Welcome to the ShockClock

1- Introduction

1.1 Ultrasonic Transducer Principles

1.2 Standard vs. Pro Kit

1.3 Dirt vs. Street

1.4 Accessories

1.5 Computer Requirements

1.6 ShockClock Specs

1.7 General Safety

1.8 Warranty and Copyrights

1.9 Technical Support & Contact

2 - Installing PC Software

2.1 Uninstall Prior ShockClock Software

2.2 Install ShockClock Software

2.3 Installing a USB/Serial Adapter

2.4 Determine the COM Port Number

2.5 Perform a Trial Download

3 - Hardware

3.0 Hardware Overview

3.1 Dirt Bike Mounting

3.1.1 Front Transducer Mounting - Dirt

3.1.2 Rear Mounting - Laid-Down - Dirt

3.1.2.1 Laid-Down Transducer Geometry

3.1.3 Rear Mounting - Vertical - Dirt

3.1.4 ShockClock Mounting - Dirt

3.2 Road Race Mounting

3.2.0 Road Race Mounting Intro

3.2.1 Front Transducer - Conventional - RR

3.2.2 Front Transducer - Upside-Down - RR

3.2.3 Rear Transducer Mounting - RR

3.2.4 ShockClock Mounting - RR

3.3 Mountain Bike Mounting

3.3.0 Mountain Bike Mounting Intro

3.3.1 Front Transducer - MB

3.3.2 Rear Transducer - MB

3.3.3 ShockClock Mounting - MB

3.4 Adjusting the Tubes

3.5 Shortening the Tubes

3.6 Transducer Maintenance

4 - Using the ShockClock

4.1 Operate the ShockClock

4.2 Testing Tips

4.3 ShockClock Problems

5 - PC Software Basics

5.1 Startup Screen

5.2 Preferences

5.3 Downloading

5.4 Opening Files

5.5 Closing Files

5.6 File Information

5.7 Import Older Files

5.8 Export to Excel

5.9 Graph Basics

5.10 Set the Zero Point

5.11 Select Data Range

5.12 Notes

6 - Analysis

6.0 Analysis Intro

6.1 Single File Analysis

6.1.1 Bottoming (& Travel)

6.1.2 Travel & Velocity Overview

6.1.3 Waveform Analysis

6.1.4 Rebound Push Test

6.2 Comparing Files

6.2.1 Settings vs. Results

6.2.2 File 1 vs File 2

6.2.3 Travel Histogram

6.2.4 Velocity Histograms

6.3 Analysis Procedure

6.3.1 Troubleshooting

6.3.2 Analysis - Dirt - PDA

6.3.3 Analysis - Road Race

6.3.4 Analysis - Mountain Bike

7 - Measuring Static Sag

7.1 The Sag Concept

7.2 Sag Procedure

7.3 Calculating Sag

7.4 Sag Guidelines

8 - Leverage Ratio

8.1 The Leverage Ratio Concept

8.2 Mounting the Transducers

8.3 Leverage Ratio Measurement

8.4 Creating a Leverage Ratio File

8.5 Lowering or Raising a Bike

8.6.1 Leverage Ratio Comparison

8.6.2 Rear Wheel Force Comparison

8.7 Convert a ShockClock Recording

9 - Convert to Vertical - Dirt

9.0 Convert to Vertical Overview

9.1 Laid-Down Transducer Mounting

9.2 Laid-Down Transducer Geometry

9.3 Convert Data to Vertical

10 - PDA Help Guide - Dirt

PDA Getting Started

PDA About the ShockClock

PDA Tips

PDA Installing Software

PDA Create a Trial Recording

PDA Hardware

PDA Dirt Bike Mounting

PDA Front Transducer Mounting

PDA Rear Laid-Down Mounting

PDA Laid-Down Transducer Geometry

PDA Mountain Bike Mounting

PDA Front Mountain Bike

PDA Rear Mountain Bike

PDA Rear MB Laid-Down Geometry

PDA Operate the ShockClock

PDA Adjusting the Tubes

PDA Shortening the Tubes

PDA Transducer Maintenance

PDA Accessories

PDA Software

PDA Prefs

PDA Downloading

PDA Opening a File

PDA View Results

PDA Graph

PDA Peaks

PDA Settings & Notes

PDA File 1 vs File 2

PDA Closing Files

PDA Synchronizing Files with a PC

PDA Technical

PDA ShockClock Problems

PDA Technical Support & Contact

PDA ShockClock Specs

PDA Data Analysis

PDA Dirt Analysis

Glossary

Glossary of Software

Glossary Suspension Hardware

Troubleshooting Glossary

This is the original rear mounting for dirt bikes.  The best mounting is to "lay the transducer down".  See 3.1.2 Laid-Down Rear Mounting.

> General Vertical Rear Transducer Mounting Setup

Mount the Transducer Wave-Guide Tube close to vertical when viewed from all angles.  Securely zip tie the Transducer cable.  Adjust the Tubes to avoid damage from hard bottoming and full extension.

 

• When you have completed this section go to 3.4 Adjusting the Tubes.
• Use 15" Travel Wave-Guide Tubes. This is good for most full size dirt bikes. 

 

Note: Do not plug the end of the inner tube it is an air vent.

 

Please follow these instructions carefully or damage to the Wave-Guide tubes may result. 

---

> Upper Rear – Vertical

Typical installation is on the left side of the bike (the side without the pipe).  Find a side panel, fender or seat mount and attach the upper bracket horizontally (you may need to remove the side panel).  Tighten securely. 

If the supplied upper bracket does not work use 3/4”x 3/16” (19 x 5 mm) steel flat stock and make a custom length (bending it as necessary).  Do not use aluminum as it will fatigue and break! 

 

Zip-tie the transducer cable securely then route it across the bike frame to the handlebar mounted ShockClock.  Make sure the cable is not stretched when the bars are turned.

---

> Lower Rear – Vertical

For hollow rear axles choose the correct lockstem to fit in the axle.  There are three sizes supplied to fit most models.  Wrap the lockstem with masking or duct tape to fit “in-between” sizes.  My favorite is the Blue Painters Masking Tape.  It is easy to handle and comes off easier.

 

This photo shows the completed assembly ready to be inserted into the axle.  Locate the clamp within 1/2” (12 mm) of the bottom of the tube.  Tighten the pinch bolt securely.  Do not plug the end of the inner tube it is an air vent.

If the axle is not hollow you will need to make a custom bracket.  Locate the pivot point close to the center of the axle or vertically above it. 

 

Insert the assembly into the hollow axle and tighten it.  Wiggle the clamp and tube to check that it moves freely. 

The complete rear assembly should have the transducer tube mounted approximately vertically when viewed from all angles.