Nothing wrong with the cooling system is it's maintained properly. It might get "warm" by the gauge, so unless it's boiling the coolant out of the expansion tank, there is nothing wrong with the cooling system. Hell my stock Dodge pickup comes with a 210 degree F thermostat, much warmer than the Vmax. Inadequate cooling would result in boiling coolant, head gasket failure, melted Pistons, spun crank bearings, and overheated engine oil. Even car engines get warmer while in traffic, or stopped. My 78 goldwing would get up to 3/4 on the gauge on summer days in upstate NY 75-80 degrees F. Fan would kick on and it would cool down. First you stated your v max got warm in traffic or when stopped then you stated your 1800 goldwing wouldn't go over half way when ridden hard, Wich I imagine it wouldn't while it's moving and had air flow to the radiator. Run your v max hard and see where the temp gauge goes. I got a 2018 Vmax and have had 0 issues with it overheating. It gets up to 3/4 fan comes on and it cools down but only in traffic, or when I'm stopped. Riding it runs around half way.