2003 BONNEVILLE AMERICA 13K MILES. SAT 8 YEARS. GOT RUNNING NICELY,B UT ARE THE TRIUMPH ENGINES TYPICALLY LOUDER THEN OTHER MOTORCYCLES., HEAR TAPPING AND SO ON. VALVE ADJUSTMENT ? AND IF SO HOW INVOLVED IS IT. NOTE:HAVE ADDED 1 QWUART OF OIL BUT HAVE NOT CHANGED WITH FILTER YETS.