3 Wheel Scooter "2 tires in Front"

[RyanosAlien]

Hey

Im currently building a 3 wheel scooter "2 tires up front" with the singe wheel in back, I went the easy route and modified a racing 4 wheeler and a scooter frame for my build, the problem being I need a motor strong enough to push this heavy thing, I thought scrappy dogs 200cc but im hearing alot of complaints about it, tires and brakes not working right, and the motor only being a 170cc, my question is for the people who has done the trikes what is the best size of motor to use on a build like this, and does any 1 know any sites for the 200cc plus sizes? and im currently waiting on my new mig welder to come in, my old welder finally bit the dust, in the mean time im getting the rest of ducks in a row.

P.S: Ill be using smaller tires up front and not the 4 wheeler style mudders.