MY BROTHER HAD A LOW SPEED (UNDER 20 MPH) CRASH ON A 2003 HARLEY HERITAGE SOFTAIL. UPON HITTING THE GROUND, THE BIKE BURST INTO FLAMES. THIS IS VERY UNUSUAL AS THE SPEED WAS LOW, THE IMPACT WAS NOT SEVERE (MY BROTHER ENDED UP WITH A SEVERELY SPRAINED ANKLE), BUT THE BIKE WAS TOTALED. I BELIEVE THERE IS CAUSE FOR CONCERN. THE BIKE IS A FUEL INJECTED TWIN CAM 88 ENGINE. *LA