Valve noise increasing
I just purchased a '87 R80 with about 100K miles on it. The bike is in excellent shape with the exception of a broken odometer and a noise in the right side jug.
When I purchased the bike the owner told me, 'there is a loud ticking sound in the right side jug that has been getting worse', and he thinks he's noticed less power. He has adjusted the valve clearances regularly and thinks the problem is that it may need new valves.
Riding the bike it seem's fine. However, since the previous owner know's the bike I'm figuring I'd better check this thing out.
What are your opinions on this, please? At 100K miles what preventative maintenance might I want to look into? Thank you.