member
Apr 26, 2012
14
0
0
39
PA
Venice Motor Bikes said:
I don't care much for those Jaguar CDIs... I tried them (& wasn't impressed), & switched back to the stock black box.

Until MSD comes out with a system for these engines, I'll stick with the stock box! :rolleyes:
Click to expand...
i agree. im not impressed with them either. all u really need to do is get a good wire an coil to replace the stock and it runs just as good if not better than the jaguar
 
porch lizard

porch lizard

New Member
Nov 7, 2011
143
3
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Scarville, Iowa
The small wire from the magneto coil to the armature on my GT5 keeps breaking. I've soldered it back together only to have it break again after a few hundred miles. The 3rd magneto is on order. I noticed that when the wire is broken, the coil can move slightly, which ( to me ) could vibrate the wire and cause it to break. Until the new magneto arrives, I've JB welded the coil ends, re-soldered the connection, and will try that. Does anyone have the same problem, or a good solution, or better quality magneto?
 
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ivan H

Member
Oct 8, 2011
622
1
16
australia
The problem is a "cold" solder join caused by the laminate core having not been hot enough during soldering. The solder has made a mechanical but not a good electrical joint 2 it. U will need a decent wattage soldering iron 2 redo it, a small iron just wont get the laminate hot enough. The resin core in the solder is a cleaning & wetting agent but needs both pieces being soldered 2 be at the correct temp for it 2 do its job. Make sure u dont over heat it as well. At the right temp u will c the solder flow evenly onto the laminate. Cheers
 
Al.Fisherman

Al.Fisherman

New Member
Sep 9, 2009
1,966
5
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Calera, Alabama
porch lizard said:
The small wire from the magneto coil to the armature on my GT5 keeps breaking. I've soldered it back together only to have it break again after a few hundred miles. The 3rd magneto is on order. I noticed that when the wire is broken, the coil can move slightly, which ( to me ) could vibrate the wire and cause it to break. Until the new magneto arrives, I've JB welded the coil ends, re-soldered the connection, and will try that. Does anyone have the same problem, or a good solution, or better quality magneto?
Click to expand...
Solder a small wire to it to lengthen, use a terminal (optional), and secure under the coil mounting screw. If no terminal is used, tint the end of the wires together, and wrap around the screw. No more worries about a cold solder joint.
 
porch lizard

porch lizard

New Member
Nov 7, 2011
143
3
0
Scarville, Iowa
Since I JB welded my magneto coil, I've not had a problem with the soldered connection. Al Fisherman, Thanks for the connection modification idea. I think if I have any more problems with this, that will be the next thing to do. It makes sense! I've only put a couple of hundred miles on the bike since the fix, and I'll have to update after more mileage.
 
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