Rear disc keeps locking up!! - Page 2

TeamCheap · 06-16-2007, 11:21 PM

If the brakes feel solid then there is most likely NO air in it if it's soft/spongy feeling then there is air in it.

I dont have the "nos" bottle on the rear of mine so it's not causing the problem unless the bottle in some way would stop it from happening.

katoranger · 06-16-2007, 11:30 PM

Yes, the front doesn't have any problems. I never check to see if it was overfilled either. Might just need to bleed it off after I reattach it.

Allen

vmtz · 06-17-2007, 09:30 AM

I just got my bike last week and on the second ride it locked up. I adjusted the stop bolt all the way up and did another 25 miles yesterday with lots of stop and go, so far so good.

Vince

katoranger · 06-17-2007, 11:13 AM

Ok, I went out and basically bled out the rear brake system and it seems to be working fine now. I have some more travel in the pedal too. I don't use the rear alot except in off-road riding or hard stops.

I will see if it sticks again today as the two times it happen to me it occur almost in the same place.

Allen

katoranger · 06-18-2007, 09:03 AM

Okay, I made it about 15 miles and it stuck again. I never even touched the rear brake. I did as teamcheap suggested and cracked the bleeder and it released. I made it the rest of the way to work and all the way home with no problems.

I packed the 8mm wrench to use.

Allen

fatboy250 · 06-18-2007, 09:21 AM

Check out http://www.chinariders.net/modules.p...t=172&start=30 about midways down. I posted a comment about this.

This is probably the issue. There are others who have done this mod since to fix the problem too. Just do a search.

Jason

katoranger · 06-18-2007, 01:32 PM

Thanks. That is where I will look next. I suspected it after the first time it happen and I was able to adjust the pedal stop and release it. I have the "proper" tools described to fix it.

Also I am going to check the steering nut to make sure it is tight.

Thanks, Allen

katoranger · 06-18-2007, 04:18 PM

This is from fatboy. I am just adding a picture.

For Roketa Models:

Ok, Dad and I have figured out the deal on this. If you look at the bottom of your rear break master cylinder (not the slave at the wheel) you will see where the armature pushing in has two linkages with a bolt and two nuts for adjustment. Well, even with the nuts in the lowest setting where the linkages are both resting on the top nut, the master cylinder armature is still being pushed into the master cylinder creating some pressure. So, you will need to permanantly remove the nut between the two linkages and shorten the bolt (a grinding wheel may work well) so that the two linkages are touching. This will allow the master cylinder armature to release all the way out. We believe it's not necessarily a design flaw, but more of where the weld ended up for the bracket that holds both the rear foot peg bracket and the master cylinder. If this bracket weld had been about 1/2" higher the master cylinder armature would be allowed to extend all the way out with the stock bolt and nuts adjustment.

Here is a picture of the master cylinder on my bike.

Now the linkage you are talking about is the actuater rod for the master right. Gold colored part. I didn't have any more problems today so I haven't touched it yet.

I did find out that one of the caliper bolts was contacting the rotor and left a nice gouge in it.

Allen

fatboy250 · 06-18-2007, 04:38 PM

Yeah here is the picture of mine after the nut was removed. http://www.chinariders.net/gallery2/...g2_itemId=3385

Jason

katoranger · 06-18-2007, 04:49 PM

Okay. I think I understand it now. I think your master is slightly different.

What kind of tire is that?

Dunlap?

Allen

pumpkin · 06-19-2007, 11:55 AM

katoranger,

after i adjusted my pedal just like yours mine still hung up so i allso had to adjust linkage on the master cyl. there isn't much adjustment ,but for my bike it was just engh.

jkomp316 · 06-19-2007, 12:24 PM

on my GY-5 I had to adjust the stop nut and that was it. if you go up far enough or take the nut out, the pedal just hits on the kick starter. i have the stop bolt stopping it just before that. havent had any problems yet.

katoranger · 06-19-2007, 01:49 PM

Thanks, so far I haven't had anymore problems. I won't ride tonight due to an impending storm approaching from Alabama, but I hopefully again on Wednesday. Starting to accumulate miles finally. Bike keeps running better with time too.

Allen

fatboy250 · 06-19-2007, 04:11 PM

Quote:

Originally Posted by katoranger

What kind of tire is that?
Dunlap?
Allen

Linked in the Cross Reference thread -- Cheng Shin Barracuda

katoranger · 06-19-2007, 06:47 PM

Thanks, it may end up with street tires after these wear out.

