2014 RMZ450 Vibrating Footpegs

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5/1/2018 6:36 PM
Edited Date/Time: 5/1/2018 6:46 PM

Hi, hoping you guys can help me out.

Went on the first ride post winter yesterday, and noticed a lot of vibration in the footpegs. Enough where I noticed it and was worried. I know a certain amount of vibration is normal in these bikes because of the missing balance shaft, but I didn't notice in the 15 or so hours I put on last season after buying it mid-summer. Also twice during the ride i noticed a slapping noise when i did a slow speed donut to turn around. No loss in power or performance that I could feel.

I pulled the screen under the shifter:
Photo
Photo

This is the first time I've pulled it and I have no idea if the other guy ever cleaned it, so I'm not sure if that's normal. I didn't see any brass or copper flakes in the paper filter or the screen. I checked my motor mounts and they're all tight. Now I'm paranoid about it blowing up. I don't know how many hours are on it, but my guess is around 120, and the last dude claimed he did a top end around 55.

Anyone know what else could be causing this? I'm a decent mechanic, but I don't want to split the cases. Local shop quoted me $1500 for a full top and bottom rebuild out the door, but not sure if that's necessary.

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5/1/2018 7:26 PM

At 120 hours it should be time for a rebuild of the lower end.

Paw Paw

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5/1/2018 8:16 PM

Paw Paw 271 wrote:

At 120 hours it should be time for a rebuild of the lower end.

Paw Paw

Thanks for the reply. that's probably what I'll end up doing just for peace of mind, but could anything else be causing it? Cam chain tension or valves? I'm pretty new to 4 strokes

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5/1/2018 8:30 PM

Check the motor mounts too. But definitely time for a rebuild

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2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

80% of the time it works every time
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5/2/2018 3:37 AM

If youre a decent mechanic, do the rebuild yourself. If your mounts are tight id go ahead and pull the cylinder off and take a look at whats going on. For all you know the piston might have some play at the wrist pin and thats all it needs.

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5/2/2018 7:49 AM

Thanks for the help. The mounts are tight, I started it again last night and still getting the vibration and a slight clicking from the engine. Only ran it for a minute since I'm paranoid. I might pull the cylinder to check the play in the piston/rod, but I'm gonna have it rebuilt by a pro since I'm not confident about splitting cases. It needs it, and this way I'll know the maintenance history post rebuild. Bummed about the $1600 though.

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