To get a long and healty life of your favorite NOVAROSSI engine you might get to the point that you need to change the High Quality ball bearings.Because of used tolerances inside the NOVAROSSI engines it can be difficult to remove the High Quality ball bearings from the engine.For a Easy and safe removal of your worn out or damaged bearings we have developed our "Ball bearing Extractor".Available in blue anodized alloy with laser engravings.The Kit has multiple ball bearing adaptors of different sizes, all the sizes of the rear ball bearing inner races that are used inside 2,1cc ~ 4,66cc NOVA, REX and TOP engines.When you have multiple engines but all with the same bearing dimensions, the Ball bearing Extractor is also available with only 1 ball bearing adaptor, ranging from 11mm to 14,5mm.