HONG Kong jockey ''Rambo'' Tse Wai-hoo earned his nickname for his gung-ho riding style, but taking his fearless attitude from turf to tarmac has landed him in trouble with the law. Tse, 27, found himself in custody on Thursday when he was arrested in Causeway Bay for allegedly driving under disqualification. The alleged offence could see ''Rambo'' lose his only valid licence - his riding ticket - as the Royal Hong Kong Jockey Club traditionally takes a dim view of jockeys involved in criminal proceedings. Police last night confirmed that ''Rambo'' was arrested at about 12.30 pm on Thursday in Kai Chiu Road, Causeway Bay. Tse was released on $3,000 bail and told to report to the Wan Chai Traffic Police on December 9. Ever since gaining his licence in 1985, ''Rambo'' has been a controversial figure, mainly for his aggressive horsemanship. He also gained a reputation for reckless riding, being penalised with a series of suspensions. However, it was his role in the notorious 1990/91 ''sex for tips'' scandal which saw him suffer his most severe punishment when the Jockey Club banned him for four months for breaching the rules of racing. In a headline-grabbing case Tse was awarded immunity from prosecution for giving evidence against two senior policemen who allegedly provided ''Rambo'' with prostitutes in exchange for race tips. The police officers involved were initially jailed for two years before being freed after their convictions were quashed under appeal.