bad vibeacions

msRandi · 05-30-2007, 10:22 PM

on the newest motor. the OHC lifan I put in Rachel's Viva. when the motor is under a load there is growl like a bad bearing, I have pulled the rear wheel off and checked the wheel bearings, checked chain and sprockets, wheel hub and pulled the cluch apart. I can't find the source. any better ideas?

ob1 · 05-30-2007, 10:45 PM

Double check the chain and sprockets. Sounds like a stretched chain.

red2003 · 05-31-2007, 07:58 AM

Quote:

Originally Posted by ob1

Double check the chain and sprockets. Sounds like a stretched chain.

That would be my guess too.

frostbite · 05-31-2007, 12:33 PM

Quote:

on the newest motor. the OHC lifan I put in Rachel's Viva. when the motor is under a load there is growl like a bad bearing, I have pulled the rear wheel off and checked the wheel bearings, checked chain and sprockets, wheel hub and pulled the cluch apart. I can't find the source. any better ideas?

It sounds like the same thing I encountered. I swapped out the chain/sprockets - no change. Turns out it was the transmission. New engine (replaced under warrany) cured it. Under idle no vibration whatsoever, however, once warmed up under load it was vibration city. It got so bad I blew 1 headlight, 1 tailight, 1 dash light.

katoranger · 06-02-2007, 09:19 PM

Quote:

Originally Posted by frostbite

Quote:

on the newest motor. the OHC lifan I put in Rachel's Viva. when the motor is under a load there is growl like a bad bearing, I have pulled the rear wheel off and checked the wheel bearings, checked chain and sprockets, wheel hub and pulled the cluch apart. I can't find the source. any better ideas?

It sounds like the same thing I encountered. I swapped out the chain/sprockets - no change. Turns out it was the transmission. New engine (replaced under warrany) cured it. Under idle no vibration whatsoever, however, once warmed up under load it was vibration city. It got so bad I blew 1 headlight, 1 tailight, 1 dash light.

Mine vibrates and has a growl when I let off the gas. Vibration have gotton worse. Only at 205km. I have blow the headlight already.

Going to call AL and ask them.

Allen

Akonababe · 06-02-2007, 11:36 PM

Frostbite, you were right the transmission is blown. Spoke with longevity and waiting on his reply for the replacement. Only 2 weeks and the transmission gone. Sounds like they are going to honor the warranty but we shall see.

red2003 · 06-03-2007, 08:34 AM

Holy smokes. That's horrible news. Especially if others are having issues. Frosty, did you get to take the tranny apart to diagnos the problem or did it get shipped back?? This seems like a Lifan problem so far. I'd be curious to know what's up in there and a little nervous about losing the tranny at highway speeds. OB1, what do you think. I have no experience with a motorcycle tranny.

ob1 · 06-03-2007, 09:34 AM

Transmissions are not my forte.

I can say this though, gearing these 200's for max speed will definitely increase the load on the whole engine. Add hilly terrain for more stress. I'm guessing most here {myself included} are no longer svelte, more stress.

I thrash my 163FML2 engine whenever I ride it, but the Honda chassis is much lighter, and my gearing is 15/48, and I have had no problems with the motor at all.

But still, the tranny shouldnt fail so soon after installing the new engine.

My guess is that some excess casting debris may be floating around in some of the engines, galling bearings and causing failures.

frostbite · 06-03-2007, 01:21 PM

Quote:

Holy smokes. That's horrible news. Especially if others are having issues. Frosty, did you get to take the tranny apart to diagnos the problem or did it get shipped back??

I meant to take it apart before returning it but I never found the time.

katoranger · 06-03-2007, 07:23 PM

This is not encouraging, but I haven't looked close enough to determine if mine is transmission related. Thanks, Allen

Beerslayer · 06-04-2007, 02:19 AM

This is ugly. My GY 200 has added a pretty nasty vibration when it is warmed up. I was wondering if it was falling apart. Think I will drop the oil and see what's floating around in there.

Akonababe · 06-04-2007, 01:01 PM

We had notthing floating around in the oil when we changed it, but the transmission was blown.

allfunmotorsport · 06-04-2007, 01:56 PM

All the real nasty stuff gets stuck to the permanent magnets in the flywheel on these bikes i find when you drop the oil then pull the stator cover off and that's where you'll find debris

ob1 · 06-04-2007, 05:26 PM

Cast aluminum cases.... aluminum is nonferrous.

Regardless, without anyone actually ripping one down and finding the problem, we are all guessing.

msRandi · 06-05-2007, 12:37 AM

I'm trying to keep the motor so I can do a tair down. hopefuly we will find out.

05-30-2007, 10:22 PM	#1
msRandi Join Date: Jan 2007 Location: Douglas, AZ Posts: 220	bad vibeacions on the newest motor. the OHC lifan I put in Rachel's Viva. when the motor is under a load there is growl like a bad bearing, I have pulled the rear wheel off and checked the wheel bearings, checked chain and sprockets, wheel hub and pulled the cluch apart. I can't find the source. any better ideas? __________________ Love from the Arizona High Desert
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06-02-2007, 11:36 PM	#6
Akonababe Join Date: Dec 2006 Location: Douglas, Arizona Posts: 154	Frostbite, you were right the transmission is blown. Spoke with longevity and waiting on his reply for the replacement. Only 2 weeks and the transmission gone. Sounds like they are going to honor the warranty but we shall see. __________________ Ride hard and have FUN!!!!
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06-03-2007, 08:34 AM	#7
red2003 Join Date: Jan 2007 Location: Northern Vermont, USA Posts: 1,240	Holy smokes. That's horrible news. Especially if others are having issues. Frosty, did you get to take the tranny apart to diagnos the problem or did it get shipped back?? This seems like a Lifan problem so far. I'd be curious to know what's up in there and a little nervous about losing the tranny at highway speeds. OB1, what do you think. I have no experience with a motorcycle tranny. __________________ First Chinabike: 2006 Roketa RSX200E Current Chinabikes: 2023 Titan DLX & 2022 Lifan KP Mini w/ 210cc BRT kit, 22 RWHP!
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06-03-2007, 07:23 PM	#10
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	This is not encouraging, but I haven't looked close enough to determine if mine is transmission related. Thanks, Allen __________________ You meet the nicest people on a Honda Clone.
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06-04-2007, 01:01 PM	#12
Akonababe Join Date: Dec 2006 Location: Douglas, Arizona Posts: 154	We had notthing floating around in the oil when we changed it, but the transmission was blown. __________________ Ride hard and have FUN!!!!
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05-30-2007, 10:45 PM	#2
ob1 Join Date: Jul 2006 Posts: 499	Double check the chain and sprockets. Sounds like a stretched chain.
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06-03-2007, 09:34 AM	#8
ob1 Join Date: Jul 2006 Posts: 499	Transmissions are not my forte. I can say this though, gearing these 200's for max speed will definitely increase the load on the whole engine. Add hilly terrain for more stress. I'm guessing most here {myself included} are no longer svelte, more stress. I thrash my 163FML2 engine whenever I ride it, but the Honda chassis is much lighter, and my gearing is 15/48, and I have had no problems with the motor at all. But still, the tranny shouldnt fail so soon after installing the new engine. My guess is that some excess casting debris may be floating around in some of the engines, galling bearings and causing failures.
	0

06-04-2007, 02:19 AM	#11
Beerslayer Join Date: Jun 2006 Posts: 188	This is ugly. My GY 200 has added a pretty nasty vibration when it is warmed up. I was wondering if it was falling apart. Think I will drop the oil and see what's floating around in there.
	0

06-04-2007, 01:56 PM	#13
allfunmotorsport Join Date: Apr 2007 Posts: 159	All the real nasty stuff gets stuck to the permanent magnets in the flywheel on these bikes i find when you drop the oil then pull the stator cover off and that's where you'll find debris
	0

06-04-2007, 05:26 PM	#14
ob1 Join Date: Jul 2006 Posts: 499	Cast aluminum cases.... aluminum is nonferrous. Regardless, without anyone actually ripping one down and finding the problem, we are all guessing.
	0

06-05-2007, 12:37 AM	#15
msRandi Join Date: Jan 2007 Location: Douglas, AZ Posts: 220	I'm trying to keep the motor so I can do a tair down. hopefuly we will find out. __________________ Love from the Arizona High Desert
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