SP 400 4 stroke engine knocks at idle

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08-17-2003, 03:30 AM

DANO38

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SP 400 4 stroke engine knocks at idle

Has anyone had problems with their SP 400 knocking at idle??? seems like it might be worse hot. It almost sounds
kind of like a loud piston slap but I'm not sure??? Are their any problems to look outfor on the 400 4 strokes???
It has about 1200 miles on it and is an '01. Thanks!!!

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08-17-2003, 03:40 AM

ftwflh

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Don't let the hp numbers fool you. Its all in how you get it to the ground. Clutching clutching clutching!

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SP 400 4 stroke engine knocks at idle

Check the buttons in your primary clutch

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08-17-2003, 03:43 AM

DANO38

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SP 400 4 stroke engine knocks at idle

what do you mean the buttons? are they like a nylon or blastic pad on the drive clutch?

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08-17-2003, 11:11 AM

ftwflh

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Don't let the hp numbers fool you. Its all in how you get it to the ground. Clutching clutching clutching!

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SP 400 4 stroke engine knocks at idle

They are round buttons that the two halves slide on.If you dont have the tool to do it you can take it off and take it to a shop.To check them I just take the cover off,start it and listen or feel thee primary clutch.

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