sound like a train when accelerating

marquet · 05-16-2016, 06:28 AM

I have had this noise for quite a while now. The bike ( GZ 250 ) is now 16 years old, I have just renewed the cylinder and piston, valve springs etc and clutch. I was hoping that this would clear it up, the noise is not there on de acceleration, the engine is running sweet. Any help would be appreciated. The noise seems to be coming from the crankcase, or the drive chain and is accompanied with a slight jerking motion,any help ?

Water Warrior 2 · 05-17-2016, 06:04 PM

Sounds like you may be due for a new chain and sprockets. Give them a good inspection. If they look worn and you don't know how many miles are on them you may need to replace them. Pics would help us help you.

5th_bike · 05-18-2016, 11:49 PM

...or a worn out rubber inside the rear wheel.

marquet · 05-19-2016, 04:55 AM

Thank's. Water warrior, free wheeled down to my mates yesterday and still had the noise and chug a chug sensation, think you may be right, will send pic's and inspect. Also thank's 5th Bike. Have replaced all components in the rear wheel,as I also suspected that.

05-16-2016, 06:28 AM	#1
marquet Junior Member Join Date: Feb 2016 Posts: 2	sound like a train when accelerating I have had this noise for quite a while now. The bike ( GZ 250 ) is now 16 years old, I have just renewed the cylinder and piston, valve springs etc and clutch. I was hoping that this would clear it up, the noise is not there on de acceleration, the engine is running sweet. Any help would be appreciated. The noise seems to be coming from the crankcase, or the drive chain and is accompanied with a slight jerking motion,any help ? Login or Register to Remove Ads Last edited by marquet; 05-17-2016 at 09:08 AM. Reason: No response to first part of question !
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05-18-2016, 11:49 PM	#3
5th_bike Senior Member Join Date: Oct 2007 Location: HoCo, Maryland Posts: 1,349	...or a worn out rubber inside the rear wheel. __________________ 2005 "Saturn Black", stock + tach Login or Register to Remove Ads
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05-17-2016, 06:04 PM	#2
Water Warrior 2 Senior Member Join Date: Dec 2006 Location: Squamish B.C Canada Posts: 11,409	Sounds like you may be due for a new chain and sprockets. Give them a good inspection. If they look worn and you don't know how many miles are on them you may need to replace them. Pics would help us help you.
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05-19-2016, 04:55 AM	#4
marquet Junior Member Join Date: Feb 2016 Posts: 2	Thank's. Water warrior, free wheeled down to my mates yesterday and still had the noise and chug a chug sensation, think you may be right, will send pic's and inspect. Also thank's 5th Bike. Have replaced all components in the rear wheel,as I also suspected that.
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