Noticed my reservoir cap was split whilst changing clutch fluid recently. Needless to say this AP part is only available as a complete reservoir with cap and mounting bracket under part number MBH1805 and around £46 from MMC if still available, since usual parts dealers don't appear to stock. Image below shows replacement item with old split cap. Note this item is listed to suit all trads from 2006 and probably earlier.

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Checked on the AP website and under racing items an identical looking part appears under a collage of other parts. Unfortunately there is no AP listing for this item so it may already have been discontinued. A search on eBay revealed they are available from a couple of sources listed as "AP style". Given it was only £14.99 delivered I took a gamble. Pleased to say cap fits perfectly on OE body and whole replacement is as near identical as I can judge. Click pic above for source.

This may be useful for someone doing a rebuild or as heavy handed as myself when replacing cap blush

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone