Apr.3 (GMM) Michael Schumacher has put a lid on gossip that he intends to step up his foray into motorcycle racing.

The most successful formula one driver of all time, who retired in 2006, has been dabbling on two wheels lately, including his semi-professional debut with a fourth place in Italy last weekend.

But while in Brussels for an anti drink-driving campaign on Wednesday, the 39-year-old German insisted that his hobby motorbike racing is mere "personal entertainment" rather than the launching of a new career.

It was rumoured in recent days that Schumacher's next target might be a wildcard entry for the German MotoGP grand prix later this year at the Sachsenring.

"I am not trying to be a new Rossi or Stoner," the Spanish news agency EFE quoted him as saying.

Schumacher is also adamant that he will never again get serious about professional four-wheel racing, insisting that occasionally testing for Ferrari is "fun, but only for a day at a time".