1998, 21K miles, tune up done at 14K, just before I got it three years ago. Riding today to and from work, started stalling every time I pulled and held the clutch for more than two or three seconds. Ran fine under load, no bogging or backfires. Add SeaFoam to every fifth tank or so, carbs have not been taken off and cleaned since I have owned it. Any thoughts on something else to check before I jump into a removal and cleaning of the carbs? Thanks in advance for any and all suggestions.

 

Air filter? Raise the idle?

 

Clean carbs, sync carbs, and double check the carb breather hoses...