You can't get a 450 2 stroke but you can get a 500cc 2 stroke.there is not one made now but there was a 450 cc two stroke dirt bike i know of,the 1974 Husqvarna Desert Master,this was a 450 and from what i read about it,it was a wretched bike.another one is the 1981 Honda CR450 and it was another loser,the CR480 and CR500 was much better.
No. I have a 100cc kx 100 2 stroke and i can race 450's and beat them. 2 strokes are faster off of the starting line and in a straight away race, but after maybe a mile 1/2 the 4 stroke will win
pastrana has a 2007 Rm250 2-stroke to do the freestyling. when it comes to racing he has the new RM-Z 450 suzuki 4-stroke.
Yamaha YZ 450 F for Track or WR 450 F for Enduro. I am of similar size and I have the mass to throw the bike around quite easily.
The most powerful dirt bike is the Honda CRF 450,It's power is rediculous!
For off road, KTM. For motocross for 2009, according to the guys at Motocross Action mag, the Kawasaki KX450F.
You will crash!
honda is a better motorcross bike (250 and 450) and yamaha is a better trail bike
For professional motocross, the biggest bike that is allowed to be raced is a 450 four-stroke. For local race purposes there is a Vet class that allows any size bike to be raced (usually up to 525 since that's the biggest motocross bike that KTM makes).
honda 450 r or x
same as the trx 450
The Kawasaki KX series is the best type of bike u r going to find and for the most power for your buy u need a 2 stroke because of the pick up and exceleration of the RMP's