Sorry if this is very longwinded.
Have had my 73 Eldorado for about 2 months now, but for half that time the temperature was too low for me to get out to the garage much.
Bike was running, but a bit rough. Took carbs apart and cleaned everything.
No real difference. It would idle with choke on, but not too happy otherwise.
Then I thought it was running on just the left cylinder.
Bought a Carbtune, but the reading from the right cylinder was bouncing all over the place.
Thought it might be an ignition problem, but seemed to be getting a spark at both cylinders.
Anyway, this week I changed the coil.
Kept reading that the coil should have resistance of 3 ohms, and mine was about 1.6 ohms.
No Bosch blue coils available here at the moment, so went with a Viper coil.
While I had the tank off I installed a front brake switch lead from Gregory Bender, and also a new headlight/turn signal switch that he had made up for me.
New coil on, everything back together and bike refuses to start.
Turns over fine, but no starting.
Both plugs are getting a spark.
Checked coil and the resistance between the two terminals is 1.6 ohms !
Went back to check old Bosch coil sitting on the bench and it is 3.2 ohms !
Pull tank off again and put the oil coil back on.
Bike still won’t start.
Checked coil resistance and it’s 1.6.
But, unplug the two leads and check it again - 3.2 ohms.
Is this normal ? Or have a a short somewhere.
Apart from the coil, all I have changed is the headlight switch. New wiring for the switch, but it is just a straight replacement for the old switch wiring.
Checking the primary winding resistance on the Bosch coil while unplugged is 3.2 ohms, while secondary winding is 8,300.
The Viper coil is supposed to be 3 ohms, but the numbers are 2.7 ohms, and 20,000 on the secondary winding.
Thanks for any info.