I have a 2002 GL 1800 Champion Trike. Last year everything was great. I took the trike out this year for the first ride and the rear suspension is making a squeaking rubber rubbing noise. I have looked under trike and cannot see anything loose or broken. It doesn't make this noise when cornering but just when going over bumps . Any suggestions as to what might be causing this noise ?<img src="images/smilies/confused.gif" border="0" alt="" title="huh??" class="inlineimg" />