Air Box for Dayun 150: Upgraded Version
This air box is built for the Dayun 150 and supplied to a written specification, so the part that comes off the line in the next order matches the one you approved. Fitment, base material and finish are fixed before sampling starts — that is what keeps the upgraded version programme stable once it moves from first order to repeat order.
Most buyers come to us after something went wrong: packing that arrived crushed at the port, or a specification nobody had written down. Both are avoidable when the specification is written down before bulk and the approved sample is kept as the reference.
Specification
| Part | Air Box |
|---|---|
| Fitment | Dayun 150 |
| Version | Upgraded Version |
| Base material | Brass |
| Typical use | Mountain Roads |
| MOQ | 200 pieces per specification |
| Sampling | 7 working days, 5 days per revision |
| Bulk lead time | 20-45 days after approval |
| Compliance | ISO 9001 |
What decides whether it lasts
- Material — Brass is the base; treat any substitution as a new approval.
- Hardness and heat treatment — recorded per lot, not per batch of paperwork.
- Fitment tolerance — checked on the actual Dayun 150 mounting, not on a catalogue drawing.
- Finish — zinc plating holds up where the machine sees salt, mud and daily washing.
- Packing — individual packing plus inner cartons sized for the workshop bench.
Processes used on this line
- heat treatment
- rubber vulcanisation
- CNC machining
- surface grinding
- assembly line testing
- robot welding
Fitment notes
Check whether the mounting points on your market version match the catalogue drawing — regional variants are the usual cause of a wrong first order.
Where it is used
The upgraded version build is the one most often ordered for mountain roads. Riders also fit it for mining sites, passenger transport, rural transport, construction sites.
Ordering
- Confirm the model year and frame number before ordering.
- Approve a sample made from the actual bulk material.
- Fix the packing and marking at quotation stage.
- Book inspection before the balance payment, not after it.
Questions buyers ask
What is the minimum order quantity?
The standard MOQ is 200 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the ISO 9001-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.
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 200 pieces per line.
Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.
