what model 'Bergs use similar clutch assemblies..? I'm trying to build a slipper for a Cannondale/ATK, and I believe some of the dimensions between them may be similar...I need a starting point model, there's a 501 clutch on the "auction site"I'm considering buying just for reference.NO one around me has a Husaberg that I know of,or one apart...thanx from southern Md.