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2001 520SX clutch noise

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I just bought a 01 520SX when in neutral I hear a thumping or a knocking, when the clutch is pulled in the noise goes away. The clutch feels strong and the bike runs great. Any ideas? Thanks.......

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THE NOISE YOU HEAR IS THE CLUTCH PUSHROD SPINNING IN THE HOLLOW INPUT SHAFT, WHEN YOU PULL IN THE CLUTCH THE ROD STOPS SPINNING AND PRESSURE IS APPLIED TO THE PUSHROD, NOT A BIG CONCEARN, JUST A LOUD KNOCKING NOISE, MINE DOES IT TO, IT MAKES IT LOUDER IF YOU HAVE A SKIDPLATE BECAUSE THE NOISE BOUNCES BACK UP TO YOU EARS, HOPE THIS HELPS

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Thanks guys makes me feel much better. It's used so you never know, the bike is awesome. Super clean for 2800.........

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I had almost exactly the same thing, but on a 2002 520exc. When I fetched it from a service, I was told that a nut securing a gear or something behind the clutch was loose. It now sounds very quiet...

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