Post by lain on Aug 12, 2015 20:35:18 GMT -5
So I have been trying to figure this out all day now. I got this moped for free and all the wires were disconnected and the carb was... well let's just say I now know what 20 year old solid gas looks like... and how 3 cans of carb cleaner is what it takes... Everything is all cleaned out, everything hooked up properly.
I can tell the issue is no spark because when I read the end of the spark plug boot I get 0v!!! I trace down the line and find the power reaches the thyristor and then does not go to the ignition coil. The problem seems to be the thyristor but I am unsure as I have never worked on a 2 stroke before, and never worked on anything made before 2012 before today.
I also checked the other wires from the alternator. The green wire came up with around 30v, the blue came up with around 35v, the red came up with around 45, the white nothing, the yellow nothing. All reading taken on the 50v AC setting with an analog multimeter with a needle so very hard to get accurate readings while pumping a moped.
I am guessing if the yellow is the pickup it would read something, but since it would read 0.2v according to the manual I think my meter just doesn't read it. I also checked the yellow wire with the ohmz reading while pumping it never dropped from infinity which I think means it never produces any current, is this correct? If that is correct then I would think the culprit is the pickup aka the yellow wire?
I also checked all the wires on the thyristor. Power goes to the thyristor via red wire from alternator at about 45v, the yellow wire goes from the alternator to the thyristor, and if it is working properly should read 0.2v but i cannot read that small so I couldnt get a reading off of it like above. The white and blue wires read 0v. As far as I can tell the blue wire should be the wire responsible for sending the power to the ignition coil.
Anyone have any ideas?
Sources for the info I have gathered:
jawamoped.com/210WorkshopManual.pdf
www.mopedarmy.com/wiki/Jawa_Thyristor
I can tell the issue is no spark because when I read the end of the spark plug boot I get 0v!!! I trace down the line and find the power reaches the thyristor and then does not go to the ignition coil. The problem seems to be the thyristor but I am unsure as I have never worked on a 2 stroke before, and never worked on anything made before 2012 before today.
I also checked the other wires from the alternator. The green wire came up with around 30v, the blue came up with around 35v, the red came up with around 45, the white nothing, the yellow nothing. All reading taken on the 50v AC setting with an analog multimeter with a needle so very hard to get accurate readings while pumping a moped.
I am guessing if the yellow is the pickup it would read something, but since it would read 0.2v according to the manual I think my meter just doesn't read it. I also checked the yellow wire with the ohmz reading while pumping it never dropped from infinity which I think means it never produces any current, is this correct? If that is correct then I would think the culprit is the pickup aka the yellow wire?
I also checked all the wires on the thyristor. Power goes to the thyristor via red wire from alternator at about 45v, the yellow wire goes from the alternator to the thyristor, and if it is working properly should read 0.2v but i cannot read that small so I couldnt get a reading off of it like above. The white and blue wires read 0v. As far as I can tell the blue wire should be the wire responsible for sending the power to the ignition coil.
Anyone have any ideas?
Sources for the info I have gathered:
jawamoped.com/210WorkshopManual.pdf
www.mopedarmy.com/wiki/Jawa_Thyristor
