No Spark

[mrfreyguy]

I recently picked up a 78 Yamaha dt 175. Still debating on weather to put it on a kart or not. My problem is that I don't have any spark. PO said he thought it was the coil so I replaced that. Still no spark. What should I be looking for? As a FYI it has electronic ignition and it had been sitting for 5 years before I picked it up. Also does anyone know where I can find a wireing diagram?

mrfreyguy

 

[r_chez_08]

Have you replaced the plug?

 

[mrfreyguy]

I have not. I have tested other plugs on it though and still no spark. Should I be checking for faulty wires?

 

[r_chez_08]

A new correct plug would be the first thing to try.

 

[Kaptain Krunch]

after that there is a good chance its the CDI, they can get moisture in them and malfunction easily, especially on these older bikes. Check for bad wires first and get the right plug too.

 

[anderkart]

Here's a wiring diagram: http://www.slimduck.com/dt100_175_wiring.html

Try is disconnecting your kill switch and make sure its wire isn't pinched or something and grounding out to the frame somewhere.

 

[mrfreyguy]

Kaptian- I'll check all my wires once I get my hands on a multimeter. I'll also try to get the correct plug. If It comes down to me needing a new cdi dies anyone know where to get one cheep? The cheepest one I've seen on eBay went for $75 which is too much for me.

Ander- thanks for finding the diagram! Already tried dusconecting the kill switch wire. I'll look over the diagram to make sure all my wires are in the right place.