Chain Monkey – Motorcycle Chain Tensioning Tool


In stock

Chain Monkey by Tru-Tension is a revolutionary chain tensioning tool, designed to enable precise chain tension for motorcycle and motorsport enthusiasts.

In stock



Chain Monkey is the world’s first tool designed to help you set the tension on your motorcycle’s drive chain. The task of tensioning a chain can be a tedious and time consuming task, especially on motorcycles. But not anymore.

By using Chain Monkey, anyone can set their chain tension quickly, easily and with minimal knowledge required. From new riders through to experienced mechanics, Chain Monkey will simplify the task, optimise performance and save you money through its revolutionary, patented design.

Improve Performance
Prolong Sprocket Life
Increase Chain Life
Optimise Power Delivery
Smoother Ride

How to use your Chain Monkey

Before you begin, remove black plastic cap from domed nut.

Step 1: Using your motorcycle’s manufacturer manual, specify how much slack your chain requires in mm or inches. Measure the size of your chain and use the table to identify your required Chain Monkey setting.
Step 2: Align bottom of domed nut with required setting line and adjust circular stop until it touches the orange base.
Step 3: Hook on to chain and tighten until circular stop touches the orange base.
Step 4: Tighten chain until all slack is removed while centralising wheel.
Step 5: Remove from chain. Required tension will now be set.

Top Grain Overlay

The Chain Monkey can be used to not only set tension, but also to check it:

Hook the Chain Monkey onto the chain.
Align the bottom of the domed nut to the required setting line, and adjust the circular stop until it touches the orange base.
Undo the Chain Monkey and hook onto the chain, then tighten the centre bolt until the circular stop touches the orange base. If you are unable to tighten the Chain Monkey to this setting, your chain is too tight, and if there is still slack present, your chain is too loose.

Tell-tale signs that suggest your chain tension isn’t set correctly include:

A ‘wurring’ sound as you accelerate
Knocking between gear changes
The chain looking under strain when you sit on the bike

It is advised you check your chain tension every 2 or 3 times you refuel, or every 500 miles, whichever comes first.

Chains will wear out over time and will inevitably need replacing. How often it requires replacing will depend on the quality of the chain, as well as how it is ridden, the condition of the sprockets and how it has been maintained.

A variety of factors will affect how often you need to replace your chain. A chain can last anywhere from 500 to 5,000 miles so it depends on the quality of your chain and how often you ride your bike.

Setting your chain to the correct tension will optimise performance and power delivery, prolong chain and sprocket life and help to provide a smoother ride.

The Laser Monkey is an innovative laser alignment tool designed to provide precise wheel alignment for both chain and belt driven motorcycles, of any make and model.