Maree Brown and Janie Norris yesterday revealed the heartache of losing their son and brother, who was killed instantly in a car crash in Perth this week.

Mark Norris, 25, moved to Western Australia six months ago in an attempt to earn enough money to buy a house for his partner Tina Currell and three step-children Cody, Gabby and Millie back in Warrnambool.

It was supposed to be an adventure, crossing the Nullarbor in his trusty ute to live his dream of working as a motorcycle mechanic.

But it ended tragically early Sunday morning, when he crashed his ute head-on into a tree off a suburban Perth street.

Ms Norris, who lives in Karratha, said he wasn't just her sibling but best friend. She said her brother was able to make friends within seconds and loved talking to people.

"He was popular, but not an extrovert. He had a quiet way," she said.

"Mark was a kind, gentle person who was good listener. There is just such a big gap in our lives."

Ms Norris was unsure how the accident happened.

She said emergency services found a CD in his hand and told her the accident would have happened in seconds.

Mark, a former student of Warrnambool College, developed his love of motorbikes and the outdoors, particularly fishing, growing up on his family's Hopkins Point Road property and helping out friend Basil Hall on his farm.

His mother, Ms Brown, said her son rang her every night when he made his Nullarbor crossing.

"I was worried about the driving over there on his own. I knew the Nullarbor was a sealed road," she said. "But when he got to Perth I breathed a big sigh of relief, I knew my boy was now safe ? but you're never safe, you never know what's going to happen.

"He was a delightful young man."

His father John Norris said his son was beyond his years being able to talk to any age group. "He was the apple of his family's eye," Mr Norris said.

Ms Currell, who met Mark five years ago, said he loved her children and was able to keep them entertained for hours with his general knowledge.

"He was always going to come back to Warrnambool. This was his home and he loved it here.

"It's a big shock, he will be missed by so many people."

Ms Norris' fianc? Aaron Revie said he developed a close bond with Mark in the two years he knew him.

"I was looking forward to being his brother-in-law for the rest of my life," he said.

"The kids adored him and hung off his every word.