Clearances loose annoy the rider, clearances tight annoy the engine.
Not checking the clearances is false economy.
Out of spec valve clearance usually shows up as a loss of power and uneven running but as it happens gradually over time is goes unoticed. Unfortunately as tight clearance make no sound and it can go unoticed until it is to late due to burned out valves. Now it becomes an expensive fix and what could have been solved by changing a few shim now requires the head off , new valves, seats, seals, shims, head gasket and a lot of time amd money.
Not checking the clearances is false economy.
Out of spec valve clearance usually shows up as a loss of power and uneven running but as it happens gradually over time is goes unoticed. Unfortunately as tight clearance make no sound and it can go unoticed until it is to late due to burned out valves. Now it becomes an expensive fix and what could have been solved by changing a few shim now requires the head off , new valves, seats, seals, shims, head gasket and a lot of time amd money.