Originally Posted by WIsixfitty
simple question (I think).
What is the valve check interval?
I checked the lc4/690 index but nothing jumped out at me.
6K miles. Every time my intakes were tight, When I got about 18K miles on the bike they were always out of spec tight. The 690's definitely a bike you don't want to go past the interval without checking. It's simple to do and cheap to shim when needed.