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Check for spark on a plug wire when it won't start. If no spark until it cools down, the ignition system is the problem. Could be the coil, the ignition control module (igniter), a crank sensor or pick-up coil, depending on your system, ...some of the most common things to check. If it just stalls, likely lost spark or gas to the engine cylinders. With a new pump, it probably lost spark.
Does it crank but not start ? Are you getting spark to the plugs ? Do you have fuel pressure to the injectors ? Did you check the computer for trouble codes ?
Is it getting gas properly? Has it been sitting around for a while? The carburators on motorcycles need to cleaned after sitting around. The jet could be full of varnish. Are you getting spark for sure? Pull out a spark plug and put it in the wire, crank it over and see if the spark plug sparks. When you pulled the plug was it wet at all with gas? Then it probably isn't getting gas right. Just some of the things you could try.
I had a similar issue with my '86....driving home, made a left turn, and engine shut down. Coasted to a stop, and had a look under the hood. Cranked over fine, had gas, spark, but no go! After a tow home, and more in-depth investigating, turned out that the timing belt had broken! The older engine has no interference between valves and pistons, so installing a new belt got 'er going again for about $40. You can look down though the oil fill port or loosen the upper screws on the belt cover to confirm that the valves are/are not moving when the engine cranks.
mr_haney2u
Have you checked for compression?
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