Yamaha YZ450F (2020)
Chain Size & Slack
The Yamaha YZ450F (2020) uses a 520 chain with 50–60 mm slack.
Chain Size & Slack
Chain size520
Chain links114
Chain slack50–60 mmMeasured on maintenance stand (rear wheel off ground)
Chain 15-link limit242.9 mm
Drive chain slack (limit)60 mmUpper end of the adjustment range — beyond this, adjust or replace
FAQ
What chain size is on the Yamaha YZ450F (2020)?
520.
What is the specified chain slack?
50–60 mm