Cam Chain Tensioner O-Ring V4, 857176

Fitment - RSV4 09-23, Tuono V4 11-23

Genuine Aprilia Cam Chain Tensioner O-Ring, part number 857176, item number 13 in the diagram.

Unfortunately these can perish over time which means they don't create the seal required and in turn can lead to cam chain tension issues. Generally it's a rattle like sound from the front right or rear left of the engine, maybe both, that doesn't disappear after a few seconds of the engine starting.

Once the cam chain tensioner is removed or CCT as it also referred to, the old seal can easily be removed and this new o-ring one put in its place.

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