Warning comes following two incidents on Tuesday
Police are appealing for riders to take care on the Island's roads after two motorcyclists sustained serious injuries on the Mountain Road.
Bikes were involved in crashes at Joey's and Black Hut yesterday, forcing police to close the road while investigations took place.
Officers have also stopped a vehicle attempting to go against the one-way system currently in operation on the route.
'Too early to tell' what caused fire
Crews from across the Island ensured cover was available
Firefighting foam may have killed fish in Silverburn River
People advised not to enter the water for 28 days
Additional road closure for TT filming ahead of MGP qualifying
Sunday morning closure along Quarterbridge and Peel Road
'Knives and sharp implements' left outside charity shops
Fly tipping warning from police after instances outside Crossroads