hard start after warm up

hello ladies and gents.

i have a '98 TE610 with no battery/E start (it's the kick start only), and i noticed my bike is NEARLY impossible to start after it's been warmed up. 1st 4-5 kicks starts up in the morning.. after idle for 5 minutes the engine dies.. after that, it's impossible to start. last time this happened it was the choke carb that had came loose, but i had it sealed and bolted back on. valve adjustment? cam chain?

any advice? thanks in advance.. i'm THISCLOSE from calling george from uptite, but i'd figure i'd ask you guys 1st..

thanks!

chris
los angeles, CA

It's usually valves need adjusting when conditions are as you described.