LF200gy-5 back brake calliper seizing

layneroxxx · 09-08-2008, 06:05 PM

Anyone have any ideas what would be making my lf200gy-5's rear brake calliper freeze or lock up?

It's been happening every once in a while, especially after it has been sitting outside for 8 hours in the sun and then locks up on my way home. Then it just releases after I let it sit and then struggle to get it in the garage.

Thanks for any input.

Jaime · 09-08-2008, 06:13 PM

I think this might help, check it out.

http://www.hooperimports.com/images/...rear_brake.JPG

Dragon · 09-08-2008, 09:29 PM

I'm glad mine is drum brake. Don't have to worry about that.

czowner · 09-09-2008, 03:21 AM

I had to cut a few threads off the rod to get the adjustment correct.

Jonathan.

warrior91 · 09-09-2008, 07:57 PM

Removing mystery shipping fluid in brake is good start.

I bled ,rode,bled,rode...untill brakes faded... (It seemed 15 min of riding was all it took to heat the crappy fluid to the point of siezure.)
I then drained remaining fluid and refilled with dot3/4 fluid. Brakes never needed adjusted during or since....fluid replacement did the trick.

layneroxxx · 09-11-2008, 09:21 PM

Quote:

Originally Posted by warrior91

Removing mystery shipping fluid in brake is good start.

I bled ,rode,bled,rode...untill brakes faded... (It seemed 15 min of riding was all it took to heat the crappy fluid to the point of siezure.)
I then drained remaining fluid and refilled with dot3/4 fluid. Brakes never needed adjusted during or since....fluid replacement did the trick.

any hints on getting pressure back? I bled the line and emptied the caliper. Then I filled back up with dot 3 and bled it down to the caliper and screwed back in the bolt trying to line up the bolt hole with the hose. Then I pumped the brake to get pressure....none.

Any input is good...I haven't worked with brake lines much.

theENIGMATIC · 09-11-2008, 09:37 PM

If your getting fluid spillage when you bleed then good, if not keep bleeding till it spills, my bike has a bolt just above the brake lever close to my foot peg, when I loosen it it it pushes the brake lever down some, you can loosen it until your pistons are out far enough for your brake to work.not sure this helps? good luck!

layneroxxx · 09-12-2008, 03:28 PM

I've pumped the brake a thousand times with the nozzle off the bleed valve and no luck.

I've disconnected the bolt to the brake caliper and the hose squirts out break fluid when I push the break.

I've taken off the brake caliper and the caliper clamps when I push the brake, but it still won't bleed even after the brake completely closes and with the bleed valve open.

It obviously doesn't clamp hard enough because it is not enough to even come close to stopping the bike. There doesn't appear to be any leaks.

Any more help? If the caliper is bad does anyone know where to get a rear brake caliper?

Cal25 · 09-12-2008, 04:49 PM

Sounds like you may not be bleeding properly.

Push down the pedal and hold it down. Then open the bleeder for just a moment and close while the pedal is down.

Then pump the pedal several times and then push the pedal down and hold it. Again open the bleeder briefly and again close while the pedal is down.

Repeat till the pedal firms up, making sure you have plenty of fluid in the master cylynder.

I think your bringing air back into the system when you let the pedal go up while the bleeder is open

Good luck!

katoranger · 09-12-2008, 05:00 PM

Yes. You need to close the valve before you release the pedal. You will never get it bled otherwise.

Allen

warrior91 · 09-13-2008, 12:51 AM

Quote:

Originally Posted by Cal25

Sounds like you may not be bleeding properly.

Push down the pedal and hold it down. Then open the bleeder for just a moment and close while the pedal is down.

Then pump the pedal several times and then push the pedal down and hold it. Again open the bleeder briefly and again close while the pedal is down.

Repeat till the pedal firms up, making sure you have plenty of fluid in the master cylynder.

I think your bringing air back into the system when you let the pedal go up while the bleeder is open

Good luck!

:idea:

layneroxxx · 09-17-2008, 10:30 PM

Does anyone know where I can get a replacement caliper for the '01 lf200gy-5?

