Author Topic: Cb400four f2  (Read 858 times)

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Offline Keith neasham

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Cb400four f2
« on: September 20, 2016, 05:47:20 AM »
Hi guys, anyone out there able to help? my  1977 400 four F2 is making a whiney screeching noise when its under load, not there on overrun  as soon as the clutch is let out you begin to her it, more noticeable in lowest gears at slower speeds, will inspect clutch and replace if necessary but wondered if anyone else had this kind of problem in case it's a bearing elsewhere?

Offline thirsty 1

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Re: Cb400four f2
« Reply #1 on: September 20, 2016, 10:13:06 PM »
Primary chain. it's normal. Please rev engine to 9000 rpm...continue
73' CL125, 75' CB400F, 16' KTM 1190R, 05' KTM 525EXC

75' CB400F  -  http://forums.sohc4.net/index.php?topic=127295.0

My 79 CB750F for fun   ----   http://www.dotheton.com/forum/index.php?topic=19923.0

Offline DaveBarbier

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Re: Cb400four f2
« Reply #2 on: September 21, 2016, 04:24:27 AM »
Whiny screeching noise doesn't sound normal to me. Post a video of the sound...tape your phone to your leg or something creative, haha.