JIMS 785 Instruction Sheet

No.785-IS
I I n n s s t t r r u u c c t t i i o o n n S S h h e e e e t t F F o o r r T T o o o o l l # # 7 7 8 8 5 5
F F l l y y w w h h e e e e l l R R u u n n o o u u t t ( ( T T r r u u e e n n e e s s s s ) ) I I n n s s p p e e c c t t i i o o n n G G a a u u g g e e , ,
No. 785 - Use on 1970 to present Big Twin Shovel, EVO, and Twin Cam
Check flywheel runout with flywheels in the engine case.
Check the amount of gear lash on gear driven cams used in
some Twin Cam engines. All V-Twin flywheels must be true
when running within an engine.
H-D Service Manual for non -Timken bearing engines 2003
and up lists a service wear limit of .005". This amount is
checked in a truing stand. JIMS new flywheel gauge has
been designed to check flywheel Runout of the Pinion shaft
(Crankshaft) while assembled in engine case. Engines with
the left side Timken bearing (all JIMS engines have Timken
bearings) show a service wear limit of .003". When check-
ing flywheels installed in the engine case, the runout will be
greater than when checked on a truing stand. The best way
to use this Runout gauge is with JIMS Tire Rotator Tool No.
936. By using a tire rotator you can relieve more of the
stress being applied to the flywheels than rotating the
engine with the electric starter motor. This tool can also be
used to check cam gear clearance (backlash) see below for
more information.
No. Qty.
1
2
3
4
5
6
7
NOTE: PLE SE RE D LL INSTRUCTIONS COMPLETELY BEFORE PERFORMING NY WORK!
IF YOU DO NOT KNOW WH T YOU RE DOING, DO NOT DO IT!
No information in this instruction sheet pertaining to motorcycle repair is represented as foolproof or even altogether safe.
Even something safe, done incorrectly or incompletely can and will backfire. You and only you are responsible for the safe-
ty of your repair work and for you understanding the application and use of repair equipment, components, methods
and concepts. Each and every step this tool is designed to do must be carefully and systematically performed safely by
you. All information listed in this instruction sheet has been tested, re-tested and used daily in JIMS
Development Department.
LW YS WE R S FETY GL SSES OR OTHER F CE ND EYE PROTECTION SUCH S FULL
F CE SHIELD. JIMS
IS NOT RESPONSIBLE FOR THE QU LITY ND S FETY OF YOUR WORK.
555 Dawson Drive, Camarillo, CA 93012 Phone 805-482-6913 • Fax 805-482-9224
Division of Thiessen Products, Inc.

PARTS AVAILABLE SEPARATELY

Description
1 INDICATING PLATE
1 1" DIAL INDICATOR .001 RESOLUTION
2 THUMBSCREW, 1/4-20 X 1-1/2"
1 THUMBSCREW, 10-32 X 1/2"
1 SPACER, 1/4" X 1/2" X 1"
1 SCREW, 1/4-20 X 1-3/4"
1 INSTRUCTION SHEET
IS NOT RESPONSIBLE FOR D M GE, INJURY, OR YOUR WORK. JIMS
®
5
Part No.
3
785-1
940-4
1391
1392
1085
1122
785-IS
FIG 1
6
3
® Research and
Rev C
8-13
2
4
1
®
1 1