Brake Master Cylinder for QJMotor SRK 400: Racing Spec

Brake Master Cylinder for QJMotor SRK 400: Racing Spec

This brake master cylinder is built for the QJMotor SRK 400 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 racing spec programme stable once it moves from first order to repeat order.

Most buyers come to us after something went wrong: a specification nobody had written down, 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

What decides whether it lasts

• Material — Ceramic Composite 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 QJMotor SRK 400 mounting, not on a catalogue drawing.
• Finish — powder coating 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
• die casting
• laser cutting
• assembly line testing
• ultrasonic cleaning
• gravity casting

Fitment notes

Confirm the fitment against the VIN or the frame number before ordering; two model years often share a name and not a part.

Where it is used

The racing spec build is the one most often ordered for passenger transport. Riders also fit it for urban courier work, security patrols, rental fleets, heavy load hauling.

Ordering

1. Confirm the model year and frame number before ordering.
2. Approve a sample made from the actual bulk material.
3. Fix the packing and marking at quotation stage.
4. Book inspection before the balance payment, not after it.

Questions buyers ask

Do you handle mixed containers?

Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 500 pieces per line.

How long does sampling take?

Samples leave the factory in 10 working days, and each revision round adds about 5 days once you have seen the first piece.

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 the specification be held on file?

Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the SAE J431-compliant build instead of a fresh interpretation.

Tell us the model, the fitment and the quantity and we will hold a production slot for you.