Their website says it's approved for asphalt racing, that and a token will get you on the subway. WERA doesn't allow it and MotoAmerica doesn't allow it. HPR allows alternatives that are widely used and accepted - MMC was used by last years AMA Daytona Sportbike Class Champion, whose team is based here in Colorado. I've used water and Redline for years and never had a problem.

Are you putting as much effort into getting the dealer to explain why the other products void your warranty? FWIW, this is likely bad info. The Consumer Protection Act prevents vehicle manufacturers from denying warranty claims based on the consumer not using a certain brand of oil, they can only dictate the viscosity. I can't imagine they are able to say certain brands of coolant aren't allowed, either. I imagine the Maxima is the only product the dealer sells....the question is - do they sell only Maxima because anything else will void the warranty....or do they say anything else will void the warranty because they only sell Maxima?