As two Mongols faced court over firearms and assault allegations, Assistant Commissioner Stephen Fontana said police were monitoring the two former Fink office-bearers, who have been driven south by Queensland's strict anti-bikie legislation.

The Mongols, who patched over about 80 per cent of the Finks in Australia in the past 18 months, have been strengthened in Victoria by the Raiders MC, a support club once reportedly aligned to the Hells Angels.

Shane Bowden, who was linked to Finks extortion mob the Terror Team and infamously shot Melbourne CBD killer Christopher Wayne Hudson during the wild "Ballroom Blitz" on the Gold Coast in 2006, has relocated to Melbourne in the past 12 months. He and Greg Keating, another senior member who had reportedly moved to Adelaide about the same time as Mr Bowden left the Gold Coast for Melbourne, have been photographed together regularly in Melbourne.

Both men have been wearing a Nomads patch on their Mongols jackets, suggesting they are not members of any particular chapter but roaming members of the club.

Similar Mongols Nomads chapters have been established in Europe. Links between Australian members and clubmates in Europe and Asia have strengthened in recent months, and was a key factor in the defection from the Australia-based Finks.

Mr Fontana said the Mongols were not yet living up to their fearsome international reputation in Victoria, but police were concerned about the presence of two senior members in Melbourne. "They're not the worst we've got in Victoria at this stage, but they're certainly building their capability," he told Radio 3AW.

A man believed to be an associate of the Mongols, Jamie Peter Riseley, 20, faced court on Monday accused of assaulting two police in Port Melbourne.

Mr Riseley was pulled over by police on Plummer Street, about 1.5 kilometres from the Mongols’ Bertie Street clubhouse and charged with driving without a licence on March 22. He was also charged with two counts of resisting police in the execution of their duty, two counts of threats to kill and two counts of assaulting a police officer.

Mr Riseley appeared in the Melbourne Magistrates Court, where his bail was extended and he was given more time for his solicitor to take instructions.

His arrest in March came two weeks after the Mongols' Port Melbourne clubhouse and a tattoo studio linked to the club were raided by police.

Mr Riseley has also been charged with driving without a licence and providing police with a false name in relation to a police road stop at Newborough in April, 3013.

On Sunday, another member of the Mongols allegedly produced a firearm and threatened security staff after being denied entry to a St Kilda bar. Although the man's group was allowed entry, police were called soon after.

When police arrived the gang members fled east down Fitzroy Street before officers found them in a nearby car park. Two knives and a gun were also found. The 27-year-old Brighton East man was charged with being a prohibited person possessing a firearm and will face court later this month.