Do you have a voltmeter or a timing light or anything? It would be easier to see if it's a coil that way, rather than buying another one and just guessing.

You should try to get a fuel filter in there, though.

Does it smell like gas when it's cold? When it's hot?

 

yes it does have a fuel filter and i made sure it was clean.... i do have a volt meter.... i pulled my spark plug wires out crtanked the bike and all four were getting spark... but some one was telling me when the motor gets hot then the coil could be going weak... or do you think its a short?