Camshaft holder assembly
![](https://motoinstruction.ru/img/honda/9/115879.jpg)
Clean the oil passages before assembling the cylinder head and camshaft holder.
Lubricate each rocker arm shaft outer sliding surfaces with molybdenum oil solution.
The intake rocker arm shaft is longer than the exhaust rocker arm shaft.
![](https://motoinstruction.ru/img/honda/9/115880.jpg)
Install the intake rocker arm and rocker arm shaft to the camshaft holder.
Install the exhaust rocker arm and rocker arm shaft to the camshaft holder.
Align the grooves in the rocker arms with the bolt holes on the camshaft holder by turning the rocker arm shafts.
![](https://motoinstruction.ru/img/honda/9/115895.jpg)
Camshaft installation
If both front and rear camshafts were removed, start camshaft installation with the front cylinder as described below.
Even if you are servicing either the front or rear cylinder head, the other cylinder head cover must be removed and the other camshaft position must be checked.
Lubricate the camshaft journal surfaces of the cylinder head with molybdenum oil solution.
![](https://motoinstruction.ru/img/honda/9/115896.jpg)
If the cam sprockets are removed, install them onto the camshaft.
Install the cam sprocket bolts.
![](https://motoinstruction.ru/img/honda/9/115881.jpg)
The camshafts has the following identification marks:
- "F": Front cylinder camshaft
- "R": Rear cylinder camshaft
![](https://motoinstruction.ru/img/honda/9/115882.jpg)
Front cylinder
If the rear cylinder camshaft has not been serviced, remove the rear cylinder head cover and check the rear cylinder camshaft position as follows:
Turn the crankshaft clockwise and align the "RT" mark on the primary drive gear with the index mark on the right crankcase cover.
![](https://motoinstruction.ru/img/honda/9/115883.jpg)
If the rear cylinder camshaft has not been serviced, begin here.
Check the index lines on the rear cylinder camshaft as shown.
![](https://motoinstruction.ru/img/honda/9/115884.jpg)
If the index lines on the rear cylinder camshaft do not align with the rear cylinder mating surface, turn the crankshaft clockwise 1 turn (360°) and align the "RT" mark with the index mark.
Check the index lines on the rear cylinder camshaft as shown.
Turn the crankshaft clockwise 16/45 of a turn (128°) and align the "FT" mark with the index mark.
![](https://motoinstruction.ru/img/honda/9/115885.jpg)
If the rear cylinder camshaft has been serviced, begin installation of the front cylinder camshaft here.
Apply molybdnem oil solution to the camshaft journals and cam lobes.
![](https://motoinstruction.ru/img/honda/9/115886.jpg)
Install the cam sprocket onto the cam chain with the index mark facing upright and align the index lines with the upper surface of the cylinder head.
![](https://motoinstruction.ru/img/honda/9/115887.jpg)
Install the dowel pins.
![](https://motoinstruction.ru/img/honda/9/115888.jpg)
Install the camshaft holder assembly.
![](https://motoinstruction.ru/img/honda/9/115889.jpg)
Apply oil to the camshaft holder bolt threads and flange surface.
Install and tighten the camshaft holder bolts to the specified torque.
Torque: 26 N·m (2.7 kgf·m, 20 lbf·ft).
If the cam sprockets are removed, tighten the cam sprocket bolt to the specified torque.
Torque: 23 N·m (2.3 kgf·m, 17 lbf·ft).
Turn the crankshaft one revolution and tighten the other side cam sprocket bolt to the specified torque.
Apply engine oil to the spark plug sleeve threads and О-ring grooves.
Install the new О-rings into the spark plug sleeve grooves.
![](https://motoinstruction.ru/img/honda/9/115890.jpg)
Install and tighten the spark plug sleeve to the specified torque.
Tool: Holder attachment 07930-KA50100.
Torque: 18 N·m (1.8 kgf·m, 13 lbf·ft).
![](https://motoinstruction.ru/img/honda/9/115891.jpg)
Rear cylinder
Turn the crankshaft clockwise and align the "FT" mark on the primary drive gear with the index mark on the right crankcase cover.
- If the "F" mark on the front camshaft flange faces up, turn the crankshaft clockwise 29/45 of a turn (232°) and align the "RT" mark with the index mark.
- If the "F" mark on the front camshaft flange faces down (cannot be seen), turn the crankshaft clockwise 1-29/45 turns (592°) and align the "RT" mark with the index mark.
![](https://motoinstruction.ru/img/honda/9/115892.jpg)
The remainder of the rear cylinder camshaft installation is the same as the procedures described on page 8-22 except the mark on the camshaft flange that should face up should be an "R".
![](https://motoinstruction.ru/img/honda/9/115893.jpg)
Remove the 2 mm pin holding cam chain tensioner wedge A on both tensioners.
![](https://motoinstruction.ru/img/honda/9/115894.jpg)