E-TON Beamer User Manual download pdf (Page 36)

6. CYLINDER / PISTON

6.1 SERVICE INFORMATION

GENERAL

Camshaft lubrication oil is fed to the cylinder head through an oil orifice in the cylinder head and engine

case. Before installing the cylinder head, make sure the orifice is not clogged and the gasket, O-ring, and

dowel pins are in place.

ITEM STANDARD SERVICE LIMIT

Cylinde

I.D. 57.400 - 57.410 57.50

TAPER 0.10

OUT OF ROUND 0.10

WARPAGE ACROSS TOP 0.10

Piston

Piston pin

Piston rings

PISTON O.D. 57.3075 - 57.3095 56.500

PISTON PIN BORE 15.002 - 15.008 15.04

PISTON PIN O.D. 14.994 – 15.000 14.960

PISTON-TO-PIN CLEARANCE 0.002 – 0.014 0.02

PISTON-TO-PIN CLEARANCE TOP 0.015 – 0.050 0.12

PISTON RING-TO-RING GROOVE

CLEARANCE

SECOND 0.015 – 0.050 0.12

TOP/SEC 0.10 – 0.25 0.5

PISTON RING END GAP OIL 0.2 –0.7

CYLINDER-TO-PISTON CLEARANCE 0.0005 – 0.1025 0.1

CONNECTING ROD SMALL END I.D. 15.010 – 15.028 15.06

6.2 TROUBLESHOOTING

Low or unstable compression

 Worn cylinder or piston rings

Overheating

 Excessive carbon build-up on piston or combustion chamber wall

Knocking or abnormal noise

 Worn piston and cylinder

 Excessive carbon build-up

Excessive smoke

 Worn cylinder, piston, or piston rings

 Improper installation of piston rings

 Scored or scratched piston or cylinder wall

 Damaged valve stem seal

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E-TON Beamer User Manual Page 36