KTM 450 SXF engine noise linked to clutch engagement (with video)

mark_swart
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mark_swart
I have a 165 hour 2017.5 KTM 450SXF. I bought it at 140 hours. It has always made some noise (almost like a chatter) when the clutch is let out, and it goes away when the clutch is pulled in. It has always done this and it isn't getting worse that I can tell, but I just wondered if it is normal? Also, piston and timing chain replaced at 140, valves in spec. I have replaced clutch rubber bumpers, basket bearing, and all of the plates measured within spec.
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Leeham
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Leeham 1/15/2021 10:48pm
1/15/2021 10:48pm
My bikes have always were louder with clutch lever out. My 17 KTM 250 SX, my 19 CRF250R, my brothers 19 YZ250F, and my brand new 21 YZ250F. All of them had the same noise as your KTM in the video.
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MX915
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MX915 1/16/2021 1:10pm
1/16/2021 1:10pm Edited Date/Time 1/16/2021 1:11pm
Normal on a KTM 4 stroke, IMO. I’ve had several. All sounded similar with and without the clutch pulled in.
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kNewc
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kNewc 5/5/2023 3:51pm
5/5/2023 3:51pm Edited Date/Time 5/5/2023 4:00pm
Leeham wrote:
My bikes have always were louder with clutch lever out. My 17 KTM 250 SX, my 19 CRF250R, my brothers 19 YZ250F, and my brand new...
My bikes have always were louder with clutch lever out. My 17 KTM 250 SX, my 19 CRF250R, my brothers 19 YZ250F, and my brand new 21 YZ250F. All of them had the same noise as your KTM in the video.

For some reason I never noticed till today but my '21 KX250 does this too. Not meaning to revive an old thread but the video and information was useful for my worried ass.

CSAR FE
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CSAR FE 5/6/2023 10:20am
5/6/2023 10:20am Edited Date/Time 5/6/2023 10:20am

If the dampers are worn out, it makes it louder than normal. Otherwise, pretty normal fare.

ZinAZ
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ZinAZ 5/8/2023 3:36pm
5/8/2023 3:36pm

had a 16, 17, and current 22 450sxf...all do this...is normal

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