Ignition coil resistance.

Black Panther/Street Moto, Baghira, Enduro, Mastiff, Skorpion Traveller and Tour.

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Ignition coil resistance.

Postby Dave-the-rave » Fri May 15, 2015 10:58 am

Hi guys. Lost me spark on a Skorpion Sport @ 50 000 miles. Well it's intermittent and weak enough to be regarded lost. I've got power to the coil but unsure of the resistance readings.

I have 18.9 Ohms primary and 19000 secondary. Does that mean it's knackered?
Also does anyone know the serial number of the coil? All I know is its a Denso.

Thanks in advance.
His - 1995 Yamaha XV750, 21 000 miles.
Hers - 1994 MZ Scorpion Sport - 40 000 miles.
Dave-the-rave
 
Posts: 31
Joined: Thu Mar 20, 2014 12:42 pm
Location: London

Re: Ignition coil resistance.

Postby Dave-the-rave » Thu May 21, 2015 11:37 am

From the XTZ660 manual...

Primary resistance 3.4 - 4.6 Ohms at 20 degrees C
Secondary resistance 10.4K - 15.6K Ohms at 20 degrees C

Plug cap 10K Ohms at 20 degrees C. Presumably that's with a functioning 5 Ohm resistor installed.
Seems both the SZR660 and XTZ660 use the same coil as the MZ660's. The SZR660 plug cap fits but I haven't confirmed that of the XTZ.
His - 1995 Yamaha XV750, 21 000 miles.
Hers - 1994 MZ Scorpion Sport - 40 000 miles.
Dave-the-rave
 
Posts: 31
Joined: Thu Mar 20, 2014 12:42 pm
Location: London


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