A female biker dubbed Russia’s sexiest motorcyclist has been killed in a horror crash while racing down a motorway.

Olga Pronina was racing through the city of Vladivostok in Russia when she lost control of her BMW motorcycle and ploughed into a side railing on Monday evening.

The 40-year-old mom-of-one, who was known as Monika to her legion of fans on Instagram, was thrown from the bike and died before the emergency services could reach her.

The daring brunette who had over 150,000 followers on the social media site was described by friends as an adrenaline junkie who loved riding at high-speed.

In one of her last videos posted on Instagram last month, the thrill-chasing biker – who also worked as a hairdresser – is seen straddling a motorcycle sideways and drinking from a straw while riding at high-speed.

And she warned her followers: “By the way, doing 250kmph and holding one hand is very uncomfortable. I do not recommend But I got my adrenaline dose.”

According to local reports, Olga had clocked up dozens of speeding offenses.

Shocked pal Eduard Hasanov told local media: “She was breaching every rule of safety and riding at high-speed pretty often. Her death is incredibly tragic.”

Another friend who arrived at the scene 10 minutes after the accident said: “She was high-speeding and the rear wheel of the bike was lying 600 metres from the scene.

“We tried to find her action camera, but could not find it.”

Police are not treating her death as suspicious.

Devastated fans have been quick to react.

Writing on her Instagram page, GNK_77.1 posted: “Condolences to the family and friends, this is huge tragedy. Sleep calm, crazy girl.”

Fan aaterihoff wrote: ”I wish you good roads in heaven.”

And katilda__in__law posted: “She got her adrenaline dose all right, once and for all…”.