I can't get it to bleed no matter what. I wonder what can cause this? Remember it seized up in the first place, and now that I changed the brake fluid I can't get it to bleed.

DDG1976 · 09-18-2008, 05:30 AM

I had to gravity bleed mine, open the valve all the way, or even take it out. Hold down the pedal(forever) and just keep putting fluid in untill the bubbles stop coming out and you get a steady stream of fluid, then replace the valve and tighten it until it's closed. It takes forever, but it works, this is the only way I could get the piston inside my caliper to even move.

red2003 · 09-18-2008, 07:31 AM

OK, here's the problem. If you completely emptied the master cylinder, it has an air pocket in it and just pumping the pedal will never get it out. Here's what you need to do. Take the brake hose off the caliper and submerge it in a can of brake fluid. Now pump the crap out of the pedal. With the hose submerged in fluid it will eventually reverse bleed back into the master cylinder. Don't go buy a new caliper, that's not the problem. AND, you need to fix the adjustment bolt like was suggested earlier. Changing out the fluid will NOT fix the seizure problem.

theENIGMATIC · 09-18-2008, 04:51 PM

I would remove the whole system, before you detach the caliper use the brake lever to pump the pistons out as far as they go......then I would spray it all and wipe it into new condition with brake cleaner, then you put it all back on and bleed the new fluid in, make sure you bleed proper, push lever down open valve for about 2 seconds while lever is still depressed then tighten valve up good and release brake lever, you might have to open the bleeder valve quite a bit but never release the brake lever any until the valve is closed or you will get air in the system, make sure you push the pistons back into the caliper before returning it to the bike.....should work unless you have something clogging behind the pistons in which case you have to fully remove them to clean or there is something blocking your hose.....if you cant find anything wrong after doing proper maintenance a new caliper is bound to act up as well.if needed these guys might have what you need....www.china-parts.co.uk

09-08-2008, 06:05 PM	#1
layneroxxx Join Date: Jun 2008 Location: Wooster, OH Posts: 33	LF200gy-5 back brake calliper seizing Anyone have any ideas what would be making my lf200gy-5's rear brake calliper freeze or lock up? It's been happening every once in a while, especially after it has been sitting outside for 8 hours in the sun and then locks up on my way home. Then it just releases after I let it sit and then struggle to get it in the garage. Thanks for any input.
	0

09-08-2008, 06:13 PM	#2
Jaime Join Date: Jul 2008 Location: Charleston,SC Posts: 49	I think this might help, check it out. http://www.hooperimports.com/images/...rear_brake.JPG __________________ -Jaime The Citadel LF200GY-5
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09-08-2008, 09:29 PM	#3
Dragon Join Date: Nov 2007 Location: Tejas Posts: 834	I'm glad mine is drum brake. Don't have to worry about that. __________________ Chinabikeless
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09-09-2008, 07:57 PM	#5
warrior91 Join Date: Nov 2007 Location: N.E. Saskatchewan, Canada Posts: 679	Removing mystery shipping fluid in brake is good start. I bled ,rode,bled,rode...untill brakes faded... (It seemed 15 min of riding was all it took to heat the crappy fluid to the point of siezure.) I then drained remaining fluid and refilled with dot3/4 fluid. Brakes never needed adjusted during or since....fluid replacement did the trick. __________________ '91 Yamaha Warrior- stage 2 '83 Honda ATC 70 '08 Yongjiang 125cc mx (Loncin) '08 Yongjiang 150cc atv (Jinlong)
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09-12-2008, 05:00 PM	#10
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Yes. You need to close the valve before you release the pedal. You will never get it bled otherwise. Allen __________________ You meet the nicest people on a Honda Clone.
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09-09-2008, 03:21 AM	#4
czowner Join Date: Sep 2006 Location: North East England Posts: 313	I had to cut a few threads off the rod to get the adjustment correct. Jonathan.
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09-11-2008, 09:37 PM	#7
theENIGMATIC Join Date: Feb 2008 Posts: 392	If your getting fluid spillage when you bleed then good, if not keep bleeding till it spills, my bike has a bolt just above the brake lever close to my foot peg, when I loosen it it it pushes the brake lever down some, you can loosen it until your pistons are out far enough for your brake to work.not sure this helps? good luck!
	0

