SpinFaktor X
Manufacturer YoYoJam
Release date 2010
Shape Butterfly
Color Various
Weight 66.2 grams
Dimensions Diameter: 56.9mm
Width: 40.8mm
Material Plastic with aluminum midship weights
Bearing size Size C- YYJ Large Thin
Size C YYJ Large Speed
Response system YYJ Silicone O-rings

The SpinFaktor X (SFX for short) by YoYoJam is a yo-yo released in 2010, to celebrate the 10th anniversary of the original SpinFaktor's release.


The SFX is the latest incarnation of the legendary SpinFaktor series. Only this time, it has two new innovations brought to the table by YoYoJam; instead of the aluminum weight rings being positioned at the rims, they are placed in a midship position for a balance between control and stability, along with the Solid Spin Axle system, which brings together the body halves as if they were a completely solid metal unit, resulting in smoother spinning, increased strength and much better longevity. In addition, the Solid Spin Axle also features an adjustable string gap that can adapt to narrow or wide C-bearings.

Speaking of which, the yo-yo has two different C-bearings included; a narrow bearing for basic to intermediate tricks, and a dry, 10-ball Speed Bearing for advanced, unresponsive play.