Question: International outlaw motorcycle club, Rock Machine, was formed in what year by a former friend of the worldwide one-percenter motorcycle club whose members typically ride Harley-Davidson motorcycles, Hells Angels?

Context paragraphs:
Sonny Barger: Ralph Hubert "Sonny" Barger (born October 8, 1938) is an American author and actor, who is a founding member (1957) of the Oakland, California, U.S. chapter of the Hells Angels Motorcycle Club.  He is the author of five books - "Hell's Angel: The Life and Times of Sonny Barger and the Hell's Angels Motorcycle Club" (2000), "Dead in 5 Heartbeats" (2004), "Freedom: Credos from the Road" (2005), "6 Chambers, 1 Bullet" (2006), and "Let's Ride: Sonny Barger's Guide to Motorcycling" (2010) - and editor of the book "Ridin' High, Livin' Free: Hell-Raising Stories" (2003).  Onscreen, Barger was identified but didn't speak in "Hells Angels on Wheels" (1967) and was one of several members of the Angels who had speaking parts playing themselves in "Hell's Angels '69" (1969); he has appeared in several additional films.  He also appeared in the "Sons of Anarchy" television show as "Lenny "The Pimp" Janowitz"

Warlocks Motorcycle Club (Pennsylvania): The Warlocks Motorcycle Club is a "one-percenter" Outlaw motorcycle club that was formed in Philadelphia, Pennsylvania in 1967.  It was the first official 1% outlaw motorcycle club founded in Pennsylvania.  The club is most prominent in the Philadelphia and Delaware County area, but they have territory all throughout the Delaware Valley (i.e. the Philly metro area), including South Jersey and Wilmington.  There are now chapters all throughout Pennsylvania, South Jersey, and Delaware.  The club's insignia is a Harpy, which in Greek and Roman mythology, was a female monster in the form of a bird with a human face.  Their colors are Red and White.  The club rapidly expanded at the end of the Vietnam War when thousands of soldiers returned home to the United States, many to Pennsylvania.

Hells Angels: The Hells Angels Motorcycle Club (HAMC) is a worldwide one-percenter motorcycle club whose members typically ride Harley-Davidson motorcycles.  The organization is predominantly white male and considered an organized crime syndicate by the United States Department of Justice.  In the United States and Canada, the Hells Angels are incorporated as the Hells Angels Motorcycle Corporation.  Common nicknames for the club are the "H.A.", "Red & White", "HAMC" and "81".

Black Sabbath Motorcycle Club: The Black Sabbath Motorcycle Club Nation is a national Motorcycle Club whose members ride all makes of street legal motorcycles (cruisers at least 750cc and sport bikes at least 600cc).  s of 2014 , it is not listed by the United States Department of Justice or California Department of Justice as an Outlaw Motorcycle Club or Gang.

Bacchus MC: The Bacchus Motorcycle Club (BMC) is a Canadian one-percenter motorcycle club whose members ride only Harley-Davidson motorcycles.  The name "Bacchus" is derived from an alternate name for Dionysus, the Greek god of wine, women and song.  The name of the club originates from the cult and city religions symbolism of Dionysus, who was regarded as the protector or guardian of those who do not belong to conventional society.

The Breed Motorcycle Club: The Breed Motorcycle Club is a one-percenter motorcycle club that was formed 65 miles northeast of Philadelphia in Asbury Park, New Jersey in 1965.  It was at one time one of the most powerful and feared motorcycle clubs in the Northeastern United States, with a number of chapters in New Jersey and Pennsylvania.  Although The Breed were founded in the 1960s, the gang did not start to expand rapidly until the early 1980s when members of the Aces and Eights Motorcycle Club, based in Riverside, New Jersey, patched over in 1983.  In 1986, the Branded Motorcycle Club was absorbed into The Breed.  The Breed headquarters was moved to Bristol Township, Pennsylvania.

Sin City Deciples: Sin City Deciples ["sic"] is a "one-percenter" outlaw motorcycle club that started in Gary, Indiana in 1966.  Though most club members are black, the club is open to all men, regardless of race or color.  The club is known for having a large number of charity organizations.  A high percentage of military veterans have join the club a high number of doctors, lawyers & corporate Americans have join this club.  Members ride Harley-Davidson motorcycles.  Members pride themselves on the tight knit brotherhood they have developed over years of riding with each other from state to state.  With charters that span from coast to coast in the United States and in Europe, they are one of the oldest and largest black outlaw clubs in existence.Membership totaling 16,657 active members "Deciples" is a portmanteau of the words "decibels" and "disciples."

Blue Angels Motorcycle Club: The Blue Angels Motorcycle Club (BAMC) is a one-percenter motorcycle club that was formed by Allan Morrison and Billy Gordon in the Maryhill area of Glasgow, Scotland in 1963.  "Blue" stands for Bastards, Lunatics, Undesireables and Eccentrics but the name also came from other sources; blue is the main colour of the Scotland flag.  The Blue Angels are one of the largest motorcycle clubs in the United Kingdom, only falling behind the Outlaws, Hells Angels and Satans Slaves.

Rock Machine: Rock Machine, or Rock Machine M.C., is an international outlaw motorcycle club with six Canadian chapters, six US chapters and eight chapters in Australia.  It was formed in 1986 by Salvatore Cazzetta, a former friend of Hells Angels Quebec chapter president Maurice Boucher, and competed with the Hells Angels for the street-level drug trade in Montreal.  The Quebec Biker war saw Rock Machine form an alliance with a number of other gangs.  The conflict occurred between 1994 and 2002 and resulted in over 160 casualties and an unknown number of injuries.

Lennoxville massacre: The Lennoxville massacre, or Lennoxville purge, was a mass murder which took place at the Hells Angels clubhouse in Lennoxville, Quebec on March 24, 1985.  Five members of the Hells Angels North Chapter, founded by Laurent "L'Anglais" Viau and Yves "Apache" Trudeau, were shot dead.  This event divided rival outlaw motorcycle gangs in Quebec, leading to the formation of the Rock Machine club, a rival to the Hells in the 1990s.

Supporting paragraphs: Rock Machine Hells Angels
Answer: 1986