My bike hesitates before it's up to full operating temperature also. It will also hesitate if the engine is shut off for about 30 minutes and the restarted. I've installed the NGK Irridium plugs and have varied the gap setting from recommended, but there is no change. It's obvious that the cold start and warm up fuel mapping is incorrect. Although the bike runs fine when warmed up, the cold start hesitation is very annoying and a possible safety issue. My dealer's only response is to let the engine come to full operating temperature before ridding the bike.