Cheers Phil.......I just wondered if there was more resistance in one direction than the other...... I'll sort this d*mn bike out if it kills me...... AL.
OK...a bit further on......both pick-ups seem to test OK at 96+ Ohms (I guess they are OEM....but even so, I have now seen two figures for the OEM pick-ups in the versions of the 750/900 workshop manuals...........100 and 220). Anyone happen to know what readings for resistance I should get on the coils primary and secondary windings?...The workshop manual seems a bit wrong with the secondary winding at 3700 Ohms....... AL.
Al The specification of the secondary winding resistance is between 10,800 ohms - 16,200 ohms, and the primary: 3.8 -5.2 ohms ( from my Haynes manual) What sort of meter are you using digital or analogue? what range is the meter set to for reading for the secondary coils?
Using a digital one.......tested six coils....all primarys are approx 4.5 - 5 Ohms. Secondarys are 13,000 on the oldest pair and on the newer ones 15,000+ (the ones on the bike are 15.5 approx)..... Setting the meter @ 20K for the coils and 200 for the pick-ups. Cheers....AL.
All within spec' then Al, that's a relief! One less thing to worry about, you can sleep soundly tonight!
Hi Al, From a past headache check the ohms while heating the pickup coil up in hot water. I had a fault on my old dd race bike and it would only drop onto one cylinder when hot. I found what was wrong with it out of interest after i fitted 2 new pickups.
I don't think I have a coil problem, bearing in mind I have tested six of them all with similar readings......... ........and the running problem occurs as soon as the bike is started, so they really don't get much of a chance to get warm (that includes substituting coils and and the CDI boxes) I'm fairly certain it isn't 'electrics' as such......unless the flywheel is a bit loose, but I reckon that would affect both cylinders if it was. I'll have a look at that when I have got the carbs back on and tried running it again. AL.
