The Double Compass from OVERREV is an ingenious test tool for determining wall thickness.

In the quest for performance, it often happens that you rework your Racing Cylinder mechanically. In doing so, the remaining wall thickness must always be taken into account in order to avoid an unintentional breakthrough. Without an exact measuring device, however, it is often only possible to make assumptions about these wall thicknesses. Which is why you don't venture to the limits of what is possible when machining.

With the simple and ingenious tool from OVERREV, the wall thickness can be precisely determined with ease. Especially in the area of the stud bolt channels or between the cooling fins, the Double Compass is indispensable. Thanks to its shape, you can also reach areas that are difficult to access and therefore always have an overview of the remaining material.

Conclusion: No good tuning workshop should be without this simple and ingenious tool.