Fits 1-1/4" handlebars. Chrome handlebar clamp. Incl wiring harness & 1/2-20 threaded allenhead drain plug. This is an engine pre-failure detection system. A sensor in the special drain plug monitors ferrous metals in the engine oil. At an abnormal high level the sensor will trigger a LED warning light to let you know something is going wrong. Chances are you can prevent expensive damage before it can actually occur. The warning light is placed in an attractive chrome plated or black anodized billet aluminum housing; which installs around the handlebar. Kit includes a sensor equipped 1/2-20 threaded drain plug; warning light with housing and a wiring harness that will install without splicing the stock wiring.