Police have charged nine Coffin Cheaters motorcycle gang members and affiliates with giving false and misleading evidence over the shooting and stabbing of members of a rival gang at the Perth Motorplex in October last year.
The Coffin Cheaters members were called before a private Corruption and Crime Commission hearing not long after rival gang members from the Finks, including those injured in the fracas at the popular drag-racing meet, were charged with being in contempt of a similar CCC hearing.
The Coffin Cheaters' six members, including the most senior leaders and three nominees, face 29 charges of giving false and misleading evidence, while two also face charges of disclosing a restricted matter, which relate to the summons to court and potential evidence given.
They face a maximum penalty of five years in prison and $100,000 in fines, and a potential further three years jail and $60,000 in fines for disclosing a restricted matter.
Three members are due in Perth Magistrate's Court on July 29 and the others on August 5.
Assistant Police Commissioner Nick Anticich said since police exercised exceptional powers authorised by the CCC, Five Finks members, including Stephen Wallace and Tristan Allbeury, have been jailed for two years over their attempt to keep information from police.
"They are not above the law and hopefully these laws will bring them to heel," he said.
"...Once upon a time they ran wild and free but the world is changing and the code of silence is no longer excused."
He said there were very few Finks left outside jail and he believed the exceptional powers had made a "significant impact" on creating a base in WA.
"There are very few (left) and many are residents at the new club house in the prison," he said.
He said over the past 10 months the police strikeforce squad tasked with targeting outlaw motorcycle gangs had charged 24 gang members and carried out 53 drug search warrants.
They had seized 409 grams of methylamphetamine, 460g of cocaine, 125g of ecstasy, 3 kilograms of cannabis, two vials of steroids, $223,000 in cash, two guns, a Taser, ballistics vest and other weapons.
Also $1.3 million in assets have been frozen, including two houses, a Harley Davidson motorcycle and $30,000 in shares.
Mr Anticich said there was an ongoing concern with the "patching over" of international clubs