NO Spark=LONG Walk

[Frenfroe]

I just got back home after a long walk back to the truck and loading up a dead Penton ('76 GS175). It was running real well as I climbed out of the deep woods up a firebreak and turned on a logging road (I knew going to Sunday School this morning would pay off). When I got up to about 3rd it went to missing like a fouled plug and quickly died. No spark, new plug was no help, disconnecting the kill switch didn't help either.

I got it home and I checked the voltage coming off the blue and black wires from the motoplat and it pegged when I kicked it over with the voltmeter set on 10v/ac. Does this mean the motoplat is ok?

I cleaned the connections and cut back the plug lead and reinstalled the Sparky. Still no spark. Is the coil dead? It's a red lead one.

This is my ride for the ISDTRR. I need to get it running quick and get some more practice in! Any help and ideas appreciated. All I know about electricity is it will bite you, my test skills are limited!

Thanks, Frank



 

[Frenfroe]

Ok, after everything was checked and double-checked and the Motoplat was sprayed down w/WD40 and Brakeclean I had spark again. It fired up and ran a while, I cut it off, buckled the tank and seat on and rode around the yard a bit. It ran fine so I took off down the street a time or two, when it got good and warm it quit again. Sounds like somethings breaking down when hot, any ideas?

 

[Rocket]

From past experience, I would say the stator is bad.  If they start running bad when they get hot, that is a good indication the stator is the problem.
Rocket

 

[john durrill]

Frank,
 go to Yahoo and run a search for vinduro group. on it you can search the posts for one by Mark Anna, its a long post covering how to check a motoplat with a VOM. If the diode in your Motoplat is in the coil. you could have just lost the coil and not the stator.
Hope this will help,
John & Peter




Edited by - john durrill on 10/07/2002  1:39:24 PM

[fzrr750]

The coil is bad? Take it out and try another in it's place. The stator is bad? Go to
 www. vintagedirtbike.com. They rebuild stators (send yours to them) for about $176.00. At least you know you will have one in about a week to ten days.

 I hope this helps out.     Ed T.

71 Suzuki TM400,72 Suzuki TS400 Desert racer,76 Suzuki RM250,74 Yamaha MX360,79 KTM 250MX, 87 Yamaha FZRR750 X-endurance racer #112.

[Mark Annan]

Here is a link to my original posting.  Hope it helps.

http://groups.yahoo.com/group/vinduro/message/5676