Hey all im new to the forum, n new to road bikes. i just got my learners and im lookin for a bike, i have my eye on a FZR250 90' model with 50k kz on the clock. I went to see it lastnight, the bike looked good n started straight away. but at idle the bike made a sound (*excuse my lack or motor cycle knowledge) that sounded like noisy tappits like on a car, the sound was coming from the top of the motor *i think* could it be a timing chain tensioner? or worn lifters. if so. are they easily replaced t any ideas would be greatly appreciated sorry for the rant. cheers.