Have you changed jets, spacer or done the mixture screw mod?  How many turn out is it right now?

Just took the bike out today and it ran fine until it got warm and then when i came to a light it died on me. I turned up the throttle and got it home but the fluctuating RPMs (the stutter) was still there and a little worse.

I am pretty Sure I need to change the spark plug again as it is probably fouled again but I could really use some help on this.

THANKS ALOT for everyones help

I am wondering if bad gas might be the problem. Did you try draining it out and putting some fresh gas in? Just a thought. Otherwise I would check compression, and check for air leaks around the carb. Is it sealing tight on the boot? Do you have a pinched vacuum or carb vent hose, maybe?

Something nobody has mentioned...  Did the weather warm up significantly or turn very rainy or humid right about the time your troubles began?  My mix is veeeeery weather dependent.  When the hot weather hits, I'm always fiddling with the adjustment screw.  Cool mornings and hot afternoons make for a lot of changes.