-you wouldn't be the first person to take notice of a loud clunk
when changing gears; particularly into 2nd; as for the vibration,
where are you feeling it - the handlebars or footpgegs and
finally, as for the waranty, it would depend on when your
bike went into service; - if you're the original owner, then add
3 years to the month/date you bought the bike; if you're not the
original owner, then contact your local dealer with the vin # and
they should be able to tell you when the warranty is over;
- the mileage is not an issue - 3 years unlimited mileage
...Ken