I've been on this site for a while now and don't think I have ever seen a definitive answer on what internal geared hubs will break and which ones won't under normal 2 stroke 2 hp motor bicycle motoring. Some have said that a Shamano enter 3 will hang with a 48cc China girl with no problems. But I wonder about an 80cc (66cc) China girl. Or a 2 1/2 hp 4 stroke Greyhound ? I know "someone" must have bought a hub at Jensen USA on this forum. If so you must have had good luck with it because I called Jensen and asked them and they say they never have any of there Internal gear hubs come back, Sturmey or Shamano ? Something just doesn't seem to add up as far as the info that has been being passed around and the truth about Motorbike vs. internal geared hubs. Please, any of you forum members that have had any actual experience with internal geared hubs on motored bikes please step up and be heard. So we will not depend on all this hearsay about IGHs. Thank you for your input.