Depends on the Cubic Feet per Minute of Air the unit moves. But typically 6 inches is good.
In short you should never place anything that will block any air flow to the a/c system........
the clearance of intake valve as far as i know is .18 in.
the standard valve clearance for kawasaki barako is 0.08mm for intake and 0.10 for exhaust
The clearance it is .0002 for the intake and .0003 for the exhaust.
What is valve clearance of 4hg1
Follow the black air intake hose mounted on top of the left side of the radiator frame leading to the engine. It leads you to the air filter canister.
the valve clearance should be set at .002 for the intake and the exhaust
The exhaust valves should have .005 inches of clearance, and the intake valves should have .004 inches of clearance.
the valve clearance is 0.002" on both intake and exhaust.
valve clearance; Intake= 0.25mm (0.010in) Exhaust=0.30mm (0.012in)
0.14mm intake and exhaust
Intake clearance COLD: 0.006-0.010 in. (0.15-0.25mm), Exhaust clearance COLD: 0.008-0.012 in. (0.20-0.30mm), Intake clearance HOT: 0.008-0.012 in. (0.20-0.30mm), Exhaust clearance HOT: 0.010-0.014 in. (0.26-0.36mm).