Hi, I have just bought a CBR 600 F 1997 with a beowulf exhaust with 39,870 miles on the clock. Can anyone tell me when I should check cam chain tensioners servicing etc. I have had 20-30 other bikes from Scramblers - fireblades (street Fighter) Just wanting a few tips and hints in regard to CBR 600 because it seems like a neat little bike and I would like to keep it that way. :)