Yamaha YFM90 R Raptor Chain Size and Sprocket Teeth
GarageDex's manufacturer-catalogue data shows the 2009-2018 Yamaha YFM90 R Raptor uses a chain with 13-tooth front and 38-tooth rear sprockets from the factory.
Chain and sprocket fitment by year
| Years | Chain | Links | Front teeth | Rear teeth |
|---|---|---|---|---|
| 2009-2018 | - | - | 13 | 38 |
Part numbers in parentheses are the manufacturer's stock-gearing sprocket codes, useful for matching a replacement.
Chain and sprockets for the Yamaha YFM90 R Raptor
Match the pitch (size) and tooth counts in the table - chain and sprockets are a matched set, and a mismatched pitch will not fit the sprockets at all.
As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
Frequently asked
What chain size does a Yamaha YFM90 R Raptor use?
GarageDex's manufacturer-catalogue data shows the 2009-2018 Yamaha YFM90 R Raptor uses a chain with 13-tooth front and 38-tooth rear sprockets from the factory.
What is the stock gearing on a Yamaha YFM90 R Raptor?
13-tooth front and 38-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 Yamaha YFM90 R Raptor chain have?
Link count is not published for this model - a chain shop can size one from the old chain or the swingarm.
Same bike, other specs: Yamaha YFM90R, Raptor battery size.
Other Yamaha 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.