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 in large 400, 500 and 850 cc 4-stroke Piaggio Group engines: 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 crankcase and determines the engine's squish: for this reason, it comes 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 fitted during production
• Declared thickness 0.6 mm – for base gaskets, thickness is the key data, 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 every time the cylinder is removed – a gasket that has already been compressed cannot be reinstalled
• 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 the summary by brand. If your vehicle is not listed, or if you are unsure of the thickness to install, contact us before ordering.

Recommended products

• Cylinder head gasket – to be changed during the same operation, the engine is already open
• Oil seals and engine gasket set – for a proper overhaul
• Piston rings and piston – if you are rebuilding the thermal unit
• Spark plug and oil filter – the inexpensive spare parts not to forget during reassembly

Who is it perfect for?

It is needed by anyone opening the engine of a Piaggio Group maxi-scooter or motorcycle (400-500-850 cc): for thermal unit rebuilding, piston and ring replacement, or repair of an oil leak at the cylinder base. It's the classic inexpensive spare part that cannot be skipped: reinstalling the cylinder without a new gasket, or with a different thickness than specified, means reopening the engine shortly thereafter. It's also the part that workshops keep on the shelf, because a single code covers most Piaggio, Gilera, and Aprilia maxi-scooters in circulation.

Frequently Asked Questions

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

Can I reuse the old one?
No, it is single-use. Tightening permanently deforms it: reassembling it will almost certainly lead to a leak in a short time. It's the cheapest part of the entire overhaul.

How do I know if the base gasket has failed?
Signs include oil seepage or dripping at the junction between the cylinder and crankcase, a drop in compression, and in some cases, smoke. Confirmation comes with a clean engine and a road test, or with the engine disassembled.

Is it suitable for my scooter?
It covers most of the 400, 500, and 850 range from Piaggio, Gilera, and Aprilia listed in the table. If you are unsure of the correct version or thickness, send us your frame number: verification 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 time the distribution. This is not an operation to improvise: if you lack experience, take it to a workshop.

Is it original or aftermarket?
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 shipped from Italy. You will receive a tracking code as soon as the package departs.