problem with #4 piston

[06wajess]

About a week ago I had my bike running decently... i felt all 4 headers right off the motor where the pistons are and they were hot which i figured was normal. now just today the 4th header coming off the 4th piston is a little cooler then the rest. any ideas?

[Buber]

That is a truly VAGUE description. Well, it appears that it doesn't fire like others do. Did you had a look at the spark plug?

[Volker_P]

Yes, first compare #4 with #1 spark plug. First whether it is same type and heat number and spark gap. If #4 is black or significantly darker than #1 this might be a hint to a compression or ignition problem. If it is brighter, it might be too lean which means a carb problem or bypass air. That's just coarse remote diagnostics of course.
If you did ride in rain just before you found out the difference, check your ignition cables and caps.

[06wajess]

the problem was the spark plug lol. I replaced it and it seems to be working now. it was just an easy fix my bad but thanks!

[Buber]

Hey, glad you fixed it, that's what counts
Although, next time, do try to give more precise description of the problem..