Motion Pro 08-0134 User Manual

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Motion Pro, Inc.

867 American Street
Tel [phone] Fax [phone]

www.motionpro.com

INSTRUCTIONS

INSTRUCTIONS FOR USING THE MOTION PRO P/N 08-0134

TORQUE ADAPTER WRENCH

The Motion Pro torque adapter wrench is designed to be used with a torque wrench to accurately

tighten the cylinder base nuts on two-stroke engines that you cannot reach with a socket wrench.

How to use the Torque Adapter Wrench:

When you mount the adapter onto a torque wrench, it effectively lengthens the torque wrench.

Therefore, the torque value set on the torque wrench will not be the actual torque that you apply to

the fastener. Before using the torque adapter, you must recalculate the torque specication listed in

the engine’s service manual. To recalculate your torque wrench when using the Motion Pro

adapter, use the extension formula included with these instructions.

To make conversions from one form to another, use the following torque conversion table:

MULTIPLY BY TO OBTAIN

foot-pounds (ft-lb.) 1.356 Newton-meters

foot-pounds 0.1383 kilogram-meters

foot-pounds 12.0 inch-pounds

inch-pounds (in.-lb.) 0.01152 kilogram-meters

inch-pounds 0.1130 Newton-meters

inch-pounds 0.08333 foot-pounds

kilogram-meters (kg-m) 7.233 foot-pounds

kilogram-meters 86.79 inch-pounds

kilogram-meters 9.806 Newton-meters

Newton-meters (N-m) 0.7375 foot-pounds

Newton-meters 8.851 inch-pounds

Newton-meters 0.1020 kilogram-meters

After recalculating the torque specication, write it down here for future reference.

TORQUE ADAPTOR CORRECTION CHART

MODEL Ft.-lb. N-m

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TORQUE ADAPTER EXTENSION FORMULA

To recalculate a torque specication when using the

Motion Pro Torque Adaptor, use the following formula:

R =

T x L

L + A

Corrected torque reading =

Torque required x wrench length

Wrench length + extension length

T = Actual torque reading as listed in the service manual.

L = Torque wrench lever length. This is the lever length of your torque
wrench — center of grip to center of drive (see drawing). Refer to
the instruction sheet that came with you torque wrench on how to
determine this length.

A = Torque adapter extension length. When using the Motion Pro Torque Adapter,
the torque adapter length is 3 inches (see note below).

R = Corrected torque reading (indicated torque value to set on torque wrench).

AL

NOTE: When using 3 inches for distance “A”, torque wrench and torque adapter must be in line.

If the adapter is positioned at an angle to the torque wrench, distance “A” will be decreased. When

the adapter is at a 90-degree angle to the torque wrench, distance “A” will be equal to zero (0).

Example: To tighten an engine’s cylinder base nuts to 20 ft.-lb. with the torque adapter, and a torque wrench with a lever length
of 12 inches, compute the extension formula as follows:

1. List all of the known formula variables:

2. Plug-in each of the formula variables
into the extension formula:

3. Thus, you can solve the formula as follows:

Solution: In this example, your torque wrench would register 16 ft.-lb., but the cylinder base nuts would be tightened to 20 ft.-lb.

T = 20 ft.-lb. (actual torque specication)

L = 12 in. (torque wrench lever length)

A = 3 in. (torque adapter extension length)

T x L 20 x 12

R =

R = 16 ft.-lb.

=

L + A 12 + 3

20 x 12 240
12 + 3 15

= =

I08-0134 042009