Most powerful dirt bike ever made...?

[cowpoos]

What about sidecar motocross. Bona-fide competition dirt bikes. I seem to remember the WASP 1000cc 2strokes knocking out 90 - 100 BHP.

Do I win ?

nah...my one made 210hp

[Armitage Shanks]

Yamaha rereleased the 490 as a WR500 in the early '90's they tried to tame the beast within........I don't think they even got close. I remember one cartwheeling past me at a trailride. So in my eyes they still tried to kill their owner and anyone near them. Never make eye contact with an old 490, they will try to hurt you.

Might have been me, I had a WR500 in '95 and then went on trail rides around Canterbury, what a hoot that was ...put me in an ambulance more than once, that was the Bike I traded on the new KX500 while my dislocated shoulder was still in a sling not the 490 I mentioned before. Superior MC's and Marty Grenfell was the salesman. Still have a pic of the brand new KX500 on the trailer outside the shop, cheers

[McJim]

So if someone took say a Ducati Hypermotard (1100cc twin) or a KTM SM990 and swapped the motard wheels for dirt wheels (I presume this can done the other way) wouldn't that make a more powerful production dirt bike?

[B0000M]

So if someone took say a Ducati Hypermotard (1100cc twin) or a KTM SM990 and swapped the motard wheels for dirt wheels (I presume this can done the other way) wouldn't that make a more powerful production dirt bike?

yes, until you came to a bump larger than about 50mm in height!

pretty sure the swap cant be done that way either