for sometime now , I've been dealing with a coolant leak that I could not find on my 1800-C . Finally decided it was the radiator so I pulled it off and took it to All Cure radiators on Kuykendall. They tank tested it and sure enough it had a small leak around one of the bottom mounting brackets. They soudered it up and retested, no leaks. Turns out they do work for Motorcycles Unlimited. Cost $30 New radiator $250! Now just have to put it back on and hope that was the only issue. Just wanted to let everyone know in case you have a problem with yours.