A MOTORCYCLIST has been killed in an horrific high-speed accident in Harrisdale, in Perth's south.

The 30-year-old man came off his Harley Davidson in Wharton Road, Harrisdale, last night, colliding with an electricty pole about 1.30am.

Both his legs and an arm were severed in the horror crash and he died at the scene.

Police are investigating and believe high speed was a factor in the crash.

They said the man had not yet been identified, but earlier reports that man was linked to the Comanchero bikie gang are believed to be incorrect.

The overnight fatality brings the death toll this year to 54, compared to 63 at the same time last year.