Motorcycle paddock starter

[Voicecoil]

The reason for the trip out will be that the motor takes WAY more than it's normal running 6A on startup: I have a rather similar motor here (1.25HP continuous, 1.75 intermittent) and it draws about 18A when starting from still. Ideally you want a power supply that ramps up it's output at a sensible rate, or one with constant-current limiting which will have something like the same effect. Your simple bridge supply thing might work if used for a short period, but you'll be properly caning the motor as the cap will charge to about 325V off load, nearly twice what the motor is rated at =4x the power. And if you do try it remember you will have NO mains isolation (though the 325V DC is a lot more dangerous than mains anyway), so Sterob's suggestion of a stepdown transformer is a good idea.
A little while back there was a guy from Hungary that was selling some nice PWM DC motor controllers on the Bay of fleas for around £100, with current limiting, soft start etc., unfortunately I can't see them there at the mo. though eBay seem to have been fiddling with their search engine of late (WHY???) so it may be that's the reason. If I find a link I'll post it up here.