Rob Schley

There has been some talk in rec.sport.snowmobiles about Titanium Jack or Drive shafts. These items are sold with the catch phrase of "reduces rotating mass." While this is true, it isn't really the rotating mass that matters. What really matters is the "rotational Inertia."

Elsewhere on the Off-Road Snowmobile site, you'll find an outstanding article written by Rob Schley that explains the physics behind rotating mass. Rob understands it and explains it better than I ever could, but in a nutshell, the farther away from the center of rotation mass is, the more power it takes to move.

Editor's Note: Rob went to some effort in his selection of the SLP Silencer, so we asked that he write a companion review to the review of canisters Tom Avery did awhile back. Good work guys. Also note that any exhaust modifications are illegal in Wisconsin, and the DNR folks are looking for and ticketing violators.