Possible ignition module problem.
Same problem with my 91' Jimmy. I put it in the shop and it was the timing. Can be very cheap if you can do it out yourself, or put it in the shop and it will run you about $130-150 including labor.
seems that the timing is still incorrect. the distributor may be worn and causing this.problem may also be the points, a crack in the distributer cap,
no spark our timing belt snap our jumped timing
There's no way to set timing. Just align marks on camshaft and crankshaft during belt installation. There may be another problem if your car is still running rough.
check the spark plugs make sure you have spark and/or your timing is off
This could be a problem with timing or you need to check the leads to the coil packs are on firmly.
your timing can not be right
check the ignition timing
your plugs may be fouled. pull them and check for carbon buid-up, discoloration, etc. you may be able to clean them and adjust the gap. also, very much sounds like a timing problem. the timing could be off just enough to permit the bike to start but will not accept throttle, idles rough, & small back-fires through the carbs. hope this helps
you should take it to a car tech or some one that knows how to set the timing if that does not work you should have your timing belt replaced.
Depending on mileage perhaps timing chain is sloppy
Have the timing checked. Actually, do yourself a favor and have a full diagnostic done.