A jet gauge allows for measuring the difference between two jets, the scale ranges from 45 to 150.

Time and time again we've seen cheap jets which are up to 15 sizes away from the size they claim to be and can make jetting a carb almost impossible. We use these in the workshop to double-check all jets before fitting or selling.

We also sell a large jet gauge for measuring jet sizes from 150 to 350.

Motoforce MF99.00801

• Universal