To find motorcycle part by part number you need two things: the right number, and the right catalogue to look it up in. Most of the trouble people run into is the second one, and it is the half almost no guide covers.
What a motorcycle part number is
A number identifies exactly one item in one catalogue. It is not a description and it is not a model code, and two visually identical items can carry different numbers because of a market, a production change or an option such as anti-lock brakes.
Genuine numbers and aftermarket product numbers
These are two different systems and people mix them up constantly. A genuine number belongs to Honda, Yamaha, Suzuki or Kawasaki, and it resolves in that manufacturer’s own catalogue. A product number belongs to a tuning or accessory brand and resolves only in that brand’s catalogue, so it will never appear in a manufacturer’s diagram.
Our parts from Japan page keeps the same split, because the two are quoted from different sources. If you are working from a brand’s catalogue rather than a manufacturer’s, say so in the enquiry and the brand directory will tell you where that name sits.
| Genuine number | Brand product number | |
|---|---|---|
| Issued by | Honda, Yamaha, Suzuki or Kawasaki | The tuning, accessory or gear brand |
| Resolves in | The manufacturer’s own parts catalogue | That brand’s own catalogue only |
| We source it through | The factory parts system | The brand, in Japan |
| Send us | The number and the machine | The brand name and the number |
Where the number is found
There are three usual places: stamped or printed on the old part, listed against a position on a parts diagram, and quoted in a workshop manual. The first is the least reliable. A number on a component can be a casting mark, a supplier code or a superseded number, so treat it as a lead to confirm rather than as an answer.
How to find motorcycle part by part number on a parts diagram
A parts diagram is an exploded drawing of one assembly with a numbered position against every item. You work inwards: pick the assembly, find the position on the drawing, then read across to the number.
The conditional notes beside an entry are the part people skip, and they are where orders go wrong. Notes such as “for ABS”, “from frame no.” and “up to engine no.” narrow an entry to a range of machines, and a quantity note tells you the assembly takes more than one. Read all of them before you copy the number down.
What you can order with, and what each one pins down
Plenty of people searching for a number do not have one and are not sure what would do instead. This ranks the identifiers by how much each actually settles.
| What you have | What it pins down | What can still go wrong | Enough on its own? |
|---|---|---|---|
| Genuine number | One item in the manufacturer’s catalogue | It may have been superseded, or belong to another region’s catalogue | Yes |
| Brand product number | One item in that brand’s range | Brand catalogues are versioned, and it will not resolve in a manufacturer diagram | Yes |
| Frame number | Your exact machine, and therefore the catalogue | A single mistyped character sends us to the wrong machine | Yes, paired with a part name |
| Part name alone | A family of parts | Side, option fitment, year, market and quantity all remain open | No |
| Year, make and model | A family of machines | The same year and model is a different bike in another market | No |
| A photograph | Sometimes the item, often only the area | It cannot separate superseded versions or market variants | No, but it confirms well |
The bottom half of that table is why we ask for a frame number. There is a separate guide on identifying a part from your frame number if that is the position you are in.
When the number returns nothing
A valid number returning no result is common and it usually has one of four causes. Working through them in order saves a lot of time.
- It has been superseded. Manufacturers replace numbers after a revision or a supplier change, and the old one stops resolving.
- You have the wrong catalogue open. Regional catalogues are genuinely different documents, not translations of one another.
- The item is only listed inside a sub-assembly and has no number of its own.
- The number came off the part and was never a catalogue number to begin with.
None of those means the part cannot be got. It usually means the search needs to move to another catalogue, and our note on discontinued and back-ordered parts covers what happens next.
Japanese and Thai-market part numbers
This is the gap in every guide written for a Western reader. A Japanese-market Monkey or a Thai-market Wave does not appear in a European or North American catalogue at all, so a lookup there returns nothing however good the number is.
Yamaha describes distributing its genuine parts worldwide through a network centred on its parts centre in Japan, and the same shape applies across the Japanese makers. A part your local counter cannot find may be an ordinary item at the source.
That is the position most owners of a Honda Monkey, a Honda Dax or a Honda Wave125 are in outside Asia. The model index lists the machines we handle from this side.
Frequently asked questions
Why does a valid part number return nothing?
Most often because it has been superseded, or because the catalogue being searched is the wrong one for that machine. Sub-assembly listings are the third common cause: some items are supplied only as part of a larger group and carry no number of their own. Send us the number and the machine and we will tell you which of those it is.
Is the number stamped on the old part the right one?
Sometimes, and it is always worth reading. It can equally be a casting mark, a supplier’s own code, or a number that has since been replaced. Confirm it against a catalogue entry before ordering, or send us a photograph of the marking and let us check it.
Do you look part numbers up as a service?
We are a shop rather than a lookup service. What we do is check the supply source for genuine Honda, Yamaha, Suzuki and Kawasaki parts against a number you send, or against a part name together with your frame number, and reply by email with availability and a price. Identifying an unclear item from a photograph is part of that, and there is no charge for asking.
Sending a part number for a quotation
Send the number, the machine it is for, the destination country and how many you need. If you have no number, send the part name with your frame number instead and a photograph of the part or of where it fits. Genuine parts from Japan are normally available in about four working days when they are not backordered, and postal EMS runs about four to seven days after that.
The order policy covers payment, shipping methods and the returns position, which is worth reading before you commit. When you are ready, open a parts quote request or start one for genuine replacement parts, and the contact page reaches the same inbox.