Specifications

VALVES

Fit in guide (IN) 1979 and earlier 0018 - .0038 in.

1980 and later .0020-.0040 in.

Free length 1-31/32 in.

Free length 1-23/64 in.

Tappet adjustment Hydraulic tappet unit compressed 1/8 in. from fully extended position.

ROCKER ARM

Fit in bushing 0005 - .002 in loose

End clearance 004 - .025 in.

PISTON

Fit in cylinder 001 - .002 in. loose

Compression ring side clearance 004 - .005 in.

Oil ring side clearance 003 - .005 in.

Piston pin fit Light hand press at 70°F

CONNECTING ROD

Piston pin fit 0008 - .0012 in. loose

End play between flywheels 005 - .025 in.

Fit on crankpin 001 - .0015 in. loose

OIL PUMP PRESSURE

At normal operating temperature and engine speed of 2000 rpm oil pressure should be 12 - 35 psi

IGNITION TIMING

Ignition timer air gap

1979 and earlier____

1980 and later

Ignition timing

(FullyRetarded) (Automatic Advance) Spark plug gap setting

TAPPETS

Guide fit 0025 tight - .0025 loose

Roller fit 0005- .001 in.

Roller end clearance 008-.010 in.

GEARCASE

Breather gear end play 001 - .005 in.

Cam gear shaft in bushing 0008 - .0018 in.

Cam gear shaft in bearing 0005 - .003 in.

Oil pump drive shaft (crankcase bushing) 0008 - .0012 in.

FLYWHEEL ASSEMBLY

Gear shaft nut torque . . Sprocket shaft nut torque Crank pin nuts torque . . Runout (flywheels) Runout (mainshaft)

SPROCKET SHAFT BEARING

Cup fit in crankcase 0012 - .0032 in. tight

Cone fit on shaft 0002 - .0015 in. tight

PINION SHAFT BEARINGS

Roller bearing fit 0004 - .0008 in. loose

Cover bushing fit 0005 - .0012 in. loose

0 0

Post a comment