KTM 250 Duke Chain Size and Sprocket Teeth
GarageDex's manufacturer-catalogue data shows the 2024-2026 KTM 250 Duke uses a 520 chain with 14-tooth front and 43-tooth rear sprockets from the factory. (118 links) Chain and sprocket sizing varies by year - see the table for each range.
Chain and sprocket fitment by year
| Years | Chain | Links | Front teeth | Rear teeth |
|---|---|---|---|---|
| 2024-2026 | 520 | 118 | 14 | 43 |
| 2016-2023 | - | - | 14 | 46 |
Part numbers in parentheses are the manufacturer's stock-gearing sprocket codes, useful for matching a replacement.
Chain and sprockets for the KTM 250 Duke
Match the pitch (520) and tooth counts in the table - chain and sprockets are a matched set, and a mismatched pitch will not fit the sprockets at all.
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Frequently asked
What chain size does a KTM 250 Duke use?
GarageDex's manufacturer-catalogue data shows the 2024-2026 KTM 250 Duke uses a 520 chain with 14-tooth front and 43-tooth rear sprockets from the factory. (118 links) Chain and sprocket sizing varies by year - see the table for each range.
What is the stock gearing on a KTM 250 Duke?
14-tooth front and 43-tooth rear from the factory.
What changes if I go +2 teeth on the rear sprocket?
Going up 2 teeth on the rear sprocket (or down 1-2 on the front) lowers the gearing: quicker acceleration off the line, but a lower top speed, and the chain usually needs to be 1-2 links longer to keep enough wrap on the front sprocket - a shop or the sprocket's fitment chart will confirm the exact link count for that combination. This is a generic mechanical rule, not a claim about this specific model's aftermarket options.
How many links does a KTM 250 Duke chain have?
118 links at stock length and gearing, per the manufacturer catalogue.
Other KTM models
Source: JT Sprockets - Online Catalogue, a chain and sprocket manufacturer's own application catalogue. Chain and sprocket sizing is factory-stock as JT publishes it - aftermarket gearing changes (see the FAQ) are not reflected here.