Sophomore Rider
Currently Offline
Posts: 137
Likes: 24
Joined: Jul 6, 2013 21:27:28 GMT -5
|
Post by mopojo on Nov 28, 2013 16:36:23 GMT -5
First: Happy Thanksgiving (for those who observe)!
I noticed some bothersome waves of vibration lately (from about 5,000 up to 9,000 RPM) and was wondering if a 1mm crank "lash" is tolerable.
I got the vibes when stock only between 5,500 and 6,300 RPM. After changing the belt is when the vibration waves lingered thoughout the bandwidth.
Something similar is posted in this vidia:
|
|
|
|
Post by onewheeldrive on Nov 28, 2013 22:21:18 GMT -5
I've been through 5 crankshafts and I've never really noticed any vibration issues. It was either an obnoxious knocking sound and/or the engine sounded like it was a diesel--- and there is a difference between sounds depending on which bearing it is.
I'm not sure what the spec of side-play is. There should be barely any, if at all, with the shaft in the video(which is junk). If your engine sounds fine and isn't louder, it probably isn't the crank unless it's just beginning to go out, IMO.
|
|
Sophomore Rider
Currently Offline
Posts: 137
Likes: 24
Joined: Jul 6, 2013 21:27:28 GMT -5
|
Post by mopojo on Nov 28, 2013 22:58:11 GMT -5
Thanks, man. Starting to sound like a diesel and there is knocking. Seems to rev higer st 30 mph than it did before.
|
|
Freshman Rider
Currently Offline
Posts: 94
Likes: 2
Joined: Apr 1, 2013 12:00:42 GMT -5
|
Post by Mainely Scooters on Dec 1, 2013 2:11:17 GMT -5
That is not normal. Your bearings are worn out or loose. I can see the entire bearing move when you push/pull on the crank. You will damage your motor if you continue to use it.
|
|
