50cc bad vibration

mark123 · 05-21-2013, 04:25 PM

I HAVE A 50cc gio atv and it vibrates a lot at higher rpm, so much that it really bothers your feet on the footrests. Where do I start looking for problems.

FastDoc · 05-21-2013, 04:36 PM

Check the motor mounts first.

Listen to more Beach Boys next if that does not help.

Good Vibrations counter Bad Vibrations.

SpudRider · 05-22-2013, 01:44 AM

Indeed, the motor mount bolts are frequently loose on some of the Chinese bikes.

mark123 · 05-22-2013, 05:29 AM

I will check that, but was thinking more along the line of the flywheel, being out of balance, do they have little weigts welded on them for balancing, could one have broken off? Someone told me that as the transmission/clutch wears the dust collects and migt even cause vibration.

Weldangrind · 05-22-2013, 10:30 AM

I don't think that you'll find weight added to the flywheel, only material removed. These are relatively smooth little motors, but they buzz at higher rpm. X2 on the motor mounts, along with every fastener on the quad. Blue Loctite is your friend.

FastDoc · 05-22-2013, 11:14 AM

I wonder if the 'weights' you are referring to aren't magnets? If that is the case and one was missing I don't think the motor would run.

SpudRider · 05-22-2013, 01:18 PM

Quote:

Originally Posted by mark123

I will check that, but was thinking more along the line of the flywheel, being out of balance, do they have little weigts welded on them for balancing, could one have broken off? Someone told me that as the transmission/clutch wears the dust collects and migt even cause vibration.

I've never heard of a flywheel coming apart. Similarly, normal wear of the drive chain and clutch will not cause vibration.

As Weldangrind suggested, you should check the motor mounts along with every other fastener on the quad.

mark123 · 07-02-2013, 05:27 AM

I check all mounts and they are tight, no welds broken etc.. any other ideas, the faster it goes the worse it gets, the vibration through your feet gets to the point that you have to slow down because it gets start to hurt.

SpudRider · 07-02-2013, 01:22 PM

I strongly suggest you don't ride that bike again until you discover the problem; it's dangerous. One member of these forums has the frame crack on him. If the vibrations are coming from the engine, it could fail you at the worst possible moment.

05-21-2013, 04:25 PM	#1
mark123 Join Date: Nov 2009 Posts: 10	50cc bad vibration I HAVE A 50cc gio atv and it vibrates a lot at higher rpm, so much that it really bothers your feet on the footrests. Where do I start looking for problems.
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05-21-2013, 04:36 PM	#2
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	Check the motor mounts first. Listen to more Beach Boys next if that does not help. Good Vibrations counter Bad Vibrations. __________________ Happy to serve.
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05-22-2013, 01:44 AM	#3
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	Indeed, the motor mount bolts are frequently loose on some of the Chinese bikes. __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
	0

05-22-2013, 10:30 AM	#5
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I don't think that you'll find weight added to the flywheel, only material removed. These are relatively smooth little motors, but they buzz at higher rpm. X2 on the motor mounts, along with every fastener on the quad. Blue Loctite is your friend. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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05-22-2013, 11:14 AM	#6
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	I wonder if the 'weights' you are referring to aren't magnets? If that is the case and one was missing I don't think the motor would run. __________________ Happy to serve.
	0

05-22-2013, 05:29 AM	#4
mark123 Join Date: Nov 2009 Posts: 10	I will check that, but was thinking more along the line of the flywheel, being out of balance, do they have little weigts welded on them for balancing, could one have broken off? Someone told me that as the transmission/clutch wears the dust collects and migt even cause vibration.
	0

07-02-2013, 05:27 AM	#8
mark123 Join Date: Nov 2009 Posts: 10	I check all mounts and they are tight, no welds broken etc.. any other ideas, the faster it goes the worse it gets, the vibration through your feet gets to the point that you have to slow down because it gets start to hurt.
	0

07-02-2013, 01:22 PM	#9
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	I strongly suggest you don't ride that bike again until you discover the problem; it's dangerous. One member of these forums has the frame crack on him. If the vibrations are coming from the engine, it could fail you at the worst possible moment. __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
	0