09-12-2008, 03:28 PM	#8
layneroxxx Join Date: Jun 2008 Location: Wooster, OH Posts: 33	I've pumped the brake a thousand times with the nozzle off the bleed valve and no luck. I've disconnected the bolt to the brake caliper and the hose squirts out break fluid when I push the break. I've taken off the brake caliper and the caliper clamps when I push the brake, but it still won't bleed even after the brake completely closes and with the bleed valve open. It obviously doesn't clamp hard enough because it is not enough to even come close to stopping the bike. There doesn't appear to be any leaks. Any more help? If the caliper is bad does anyone know where to get a rear brake caliper?
	0

09-12-2008, 04:49 PM	#9
Cal25 Join Date: Feb 2008 Location: Terrell and Grapevine Tx. Posts: 1,585	Sounds like you may not be bleeding properly. Push down the pedal and hold it down. Then open the bleeder for just a moment and close while the pedal is down. Then pump the pedal several times and then push the pedal down and hold it. Again open the bleeder briefly and again close while the pedal is down. Repeat till the pedal firms up, making sure you have plenty of fluid in the master cylynder. I think your bringing air back into the system when you let the pedal go up while the bleeder is open Good luck!
	0

09-17-2008, 10:30 PM	#12
layneroxxx Join Date: Jun 2008 Location: Wooster, OH Posts: 33	Does anyone know where I can get a replacement caliper for the '01 lf200gy-5? I can't get it to bleed no matter what. I wonder what can cause this? Remember it seized up in the first place, and now that I changed the brake fluid I can't get it to bleed.
	0

09-18-2008, 05:30 AM	#13
DDG1976 Join Date: Aug 2008 Location: Ringgold, Ga. Posts: 410	I had to gravity bleed mine, open the valve all the way, or even take it out. Hold down the pedal(forever) and just keep putting fluid in untill the bubbles stop coming out and you get a steady stream of fluid, then replace the valve and tighten it until it's closed. It takes forever, but it works, this is the only way I could get the piston inside my caliper to even move. __________________ I have all of soberday to satur up!!
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09-18-2008, 07:31 AM	#14
red2003 Join Date: Jan 2007 Location: Northern Vermont, USA Posts: 1,248	OK, here's the problem. If you completely emptied the master cylinder, it has an air pocket in it and just pumping the pedal will never get it out. Here's what you need to do. Take the brake hose off the caliper and submerge it in a can of brake fluid. Now pump the crap out of the pedal. With the hose submerged in fluid it will eventually reverse bleed back into the master cylinder. Don't go buy a new caliper, that's not the problem. AND, you need to fix the adjustment bolt like was suggested earlier. Changing out the fluid will NOT fix the seizure problem. __________________ First Chinabike: 2006 Roketa RSX200E Current Chinabikes: 2023 Titan DLX & 2022 Lifan KP Mini w/ 210cc BRT kit, 22 RWHP!
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09-18-2008, 04:51 PM	#15
theENIGMATIC Join Date: Feb 2008 Posts: 392	I would remove the whole system, before you detach the caliper use the brake lever to pump the pistons out as far as they go......then I would spray it all and wipe it into new condition with brake cleaner, then you put it all back on and bleed the new fluid in, make sure you bleed proper, push lever down open valve for about 2 seconds while lever is still depressed then tighten valve up good and release brake lever, you might have to open the bleeder valve quite a bit but never release the brake lever any until the valve is closed or you will get air in the system, make sure you push the pistons back into the caliper before returning it to the bike.....should work unless you have something clogging behind the pistons in which case you have to fully remove them to clean or there is something blocking your hose.....if you cant find anything wrong after doing proper maintenance a new caliper is bound to act up as well.if needed these guys might have what you need....www.china-parts.co.uk
	0