Original owner of 1979 XS1100 with only 25K miles and in great shape. Looking for the dimmer switch part located in housing on left handlebar. It looks like a clear plastic half moon and when moved chages headlight from Hi to Low. Shaft part that attaches to outside finger push/pull knob broke off of plastic part inside housing. If someone has a part or knows where to locate please email at kramoin@nfp.com or can call C: 512.791.9445, W: 512.697.6944. Thanks.