Author Topic: GTMX80 Electrical question  (Read 2404 times)

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Offline 211

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GTMX80 Electrical question
« on: December 27, 2014, 10:25:22 am »
Have 1978 GTMX80, motor runs, starts first kick but will not run past 1/3rd throttle without the motor feeling like the main seals have blown; wont rev out. Rebuilt the motor, new bearings and seals but now suspect it is electrical.
any clues?
Not sure if its the stator, condenser but they are the next suspects......
211

Offline sleepy

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Re: GTMX80 Electrical question
« Reply #1 on: December 27, 2014, 11:47:07 am »
Good chance it's the condenser.

Offline pokey

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Re: GTMX80 Electrical question
« Reply #2 on: December 27, 2014, 08:07:18 pm »
Condensors will show as arcing across the points, could be that and they are cheep.. have you cleaned the pipe?

Offline 80-85 husky

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Re: GTMX80 Electrical question
« Reply #3 on: December 27, 2014, 08:37:22 pm »
wasp nest in the exhaust?

Offline FireKwaka

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Re: GTMX80 Electrical question
« Reply #4 on: December 28, 2014, 08:23:04 am »
I got sick of the unreliable condensers and adapted a lawn mower electronic ignition to my GTMX80, took a bit of fiddling and scratching my head on how the hell they work. All good and as reliable as the victor :)
83 KX500, 83 RM250D, Can Am MX2.

Offline 211

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Re: GTMX80 Electrical question
« Reply #5 on: December 28, 2014, 12:43:41 pm »
flipped out condenser no better has a flame thrower for a spark, tweaked the carb and got it considerably better (extra half turn on the air screw)but still not 100% and it may be that the pipe is the problem as well, will take a look at it - blue stuff comes out the back that's as far as the investigation has got!

Offline 80-85 husky

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Re: GTMX80 Electrical question
« Reply #6 on: December 30, 2014, 12:23:21 pm »
does the blue stuff come out faster as the revs rise?

Offline evo550

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Re: GTMX80 Electrical question
« Reply #7 on: December 30, 2014, 01:07:33 pm »
Carbon build up in exhaust?

Offline 211

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Re: GTMX80 Electrical question
« Reply #8 on: January 11, 2015, 10:54:55 pm »
Carbon build up in exhaust?
Yep - sometimes the really simple things are the hardest to see  ::)