Last night I finished installing my Leo Vinci Slip On(Nice Pipe Btw) and for some reason when I tried starting it.. it started up then died. Then I tried again and it was cranking but nothing. Third time I twisted the throttle and it cranked right up. I then rode around for about an hour and turned it off and started it and it started up like normal. Just wondering if this is normal after installing a slip on? If not what could of caused this?