RSV4 Inspection Cover; Oil Filler Plug; Tank Airbox Spacer. CNC Machined from 6082T6 aluminium, Annodised in green and engraved, this kit has been manufactured to fit your Aprilia RSV4. It includes an engine Inspection Cover; Oil Filler Plug and Tank Airbox Spacer. It will add a trick WSB superbike look to your motorcycle. Manufactured in the UK.