Arch-rivals David Knight and Taddy Blazusiak will battle it out in an old Shropshire quarry this Saturday.
This weekend's Enduro racing event could attract over 5,000 people (Aspect Event Photography)
This is the fourth staging of the Extreme Enduro event at Nantmawr in Oswestry, and it is expected to draw a crowd of at least 5,000 people.
Knight is the world number one and Pole Blazusiak is his young challenger and the pair have a major rivalry.
"It's a real coup, having the world's top two fighting it out here," said organiser Steve Ireland.
Anywhere you'd think a motorcycle couldn't go, they go. And all at high speed!
Ireland has described the event as a mixture of motocross, trials and lunacy all wrapped up in a two-hour race.
"Riders have to tackle a course containing huge boulders, log hills, jumps, lorries - in fact, anywhere you'd think a motorcycle couldn't go, they go," he said. "And all at high speed!"
British champion Tom Sagar, who lives a few miles away from the circuit in St Martin's, is the local hero.
The field also includes four-times former world champion Paul Edmonson.
Entry to the event on 26 January costs £15 per person and £10 per car parked. The first race is at 0930 GMT, with the main event at 1500 GMT.