JIMS 1290 Instruction Sheet

No.1290-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 P P a a r r t t N N o o . . 1 1 2 2 9 9 0 0
2. Before installing the cam gear that you will be using, you must make sure that it matches the pinion gear you will be using.
3. Refer to JIMS® Catalog or H-D service manual for cam to pinion gear fitment chart.
NOTE: Always wash cam and gears before installing into tool. For Ease of aligning cam in tool, mark the backside of
gear with a felt pen for pinion gear timing mark. (See Diagram B). Also take note of the top of tool. (See Diagram
C) for early and late pinholes.
1. Place cam with gear into tool with pinion gear timing mark aligned with reference mark on top of tool. At the same time,
align the notch (See Diagram D) at the nose of cam with the locator pin in the bore of tool. (See Diagram C).
Rotate cam clockwise, until cam locks into tool.
NOTE: At this time the two knurled thumbscrews should be loose enough to move indexer plate clockwise or counter
clockwise.
2. Gently hold cam with light pressure in the clockwise direction, at the same time rotate indexer plate of tool clockwise or
counter clockwise to align pinholes to be in the center of two gear teeth (See Diagram B).
Slip in the two tapered pins No. 1298 into either the L marked holes for late cams or the E marked holes for early cams.
With both pins installed and still applying light pressure clockwise, tighten the two knurled thumbscrews.
3. With thumbscrews tight, you can release pressure on cam. With your felt pen, mark the two tapered pin locations on the
backside of gear. Just to be safe, record the degree that the tool is now locked at. If the long line on indexer plate of
tool is between two of shorter lines, this will be considered one degree.
4. Remove cam from tool by pulling cam straight up away from tool. NOTE: Always remove tapered pins from tool
as a safe guard for the next gear installation.
5. Press cam from gear using JIMS cam gear removal tool No. 1390. NOTE: You must have a .0017" to .0025" press fit,
for good cam to gear lock up.
CAUTION: Wear safety glasses. Excessive force may damage parts and tool.
over 200 other top quality professional tools. The last tools you will ever need to buy.
555 Dawson Drive, Camarillo, CA 93012 • Phone 805-482-6913 • Fax 805-482-9224
A Division of Thiessen Products, Inc.
JIMS
This precision tool will locate the cam gear on any 1970-99 Big Twin cam
shaft, and reposition it on another cam shaft in exactly the same position.
Pressing the gear on in an advanced or retarded position is also possible.
Save time and ensure accuracy time after time.
No.1290 - Use on all Single Cam 1970-99.
Tools needed: Press Fit Lube, 2-ton press and 3/8" ball bearing
NOTE: Read all instructions before using this tool.
Cam Gear Exchange Overview
1. Before removing the existing gear from the cam that you will be using, you must
first record the position of that cam and gear combination. For a reference
(See Diagram A)
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CAM GEAR INSTALLER
®
Rev D
7-15
See JIMS® catalog for
1