Zong "bounce"

BrianW · 06-10-2011, 05:04 PM

I recently re-acquired the Zong that I owned and was forced to sell last year. I posted, a few months after purchase, that there is a slight bounce to the bike. I took the wheels to a local mechanic that said they are out of round and there was no fixing them.

The bike now has ~2000 miles on it, and after not having it for a year, the bounce has gotten tremendously worse. Especially right about 40mph. I took the front wheel to a different shop and got it trued to near perfection but the bounce persists. When I spin the rear wheel on it's axle, it looks damn near perfect as is, so I would hate to spend the money truing it if it's already good.

My question is, what can be causing this bounce? I really can't enjoy the ride as is, so any ideas? Should I just bite the bullet and get the rear wheel trued, too?

FastDoc · 06-10-2011, 05:41 PM

Defective tire or tube. Don't worry you'll get it fixed. Replace the tire and tube and you'll be good to go. Also make sure the shocks are working well and not sticking. Make sure the bead sits evenly on the rim. You might get lucky removing the valve core and squeezing and pushing and bouncing and then reinflating. 8)

BrianW · 06-10-2011, 06:09 PM

Thanks, Doc, I will try this as soon as I get home. As always, I appreciate the input!

SpudRider · 06-11-2011, 01:09 AM

Welcome back to The Cult of The Zong, Brian!

I agree with FastDoc.

If the wheels are true, your bouncing wheels are probably caused by either the inner tubes, or the tires. I suspect the tire beads are not seated properly on the rim. However, I also suggest you check your wheel bearings.

Spud

katoranger · 06-11-2011, 10:11 AM

I suggest you get a matching set of Spudwheels.

sallzy · 06-11-2011, 11:24 AM

Ok I'll bite, what are spud wheels?

katoranger · 06-11-2011, 12:20 PM

18/21" wheels laced up by Spud to fit the zongs.

06-10-2011, 05:04 PM	#1
BrianW Join Date: Feb 2008 Location: Wheeling, WV native currently living In Natchitoches, LA Posts: 297	Zong "bounce" I recently re-acquired the Zong that I owned and was forced to sell last year. I posted, a few months after purchase, that there is a slight bounce to the bike. I took the wheels to a local mechanic that said they are out of round and there was no fixing them. The bike now has ~2000 miles on it, and after not having it for a year, the bounce has gotten tremendously worse. Especially right about 40mph. I took the front wheel to a different shop and got it trued to near perfection but the bounce persists. When I spin the rear wheel on it's axle, it looks damn near perfect as is, so I would hate to spend the money truing it if it's already good. My question is, what can be causing this bounce? I really can't enjoy the ride as is, so any ideas? Should I just bite the bullet and get the rear wheel trued, too?
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06-10-2011, 05:41 PM	#2
FastDoc Join Date: Mar 2009 Location: Southeastern Washington desert Posts: 14,761	Defective tire or tube. Don't worry you'll get it fixed. Replace the tire and tube and you'll be good to go. Also make sure the shocks are working well and not sticking. Make sure the bead sits evenly on the rim. You might get lucky removing the valve core and squeezing and pushing and bouncing and then reinflating. 8) __________________ Happy to serve.
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06-11-2011, 01:09 AM	#4
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	Welcome back to The Cult of The Zong, Brian! I agree with FastDoc. If the wheels are true, your bouncing wheels are probably caused by either the inner tubes, or the tires. I suspect the tire beads are not seated properly on the rim. However, I also suggest you check your wheel bearings. Spud __________________ 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
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06-10-2011, 06:09 PM	#3
BrianW Join Date: Feb 2008 Location: Wheeling, WV native currently living In Natchitoches, LA Posts: 297	Thanks, Doc, I will try this as soon as I get home. As always, I appreciate the input!
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06-11-2011, 10:11 AM	#5
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	I suggest you get a matching set of Spudwheels.
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06-11-2011, 11:24 AM	#6
sallzy Join Date: Aug 2010 Location: Hyde park vermont Posts: 61	Ok I'll bite, what are spud wheels?
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06-11-2011, 12:20 PM	#7
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	18/21" wheels laced up by Spud to fit the zongs.
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