Operating instructions

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100

Table Of Contents

MARCH 1982 6-19

TABLE XII

TABLE OF LIMITS

New PartsRef.

No.

Chart

No.

Model Description Serviceable

Limit

Min. Max.

All

CYLINDERS

Cylinder bore (lower end of barrel) ........................ Diameter:

Cylinder bore choke (at 5.75" from

open end of barrel). .............................................. Taper:

Cylinder bore out-of-round ...................................................:

Cylinder bore. ........................................ Allowable Oversize:

Cylinder bore surface roughness. ................................RMS:

Cylinder barrel in crankcase. ................................. Diameter:

Intake valve seat insert in cylinder head. .............. Diameter:

Intake valve guide in cylinder head. ...................... Diameter:

Exhaust valve guide in cylinder head. ................... Diameter:

Exhaust valve seat insert in cylinder head. ........... Diameter:

Intake valve seat ........................................................ Width:

Exhaust valve seat ..................................................... Width:

Exhaust valve seat to valve guide axis. ...................... Angle:

Intake valve seat to valve guide axis .......................... Angle:

ROCKER ARMS AND SHAFT

Rocker shaft in cylinder head bosses. ................... Diameter:

Rocker shaft in rocker arm bearing. ...................... Diameter:

Rocker arm bearing in rocker arm.......................... Diameter:

Rocker arm .................................................. Side Clearance:

Intake valve in guide. ............................................. Diameter:

Exhaust valve in guide .......................................... Diameter:

Intake valve face (to stem axis) .................................. Angle:

Exhaust valve face (to stem ax is). ............................. Angle:

Intake valve (max. tip regrind .015) ...........................Length:

Exhaust valve (max. tip regrind .015). .......................Length:

Intake and exhaust valve (full indicator

reading) ......................................................Concentricity:

Valve rocker toe to valve stem (dry lifter) .............................:

Deleted

Piston (below 3rd ring groove) in cylinder. ............ Diameter:

Deleted

Top piston ring in groove. ............................ Side Clearance:

Second piston ring in groove. ...................... Side Clearance:

Third piston ring in groove. .......................... Side Clearance:

Fourth piston ring in groove. ....................... Side Clearance:

Top ring gap (in cylinder barrel) ....................................Gap:

Second ring gap (in cylinder barrel) ..............................Gap:

Third ring gap (in cylinder barrel) ..................................Gap:

Fourth ring gap (in cylinder barrel) ................................Gap:

Top and Second ring (standard gap). ................... Tension*:

Fourth ring (standard gap). ................................... Tension*:

Piston pin in piston (standard or 0.005 oversize) ... Diameter:

Deleted

Piston pin in cylinder. ...................................End Clearance:

Piston pin in connecting rod bushing. .................... Diameter:

5.256

0.003

5.266

5.271

0.003 L

0.004 L

0.035 L

0.005 L

0.006 L

4.789

4.791

0.004

0.027 L

0.008 L

0.0075L

0.012 L

0.059

12 Ibs.

8 Ibs.

0.0015L

0.090 L

0.0040 L

5.251

0.001

0.000

5.261

5.266

0.004 L

0.009 T

0.0010T

0.0070T

0.017

0.120

45° 00'

59° 30'

0.0000

0.0010L

0.0020T

0.002 L

0.0012L

0.0030 L

59° 45'

45° 00'

4.804

4.806

0.000

0.060

0.010 L

0.004 L

0.0035 L

0.0060L

0.033

0.030

0.021

0.033

13 Ibs.

9 Ibs.

0.0001 L

0.036 L

0.0022 L

5.253

0.003

0.002

5.263

5.268

0.010 L

0.012 T

0.0025T

0.0100T

0.156

0.171

45° 30'

60° 00'

0.0020L

0.0025 L

0.0040T

0.015 L

0.0027 L

0.0045L

60° 15'

45° 30'

4.824

4.826

0.002

0.200

0.013 L

0.006 L

0.0055 L

0.0080L

0.044

0.046

0.032

0.049

17 Ibs.

13 Ibs.

0.0007 L

0.048 L

0.0026L

* Measure piston ring tension on diameter perpendicular to gap when ring is compressed to specified inch gap.