⭕ 1948 Indian BONNEVILLE Chief 74 ci engine

Cast iron oil pump

Chrome valve spring covers

Good oil scrapers

BONNEVILLE cams and followers

Edison magneto - HOT and ready to run

Oil baffle missing in front cylinder hole

Good tranny gears

BONNEVILLE heads with only two (2) broken fins

New valves, valve springs and Bonne pistons


ENGINE CLEARANCES




LOCATION

SPEC

AS BUILT


CAM SHAFT BUSHING

.0005 to .0015

0.0005

CAM SHAFT END PLAY

.004 to .008

0.006

CONNECTING ROD SIDE PLAY

.015 to .020

0.015

CONNECTING ROD ROLLER BEARING
.0005 to .0015

0.0005

PINION and DRIVE SHAFT ROLLER BEARING
.0005 to .001

0.0005

FLYWHEEL END PLAY----------------
--------SPROCKET ON
.005 to .010

0.010

FLYWHEEL END PLAY----------------
-------SPROCKET OFF
.015 to .030

0.019



PISTON - CYLINDER CLEARANCE
---------------------FRONT
0.005

0.006

PISTON - CYLINDER CLEARANCE
-----------------------REAR
0.005

0.006

PISTON RING GAP

.010 to .020

.012 - .018


VALVE - LIFTER CLEARANCE------
--------------------INTAKE
stock=.004 bonn=.006
0.006

VALVE - LIFTER CLEARANCE------
-----------------EXHAUST
stock=.006 bonn=.008
0.008

VALVE SEAT DEGREE

35°

35°

VALVE FACE DEGREE

35°

35°


PINION SHAFT RUN OUT

0.001

0.0005

DRIVE SHAFT RUN OUT

0.001

0.0005

PISTON SIZE
74 cubic inch Bonneville

+40
BEARING SIZE
0.249