Engine Trouble More trouble..

[aaronwilde]

So Basically when I baught this bike I had no idea what I was getting into. A month into owning it, I am fairly familiar with the mechanic side to it. I have replaced 3 magneto coils in a month. The first 2 stopped producing a spark beacuse they got wet. Everything seemed fine up until today I was riding down the side of a highway going back and forth between WOT and just under WOT for about 15 minutes. Going about 40~50kmph and all of a sudden an all to familiar put put something isnt write sound and within 30 seconds the engine isn't producing a spark anymore. So i peddle home the rest of the way and open up the magneto.. (wondering wtf is the problem because i hadnt been riding in rain or wet conditions). It seemed okay but something told me to take off the magneto coil and when I did i found a very small amount of oil on the coil. So I searched this site and google from head to toe and discovered that most likely my crank shaft seal behind the magnet rotor is probably broken or a bit loose. I took the nut off the magnet and thats as far as I have gotten today. I clamped some vice grips on the magnet and with all my strength to get that sucker off but it will NOT come loose. I was even thinking it may unscrew lol? Don't think so but also when the bike was working It would take a far amount of time to start. Id have to peddly my *** off and slowly it would go. I read that slow starting could be that same seal under the magnet being broken? I would really appreciate any info on this as I am mechanicly inclined and have the tools but I cant seem to get the magnet off. Also it has never been clear to me if a wet magneto = a dead magneto? I tried the bike again just for fun after wiping it off and it wont start now. I think my last 2 magneto's died from the same oil leak. And it seems to only leak oil when im really giving the engine full speed for long distances.

 

[bideronit13]

Welcome.
Can you take some pictures of the inside were the magneto goes with and without the magneto.

 

[aaronwilde]

I can do that for you tomorrow after work. What would that help with though lol.. It would look like any other. Magneto coil part isnt backwards/upside down. It's in properly. And the rotor magnet is too. Ill get the pics tomorrow though : ) . Also I have never taken the magnet rotor off yet.. I could not get it off.. do you know how it comes off? Does it just take alot of force?

 

[olow]

yes pics would be nice

 

[montytradition]

I don't know much at all about engines yet but wouldn't oil not be an issue if it came in contact with the magneto coil, because it doesn't conduct electricity?

 

[HeadSmess]

water...open basket.... i dont even bother with the cover and weve had the heaviest rain the last 6 months weve had in 100 years or summink... yest some can and will fry.

using the white wire as a killswitch will fry them.

on that note, mine died the other day and ive cut the white off altogether... thinking maybe a 100ohm resistor in series with the killswitch just to reduce the currents... the tiny lil wire had burnt like a fuse or just not use the killswitch...iunno...

getting the magnet off. if it doesnt just slide off easily, they can be nearly impossible

the lil woodruff key in the slot has grabbed one of the laminations. why the rotor is laminated anyway i have no idea. but when it happened on the last engine i pulled... it caused the death of the rotor itself, the end of the crank shaft from belting it with a hammer, and the crankcase half i was getting it out of...

once it gets stuck i resort to brute effort

um...and regards oil on the coil...all i can think of is that the oils breaking down the insulation? besides the buggered seal

 

[Al.Fisherman]

The magnet is held on with a key. If the key wasn't there you can remove the magnet by hand. I use a small pry bar or 90 degree needle nose pliers (as in the photo) to pop the magnet off. When installing, super glue the key in place. This way the magnet won't pick up the key from its grove.

Start at #33 and on to #59
http://s982.photobucket.com/albums/...%20HT%20breakdown/?action=view&current=32.jpg

 

[olow]

and still no pics but i bought 2 engins and one has 4000 miles on it aside from losing alittle compression and carb problems still runs

 

[bideronit13]

The reason I was asking for pictures is I thought you had a magic magneto.

 

[aaronwilde]

There is the photos. Help would be awesome on getting that magnet rotor part out. I can get that nut and lock washer that you see off easy enough, but then the magnet itself wont come off even when I pull with vice grips.