HAVE HAD HARLEY DAVIDSON SHOP CHECK OUT BIKE TWICE SAYS CLUTCH WORKS FINE, THEY ONLY RODE IT 3 MILES, RIGHT AFTER I PICKED IT UP FOR THE 2ND TIME SAME PROBLEM OUT OF TEN STOP AND STARTS, SLIPPED 7 TIMES NOT IMAGING THIS AND AM TAKING HAND COMPLETELY OFF, TO MAKE SURE THIS IS NOT ME, NOT TOTALLY DISENGAGING, ANY ONE HAVE ANY SUGGESTIONS? SLIPPING FROM 1ST TO 2ND