Camshaft journal
Inspect the camshaft journal surfaces for scoring or evidence of insufficient lubrication.
![](https://motoinstruction.ru/img/honda/9/115829.jpg)
Inspect the camshaft journal surfaces for scoring or evidence of insufficient lubrication.
Measure the O.D. of each camshaft journal using a micrometer.
Service limits: A/B: 23.91 mm (0.941 in).
![](https://motoinstruction.ru/img/honda/9/115830.jpg)
Camshaft runout
Support both ends of the camshaft with V-blocks and check the camshaft runout with a dial indicator.
Service limit: 0.05 mm (0.002 in).
![](https://motoinstruction.ru/img/honda/9/115831.jpg)
Cam lobe height
Measure the height of each cam lobe using a micrometer.
Service limits:
- IN: 39.92 mm (1.572 in)
- EX: 39.40 mm (1.551 in)
![](https://motoinstruction.ru/img/honda/9/115832.jpg)
Decompressor cam
Inspect the decompressor cam surfaces for scoring or evidence of insufficient lubrication.
Check the decompressor cam for smooth operation.
![](https://motoinstruction.ru/img/honda/9/115833.jpg)
Camshaft oil clearance
Suspend the cam chain attaching wire through the spark plug sleeve hole and hook it.
![](https://motoinstruction.ru/img/honda/9/115834.jpg)
Clean off any oil from the journals of the camshaft holder, head and camshaft.
Put the camshaft onto the cylinder head and lay a strip of plastigauge lengthwise on top of each camshaft journal.
Do not hook the cam chain suspension wire against the head cover mating surface.
Apply engine oil to the threads and seating surfaces of the camshaft holder bolts.
Install the camshaft holder and tighten the bolts in a crisscross pattern in two or three steps.
Torque: 26 N·m (2.7 kgf·m, 20 lbf·ft).
![](https://motoinstruction.ru/img/honda/9/115835.jpg)
Do not rotate the camshaft during inspection.
Remove the camshaft holder and measure the width of each plastigauge at its widest point on the camshaft to determine the oil clearance.
Service limits: 0.12 mm (0.005 in).
![](https://motoinstruction.ru/img/honda/9/115836.jpg)
When the service limits are exceeded, replace the camshaft and recheck the oil clearance.
Replace the cylinder head and camshaft holder as a set if the clearance still exceeds the service limit.
Rocker arm, rocker arm shaft
Inspect the sliding surface of the rocker arms for wear or damage where they contact the camshaft, or for clogged oil holes.
Inspect the contact surface of the valve adjuster screw for wear or damage.
Measure the I.D. of each rocker arm.
Service limit: 14.05 mm (0.553 in).
![](https://motoinstruction.ru/img/honda/9/115837.jpg)
Measure the O.D. of each rocker arm shaft.
Service limit: 13.92 mm (0.548 in).
Inspect the shaft for wear or damage and calculate the shaft to rocker arm clearance.
Service limit: 0.14 mm (0.006 in).
Replace the rocker arm and/or shaft if necessary.
![](https://motoinstruction.ru/img/honda/9/115838.jpg)