Maintenance & Technical > KX250 / KX125

kx250 knocking noise

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gowen:
For the knocking noise, is it constant while the bike is idling? When you hit the throttle? When the RPMs are coming down? While iding, slowly give it gas and see if the knock is constant with the rpms.

kx250-818:
Yup the noise stays consistant with the idle and if i trottle it up it goes away but as the rpms are coming back down it starts knocking again. So today im getting ready to take the top end off and take a look inside hopoefully i figure out what its from.

Hillclimb#42:
Check clutch basket. We have a ktm 85 that we were sure had piston slapping. Made alot of rattling at idle. The rivots that mount the plate to the back of basket was factory rivots which got sloppy. I think kaws are the same. Hinson basket comes with allen bolts, and cured our rattlin' at idle issue.

kx250-818:
hey guys so so i rebuilt the head on my 250 my first time doing it took acouple of hours but i did it. My old piston had significant side to side movement but no up and down which was the good part. I changed the piston the noise has reduced a lot and so did the vibration, But reading other peoples messages i guess it normal for some kx's to vibrate. anyway thank to those who responded to my post greatly appreciated.  :-D

Hillclimb#42:
C'mon Wizzy, he means top end. And he also said he just started riding. We all have posted plenty of threads without proof reading. I think Corky rides suzuki's.

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