Assembling The Crankcases; Engine Specifications - Honda CB350 Repair Manual

88 ENGINE AND TRANSMISSION
Mark (2) on tensioner push bar (1) must face up—
ward (360)
ASSEMBLING THE CRANKCASES
1. The crankcase mating surface must
be clean and free of any scratches. Minor
repairs can be made with an oilstone.
2. Apply a thin coat of sealing com—
pound to the crankcase mating surface.
Be careful not to get any of the sealer on
the bearings or inside surface of the
crankcase.
3. Install the lower case. Make sure
that the cases mate properly before in—
stalling the crankcase bolts. If they do
not, check that all of the bearing locating
pins are in place.
4. Install the crankcase bolts and
tighten them evenly and gradually in an
"X" pattern, starting from the inside and
working out.
5. Install the crankcase cover compo—
nents and the top end as described pre—
viously.
Engine Specifications
Item Standard (mm/in.)
Service Limit (mm/in.)
Camshaft side clearance
0.2—0.6/0.008—0.024 1.0/0.04
Camshaft lobe diameter
36.858—36.898/1.451—1.453
36.68/1.444
Camshaft journal diameter 21.939—21.960/0.864—0.865
21.92/0.863
Camshaft bearing ID
22.00—22.021/0.866—0.867 20.05/0.868
Rocker arm shaft diameter
12.950—12.986/0.510—0.511
12.90/0.508
Max head warpage ———
0.05/0.002
Valve seat width 1.0—1.3/0.040—0.051
2.0/0.08
Valve—to—valve guide clearance
Intake
0.01—0.035/0.0004—0.0014
0.08/0.0031
Exhaust
0.03—0.055/0.0012—0.0022 0.09/0.0035
Valve stem diameter
Intake 6.975—6.990/0.2746—0.2752 6.955/0.2738
Exhaust 6.955—6.970/0.2738—0.2744 6.935/0.2730
Valve spring free—length
Outer spring
49.0/1.929
47.8/1.882
Inner spring
39.8/1.567
39.3/1.547