Hey Ben, you can just shut the valve off to the coolant heated bars for summer use and you are done, no heat in the bars at all. No need to change anything for summer/winter. Also, the grips have a high enough electrical draw that you need to consider your stator and if it has enough power to keep your grips on (possibly your lights as well) and keep up to charging the battery. Bigger stator will handle this but its a significant added cost. Some bikes will have a bigger stator but in many cases, ie KTM and Husky MX bikes they do not. if you try and run both electric grips and lights you will have dead battery issues.