Rear Sprocket for Beta RR 300: Adjustable Type
This rear sprocket is built for the Beta RR 300 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 adjustable type programme stable once it moves from first order to repeat order.
Most buyers come to us after something went wrong: reorders that did not match the approved sample, or premature wear on the first batch. Both are avoidable when the specification is written down before bulk and the approved sample is kept as the reference.
Specification
| Part | Rear Sprocket |
|---|---|
| Fitment | Beta RR 300 |
| Version | Adjustable Type |
| Base material | Stainless Steel |
| Typical use | Track Days |
| MOQ | 200 pieces per specification |
| Sampling | 7 working days, 3 days per revision |
| Bulk lead time | 25-45 days after approval |
| Compliance | SAE J431 |
What decides whether it lasts
- Material — Stainless Steel 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 Beta RR 300 mounting, not on a catalogue drawing.
- Finish — anodising 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
- assembly line testing
- surface grinding
- sintering
- CNC machining
- shot blasting
- injection moulding
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 adjustable type build is the one most often ordered for track days. Riders also fit it for mining sites, daily commuting, delivery fleets, ride-hailing fleets.
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
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.
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 200 pieces per line.
What testing is included?
Standard lots ship with dimensional and hardness reports. SAE J431 documentation is issued with the shipment when your market requires it.
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 specification you are working to and we will confirm what we can match, what we would change and why.
