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Motorcycle Racing Helmets Specification Example for Passenger Cars: Long Life Version

Source:Mechanical Coupling / Time:2026-09-18

Motorcycle Racing Helmets Specification Example for Passenger Cars: Long Life Version

This is a worked specification for motorcycle racing helmets in a long life version programme. It is the document we would send a buyer who asks what exactly they are getting: the material, the dimensions that are actually controlled, the finish, and the checks that happen before anything is packed.

The long life version version exists because the duty cycle on passenger cars is not the same as on a showroom vehicle. Where the two are specified identically, something fails later — usually a fitment that looked right on paper and failed on the bench.

Motorcycle Racing Helmets

Example specification

ItemMotorcycle Racing Helmets
ApplicationPassenger Cars
VersionLong Life Version
Base materialKevlar Composite
Controlled dimensions4 key dimensions, recorded per lot
Tolerance band±0.05 mm
Finishpowder coated
MOQ3,000 pieces per specification
Sampling14 working days, 3 days per revision
ComplianceE-mark

How the example is built up

  1. Start from the duty cycle, not from the catalogue photograph.
  2. Fix the base material in writing — Kevlar Composite, in this example.
  3. List the dimensions that are actually controlled and the tolerance on each.
  4. Name the finish and what it has to survive.
  5. State the inspection level and who pays when a lot fails.

Motorcycle Racing Helmets example

Processes involved

  • gravity casting
  • ultrasonic cleaning
  • heat treatment
  • assembly line testing
  • precision stamping
  • electroplating

Where this example applies

Programmes that run long life version most often specify this build for passenger cars. Related applications include municipal fleets, assembly programmes, emergency vehicles, boat trailers, three-wheelers.

Checks before packing

  • Dimensional report against the approved drawing.
  • AQL 2.5 sampling on the finished lot.
  • Finish inspection under agreed lighting.
  • Carton drop test on the first lot of a new packing specification.

Questions buyers ask

How is packing specified?

Individual packing, inner box quantity and carton marking are confirmed at quotation stage so the cartons arrive ready for your warehouse.

Can the specification be held on file?

Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the E-mark-compliant build instead of a fresh interpretation.

What happens if a lot fails inspection?

The lot is re-inspected against the golden sample, and replacement pieces ship on the next available booking at our cost.

Can you match an existing sample?

Send a sample and we will reverse-engineer the specification, then produce a counter sample for approval before any bulk starts.

Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.

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