Hmm, on the fence about that one Tony. I have both a Shumaker and a Battery Tender and both are trickle chargers and they are both "smart". I've brought back many a totally dead battery with them. 10amps can quickly overheat a motorcycle battery. I set my larger Shumaker to 10amps when I need to start a bike with a dead battery.
06 Paul Smart Sport Classic NFS ever.
08 S4RS Tricolore #081 NFS ever.
01 M600, aka, The Pink Monster
72 Norton Commando 750
03 KX60 just rebuilt the entire engine, with M600 rear shock, no wait now with S4RS rear shock...
Honda CB350F, Hodaka Ace90, 3x Yam-YGS1, Yam-CS3 200, Vespa small frame, Gilera 106, Puch Sabre, Puch 50 Boy Racer, Ducati 250 bevel, Benelli 250, Benelli 360, recently added a Honda CB350T, and many more.