Piaggio 830276 Cylinder Base Gasket 0.6 mm – Beverly, MP3, X8, X9, Nexus, Fuoco, Atlantic and Scarabeo 400/500/850

The Piaggio 830276 cylinder base gasket, with a thickness of 0.6 mm, is the original spare part that seals the cylinder to the engine crankcase on the large 400, 500, and 850 cc 4-stroke engines from the Piaggio Group: Piaggio Beverly 400 and 500, MP3 400 and 500, X8 400, X9 500, X10 500, and X Evo 400, Gilera Nexus 500, Fuoco 500, and GP 800, Aprilia Atlantic 500, Scarabeo 400-500, Mana 850, and SRV 850. It is the gasket that maintains the seal between the cylinder and the base and determines the engine's squish: this is why it is available in different thicknesses, and the correct one must be used for installation. New spare part, original Piaggio code, from Moon Bike S.r.l. — Cercola (NA).

✓ Strengths

• Original Piaggio code 830276 – the same component installed during production
• Stated 0.6 mm thickness – for base gaskets, thickness is the crucial factor, not a minor detail
• One code for the entire 400-500-850 family – Piaggio, Gilera, and Aprilia
• Seal on the crankcase – prevents oil leaks and compression loss from the cylinder base
• Mandatory replacement whenever the cylinder is disassembled – a crushed gasket cannot be reused
• New product, never installed · shipping from Italy

Technical specifications

Compatibility

Compatibility source: official Piaggio spare parts catalog (B2B), EMEA, APAC, and NAFTA markets. The full list includes over 50 versions and configurations: the one above is a summary by brand. If your vehicle is not listed, or if you are not sure about the thickness to install, send us a message before ordering.

Who it is perfect for

It is for those who are opening the engine of a Piaggio Group 400-500-850 maxiscooter or motorcycle: thermal group rebuilding, piston and ring replacement, or repairing an oil leak at the cylinder base. It is the classic, low-cost spare part that cannot be skipped: reassembling the cylinder without a new gasket, or with a thickness other than the one specified, means having to reopen the engine shortly after. It is also the part that workshops keep in stock because a single code covers most of the Piaggio, Gilera, and Aprilia maxiscooters currently in circulation.

Frequently Asked Questions

Why is the thickness so important?
Because the base gasket determines the height of the cylinder on the crankcase, and therefore the squish and the compression ratio. Installing one thicker or thinner than specified changes the engine's behavior and, in the worst cases, brings the piston and valves dangerously close together. This is the 0.6 mm version.

Can I reuse the old one?
No, it is single-use. Tightening deforms it permanently: re-installing it will almost certainly result in a leak shortly after. It is the cheapest piece in the entire overhaul.

How do I know if the base gasket has failed?
The signs are oil seepage or dripping at the junction between the cylinder and crankcase, a drop in compression, and, in some cases, smoke. Confirmation is achieved with a clean engine and a road test, or with the engine opened.

Will it fit my scooter?
It covers most of the Piaggio, Gilera, and Aprilia 400, 500, and 850 range listed in the table. If you are unsure about the version or the correct thickness, send us your VIN: the check is free.

Can I install it myself?
Only if you have a torque wrench and your engine's torque values, and if you know how to re-time the distribution. This is not a job to improvise: if you do not have experience, take it to a workshop.

Is it original or third-party?
It is the original Piaggio code 830276, new and never installed.

How long does it take to arrive?
The item is available in stock and is shipped from Italy. You will receive the tracking code as soon as the package leaves.