Im having starting issues sometimes with my 06 katana 600... most sll thevtime it starts just fine, but recently ive tried to start it and it wouldnt start...would turn over but not start... then after waiting 15 minutes I tried again and it starts on the first try... then I might ride for a while and out of the blue it does it sgain, and just like the times b4 ater waiting 15 min it starts up just fine on the first try... does anyone know whats wrong?