Have any of you ever felt a skip in power delivery? I took the bike up a mountain and comming out of a curve I rolled the throttle and I felt.... like a miss or a studder ???. It was very brief then it grabbed in again. I was thinking clutch and I don't know how long they last. I'm not hard on the bike but, I'm not baby'in it either. My bike has over 27,000 mi. Any info will be appriciated.