You are right boobie it did not run or even try to crank I said that wrong.
So motor runnning pulled top plug wire shut it down
Motor running pulled bottom did not affect it. Checked spark with gap tester and spark looked the same and jumped the same gap.
Pulled the top wire and tried to crank with just bottom wire had to open throttle for it to run
But it will crank ok and idle with just top plug wire hooked up
Spark gap test the same top and bottom cylinder 7/16" gap with same color spark
do you think I could have just a dirty carb
You seem to have proved that it is not running on the bottom cylinder although running Ok on the top one
You now seem to have two equally good sparks. It is worrying though that at first you said you had no sparks on either cylinder and have cured that without really knowing why.
The fact that you have two good sparks indicates that the power pack and the coil assembly is OK. BUT there might be an intermittent fault that will return at some stage.
I think you have indicated that you have tried swapping the plugs over without it making any difference. If you have not try that and verify that it is still the bottom cylinder that is not working.
You seem to be suggesting in in post #16 that it will run with just the bottom plug hooked up if the throttle is opened .
A compression test would be the next logical step. Readings on the two cylinders should be within 10% of each other.
Also take a look around the carbs. Make sure both throttles plates open together. and that both are getting fuel.
If compressions are Ok,, you have 2 good sparks and nothing obviously wrong with the carbs externally then all thats left is to consider that the carbs, the bottom one anyway, may need cleaning