Service Manual

8-15
Table of Contents
Inspection
Twin Cylinder Engine Service Manual
February 2017 - Digital Edition
ENGINE INSPECTION AND RECONDITIONING
Lower End Inspection and Reconditioning (Cont.)
Crankcase (Cont.)
2. Recondition the cylinder bore:
- Hone cylinder bore to obtain crosshatch
- Clean bore after honing with hot soapy water
- Remeasure bore to specication in previous step (1c above).
3. Clean and remove all gasket material. Inspect all gasket surfaces for nicks and deep scratches.
4. Inspect the upper crankshaft bearing.
- Remove and discard the upper crankshaft oil seal.
- Inspect for surface wear, pitting and scratches.
- Measure and compare to specifications.
Crankshaft Hole Diameter
Standard (Height) 1.5751-1.5758 in. (40.009-40.025 mm)
Service Limit 1.5778 in. (40.075 mm)
5. Inspect the upper camshaft bearing.
- Inspect for surface wear, pitting and scratches.
- Measure and compare to specications.
- Inspect upper camshaft bearing.
Camshaft Hole Diameter
Standard (Height) 0.6299-0.6303 in. (16.0-16.018 mm)
Service Limit 0.6326 in. (16.068 mm)
6. Inspect and clean oil lubrication passage to upper crankcase bearing (Figure 14).
NOTE: Replace complete engine assembly if any issues are found with the crankcase assembly.
Figure 14