Hi guys, quick question for anyone who may answer, i was flat out on my bike2011 s1k last summer, but the clock only read 179mph, she wouldnt go anymore, but my mate was with me on his 2014 s1k and his clock read 186mph, any one know why this woulld be? ive had my bike up to same before, i did change chain/sprockets and the front arrived with an extra tooth (17) and rear was same but im told this shouldnt affect the clock????