1980s Harley-Davidson XR750 Nitro Hillclimber Back to contest Vote Description 1980s Harley-Davidson XR750 Nitro Hillclimber Built by three-time AMA Pro Hillclimbing Champion Tom Reiser, this nitromethane-fueled XR750 has to be one of the most menacing competitin motorcycles in existence. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Δ Share OK More