82 850 ignition issues.

[stoy75]

Ok. As sitting on bike left coil at connector 4.5ohms and spark plug leads 11.6 kohms. Right coil at connector 4.5 ohms and spark plug leads 12.51 kohms. This was taken cold. Will get voltages and warm impedence in the morning.

[stoy75]

Alright further and more complete testing. Impedence stayed basically the.same on a readings hot. Voltage at coils 9.8 compared to battery of 11.8 while running. Re synched carbs and found #3 pilot screw makes no change. Took it apart to find I put it together wrong with spring below o ring and spacer. Oring was subsequently torn to shreds. Thinking this is my problem and with that carb being wrong and being #3 my psynch was bonked anyway. Guess ill have to order a whole new kit to get that one o ring. But until I do this is my suspect and there is no way to test further. Will be doing coil relay mod as well since ill have plenty of down time. Sound like this could be it?

[mike_of_bbg]

11.8V while running seems quite low. Have you gone through the stator tests? You definitely have too much drop in voltage at the coils. Cleaning all electrical connections sounds like a good thing to do; go ahead and do the coil relay mod too. The idle screw could be a problem but doesn't really explain the bogging on the highway to me... Bad gas cap vent maybe?

[stoy75]

I had been beating on the battery pretty bad starting and shutting down tuning the carbs.

[Redman]

...... Voltage at coils 9.8 compared to battery of 11.8 while running. ......?

11.8v at battery when running NOT GOOD.
Did you check that at mid rpms, say 4000 or 4500?
Need to do complete check of charging system.

Also put on battery charger, see if it charges up to good voltage then, lie just over 12.

THen when running at mid rpms your bikes charging system should have battery voltage at somethinbg like 13.5 or 14.0 (depending if stock R/R or more recent aftermarket).

Ignition system may work, but not work well at less than 10 volts.
Maybe the ignition system is okay, just cant work well at less than 10 volts. ANd the problem is your charging system.

.

[mike_of_bbg]

Be that as it may, the battery voltage you read when the bike is running is actually the output from the charging system. If it were me I'd charge the battery (no more than 2A charging current), clean all connections, and run through the stator tests.

The general opinion seems to be that a 1V drop from battery to coils is about the maximum acceptable.

I had been beating on the battery pretty bad starting and shutting down tuning the carbs.

[stoy75]

Just retested. 12.68 at battery. Must have not had good contact. 9.8 at coils idle. 13.46 at battery 10.2 at coils at 4000 rpm.

[stoy75]

Also checked paperwork from prior owner. New stator and r/r in 2011.

[stoy75]

Ok so reviving a dinosaur here but spent some time on the bike over the winter. Valves adjusted which were WAY out of spec. As in two shim sizes too tight. But I'm lost now. Went through and rebalanced carbs and my issue got more confusing. Before if I removed the plug wire off of #3 while the bike was running there was minimal rpm change. All others bogged down the bike. Now after valve clearance asjustment, coil relay mod, and rebalance I can now remove #2 or #3 with minimal rpm change. But pulling #1 or #4 kills the bike.

[stoy75]

And just when it wasn't quite strange enough I fire up the bike today and all but #2 are firing