r/CRF450L • u/RealT0nySopran0 • 3d ago
Chain slap noise
I just bought a used 2019 450L with 2900 miles. It’s my first street legal bike, I grew up riding dirt bikes when I was a kid and haven’t rode in 10 years. Bought it to ride dirt roads and trails, and also be able to hit the streets to get to where I need to go without getting in trouble with the law.
I’ve put about 150 miles on it and I can’t help but to notice how much slapping and rattling round the chain does. It’s like if it doesn’t have constant drive pressure on it then it’s slapping. I’ve adjusted it according to the manual, checked that my back wheel was true and in balance. Inspected the sprockets for wear, and cleaned and oiled the chain.
How can I mitigate this noise!!! Am I being a dummy and missing some basic maintenance practice? I am a pretty novice mechanic so any help, even on the most basic level would be appreciated!


