My bike rode fine one day next day wont start dont think its getting spark any ideas

SOURCE: 2004 Yamaha V-star 650, wont start.

change the coil you may not think it got hot but sometimes a coil can overheat on the inside just enough to break the copper winding. when riding hard slow down for a couple of miles to give everything time to get back to normal temps before shutting it off

SOURCE: honda cbr 400 rr starting problem

i could not find a schematic of a 96 cbr400rr, so guessing this bike is not from the USA. however, there should be a master fuse near the battery on the positive side mounted to the battery box somewhere. i would check this fuse first to see if its burned out.

also, is battery fully charged? might have to top charge the battery to get good juice if its old (>3 years) and been sitting for a bit.

good luck.

SOURCE: engine misfire and cutting out when running at normal engine temp

Make sure your fuel tank vent is not plugged. To see if this is the problem, the next time the bike starts acting up, stop and open the fuel tank. If you hear a whoosh of air being sucked in you know your vent is plugged.

The C8HA is still available, it is NGK stock number 2168.
Good luck.

SOURCE: my dirt bike will not start i think its an electrical probel

Since the engine starts briefly I doubt if the electrics are the problem. Got gas? Got a bit of water in the gas tank / carburetor bowl / fuel petcock bowl?

SOURCE: bike cranks and wont start

replace stator for sure.