This is a flat-bottom tank

Replacement for OEM #37-7042

Nevertheless

pull open/pull close throttle assembly

6T and TR6

Whiskey Throttle Tube - Aluminum - 1 inch Motorcycle Specific_Harley-Davidson Sportster This is a flat-bottom tankCNC machined 6061 T 6 aluminum construction Fits 1 inch O. D. handlebars, accepts dual cable throttle assemblies Knurled alloy tube accepts aftermarket rubber grips Black electroplate or clear anodized over raw aluminum finish Retrofits to many model year stock and select aftermarket H D hand controls Stock Harley grips are molded to a flexible plastic tube inside the hand control, and don't provide the precision feel befitting a custom motorcycle.