They thought the bikes would be safe unlocked a few metres away from their campsite, but that changed when they saw them being ridden away.
"We wanted to try a new experience. The beginning is perfect but now it is terrible."
Miss Vignoli said she was left feeling unsafe after the incident. However, she said they were grateful to The Backyard Inn for upgrading them from a camping site to a chalet free of charge to help make them feel safer.
While they knew there were bad people anywhere, the theft had left them with bad memories of Rotorua.
Anyone with information on the bikes - black with green Merida branding - can contact Constable Pete Riordan at the Rotorua police.