Allen

06-16-2007, 11:30 PM	#17
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Yes, the front doesn't have any problems. I never check to see if it was overfilled either. Might just need to bleed it off after I reattach it. Allen __________________ You meet the nicest people on a Honda Clone.
	0

06-17-2007, 11:13 AM	#19
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Ok, I went out and basically bled out the rear brake system and it seems to be working fine now. I have some more travel in the pedal too. I don't use the rear alot except in off-road riding or hard stops. I will see if it sticks again today as the two times it happen to me it occur almost in the same place. Allen __________________ You meet the nicest people on a Honda Clone.
	0

06-18-2007, 09:03 AM	#20
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Okay, I made it about 15 miles and it stuck again. I never even touched the rear brake. I did as teamcheap suggested and cracked the bleeder and it released. I made it the rest of the way to work and all the way home with no problems. I packed the 8mm wrench to use. Allen __________________ You meet the nicest people on a Honda Clone.
	0

06-18-2007, 09:21 AM	#21
fatboy250 Join Date: Sep 2006 Location: COLUMBIA, SC Posts: 973	Check out http://www.chinariders.net/modules.p...t=172&start=30 about midways down. I posted a comment about this. This is probably the issue. There are others who have done this mod since to fix the problem too. Just do a search. Jason __________________ 2008 Jonway MC-70-150 2007 Roketa DB-07B (RSM-200E) 2006 Roketa DB-07A (RSX-200E) 1995 Kawasaki Concours (ZG1000)
	0

06-18-2007, 01:32 PM	#22
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Thanks. That is where I will look next. I suspected it after the first time it happen and I was able to adjust the pedal stop and release it. I have the "proper" tools described to fix it. Also I am going to check the steering nut to make sure it is tight. Thanks, Allen __________________ You meet the nicest people on a Honda Clone.
	0

06-16-2007, 11:21 PM	#16
TeamCheap Join Date: Jun 2006 Location: directly under the earths sun............NOW Posts: 2,302	If the brakes feel solid then there is most likely NO air in it if it's soft/spongy feeling then there is air in it. I dont have the "nos" bottle on the rear of mine so it's not causing the problem unless the bottle in some way would stop it from happening.
	0

06-17-2007, 09:30 AM	#18
vmtz Join Date: May 2007 Posts: 12	I just got my bike last week and on the second ride it locked up. I adjusted the stop bolt all the way up and did another 25 miles yesterday with lots of stop and go, so far so good. Vince
	0

06-18-2007, 04:18 PM	#23
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	This is from fatboy. I am just adding a picture. For Roketa Models: Ok, Dad and I have figured out the deal on this. If you look at the bottom of your rear break master cylinder (not the slave at the wheel) you will see where the armature pushing in has two linkages with a bolt and two nuts for adjustment. Well, even with the nuts in the lowest setting where the linkages are both resting on the top nut, the master cylinder armature is still being pushed into the master cylinder creating some pressure. So, you will need to permanantly remove the nut between the two linkages and shorten the bolt (a grinding wheel may work well) so that the two linkages are touching. This will allow the master cylinder armature to release all the way out. We believe it's not necessarily a design flaw, but more of where the weld ended up for the bracket that holds both the rear foot peg bracket and the master cylinder. If this bracket weld had been about 1/2" higher the master cylinder armature would be allowed to extend all the way out with the stock bolt and nuts adjustment. Here is a picture of the master cylinder on my bike. Now the linkage you are talking about is the actuater rod for the master right. Gold colored part. I didn't have any more problems today so I haven't touched it yet. I did find out that one of the caliper bolts was contacting the rotor and left a nice gouge in it. Allen __________________ You meet the nicest people on a Honda Clone.
	0

06-18-2007, 04:38 PM	#24
fatboy250 Join Date: Sep 2006 Location: COLUMBIA, SC Posts: 973	Yeah here is the picture of mine after the nut was removed. http://www.chinariders.net/gallery2/...g2_itemId=3385 Jason __________________ 2008 Jonway MC-70-150 2007 Roketa DB-07B (RSM-200E) 2006 Roketa DB-07A (RSX-200E) 1995 Kawasaki Concours (ZG1000)
	0

06-18-2007, 04:49 PM	#25
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Okay. I think I understand it now. I think your master is slightly different. What kind of tire is that? Dunlap? Allen __________________ You meet the nicest people on a Honda Clone.
	0

06-19-2007, 11:55 AM	#26
pumpkin Join Date: Jan 2007 Location: Westover wv Posts: 443	katoranger, after i adjusted my pedal just like yours mine still hung up so i allso had to adjust linkage on the master cyl. there isn't much adjustment ,but for my bike it was just engh. __________________ 06 american lifan 200 gy-5
	0

06-19-2007, 12:24 PM	#27
jkomp316 Join Date: May 2007 Location: Milwaukee, WI Posts: 145	on my GY-5 I had to adjust the stop nut and that was it. if you go up far enough or take the nut out, the pedal just hits on the kick starter. i have the stop bolt stopping it just before that. havent had any problems yet.
	0

06-19-2007, 01:49 PM	#28
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Thanks, so far I haven't had anymore problems. I won't ride tonight due to an impending storm approaching from Alabama, but I hopefully again on Wednesday. Starting to accumulate miles finally. Bike keeps running better with time too. Allen __________________ You meet the nicest people on a Honda Clone.
	0

06-19-2007, 06:47 PM	#30
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	Thanks, it may end up with street tires after these wear out. Allen __________________ You meet the nicest people on a Honda Clone.
	0