A biker and his mates want to give back to Merle, a North Perth local who gave him $50 for helping her at a fuel station.

On Saturday, Dave Withnell was with his 'rough n tough' bikers inspecting their bikes at the North Perth Shell when Merle asked for help loosening her fuel cap.

Out of their kindness, Merle convinced the group to let her pass on $50 for thanks and now the 'Let's Ride Perth' Facebook group wants to give back to Merle with a joy ride around the city.

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