I was told that if I feel no power loss and its not hard to start they are ok. What do you guys think I have the ability to check them myself but why waste my time with no symptoms, noises or power loss.
that is bad advice
if you wait till there's a power loss, it's too late, once there's a power loss or straing issues, the valves are going to be more than out of adjustment, the seats will be burnt , you will need what is known as a valve job, cut new seats, lap the valves, probably new valves, cause it's likely the stems will be burnt & weakened as well, if you just try adjusting and not doing the valve job, on a few thousand miles, the piston will develop a hunger for the head of that valve, because once the seats are burnt, even in perfect adjustment hot gasses will leak thru when they are not supose too, and further burn the stem, weakening it till it snaps
it doesn't take long to do serious damage once you have a leaky valve seat
SV's are noisey engines theres a lot of moving parts, cam chain slap, injectors clicking, valves recipricating, and not any excess engine wall or crankase mass to absorb sound energy, nekid, not enclosed in plastic , I4s are quieter cause they have smaller parts and are more balanced than twins