OEM Brake Pad replacement??? - Page 2

dave92029 · 08-14-2015, 10:56 AM

My front brake is pulsating, so I need to contact Ryan to ask for a replacement.

Does the front brake pad need to be replaced at the same time? Wouldn't the Brake pad also have uneven wear due to the faulty rotor?

What is the recommended torque for the bolts? Why would I need to replace the bolts?

Thanks

Dave

SpudRider · 08-14-2015, 12:04 PM

Installing the rotor bolts is not a problem. The problem arises while trying to remove the rotor bolts. The bolts are bathed in loctite at the factory, and probably installed with an impact driver.

Therefore, it is very easy to strip the Allen key head, which can make the bolt very difficult, or impossible to remove without machine work.

Remove the bolts slowly, and with great caution, taking care not to strip the head. It is recommended to heat very troublesome bolts with a propane torch.

After you successfully remove the bolts the first time, subsequent installation and removal of the bolts is an easy process.

3banger · 08-14-2015, 12:26 PM

A number of us have reported brake pulsation. Has anybody made the run-out measurements with dail yet? I can feel the pedal of the rotors just be for coming to a hard stop but no pulsing at speed.

I really do need to find a more aggressive pad, I'm worried my ham fisted braking technique I've developed to stop the RX in a reasonable distance will end in desaster the first time a panic breaking situation arises in my Sprint.

SpudRider · 09-06-2015, 01:17 AM

I didn't measure run-out with a dial indicator. However, I did measure the thickness of my old brake rotor with a micrometer, and I noticed numerous variances in thickness.

After doing some research, I concluded the front brake rotor has the same dimensions as many KTM brake rotors. The only difference is the RX3 brake rotor has larger bolt holes. If one wanted to insert helicoils in the front hub to accept smaller bolts, I'm sure he could switch over to the KTM brake rotor.

pete · 09-06-2015, 01:30 AM

Quote:

Originally Posted by SpudRider

I didn't measure run-out with a dial indicator. However, I did measure the thickness of my old brake rotor with a micrometer, and I noticed numerous variances in thickness.

After doing some research, I concluded the front brake rotor has the same dimensions as many KTM brake rotors. The only difference is the RX3 brake rotor has larger bolt holes. If one wanted to insert helicoils in the front hub to accept smaller bolts, I'm sure he could switch over to the KTM brake rotor.

would it not be easyer to drill the KTM rotor for the bigger bolts ?
Or is that not possable ?

..

SpudRider · 09-06-2015, 01:38 AM

Quote:

Originally Posted by pete

would it not be easyer to drill the KTM rotor for the bigger bolts ?
Or is that not possable ?

..

I think you are correct, Pete.

Unfortunately, I don't own a drill press, neither do I own good drill bits for cutting hard steel.

pete · 09-06-2015, 01:52 AM

Quote:

Originally Posted by SpudRider

I think you are correct, Pete.

Unfortunately, I don't own a drill press, neither do I own good drill bits for cutting hard steel.

Ok.. theres 2 items for yer shoping list....

..

SpudRider · 09-06-2015, 02:15 AM

Rather than drill the brake rotors every time, I would rather stick with Zongshen rotors, or install helicoils.

pete · 09-06-2015, 02:58 AM

Quote:

Originally Posted by SpudRider

Rather than drill the brake rotors every time, I would rather stick with Zongshen rotors, or install helicoils.

how meany brake rotors do you intend to go though..?

SpudRider · 09-06-2015, 12:07 PM

Quote:

Originally Posted by pete

how meany brake rotors do you intend to go though..?

How many do you intend to use?

rjmorel · 09-08-2015, 01:05 AM

Spud, I measured thickness on my pulsing front rotor also and found it to be about .005/in variance. Rear one was within .001". Bought a new rotor and surface ground the old one best I could and it made it usable with a very mini pulse feel to it. Keeping the new rotor for later. rj

SpudRider · 09-08-2015, 01:34 AM

I'm fairly confident Zongshen does not manufacture brake rotors. I'm pretty sure Zongshen bought these brake rotors from another company, and assembled our shipment of RX3 motorcycles with a bad batch of rotors.

Since CSC offers such excellent customer service, replacing a bad brake rotor under warranty is an easy task.

Therefore, I am content to stick with the stock brake rotor, since it does a good job when it is within proper specifications.

Jay In Milpitas · 09-09-2015, 12:02 AM

On the subject of brakes, I noticed that after my first ride the front smelled a bit hot. Since it was only a short, leisurely putt around the neighborhood I though that odd.

Close examination found that the front cylinder mount was too close to the throttle assembly and when released was hitting, not allowing full retraction of the master cylinder piston.

Quick little adjustment inboard prevented a possible heating/warping situation.

Weldangrind · 09-09-2015, 01:39 AM

That's a very good tip, Jay.

Juanro · 10-23-2015, 01:49 PM

So, is there a replacement or compatible part number for the front brake pad?

08-14-2015, 10:56 AM	#16
dave92029 Join Date: Jun 2015 Location: Escondido, CA Posts: 117	Brie pad My front brake is pulsating, so I need to contact Ryan to ask for a replacement. Does the front brake pad need to be replaced at the same time? Wouldn't the Brake pad also have uneven wear due to the faulty rotor? What is the recommended torque for the bolts? Why would I need to replace the bolts? Thanks Dave __________________ Dave
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08-14-2015, 12:04 PM	#17
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	Installing the rotor bolts is not a problem. The problem arises while trying to remove the rotor bolts. The bolts are bathed in loctite at the factory, and probably installed with an impact driver. Therefore, it is very easy to strip the Allen key head, which can make the bolt very difficult, or impossible to remove without machine work. Remove the bolts slowly, and with great caution, taking care not to strip the head. It is recommended to heat very troublesome bolts with a propane torch. After you successfully remove the bolts the first time, subsequent installation and removal of the bolts is an easy process. __________________ 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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09-06-2015, 01:17 AM	#19
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	I didn't measure run-out with a dial indicator. However, I did measure the thickness of my old brake rotor with a micrometer, and I noticed numerous variances in thickness. After doing some research, I concluded the front brake rotor has the same dimensions as many KTM brake rotors. The only difference is the RX3 brake rotor has larger bolt holes. If one wanted to insert helicoils in the front hub to accept smaller bolts, I'm sure he could switch over to the KTM brake rotor. __________________ 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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09-06-2015, 02:15 AM	#23
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	Rather than drill the brake rotors every time, I would rather stick with Zongshen rotors, or install helicoils. __________________ 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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09-08-2015, 01:05 AM	#26
rjmorel Join Date: May 2007 Location: Warshington Posts: 928	Spud, I measured thickness on my pulsing front rotor also and found it to be about .005/in variance. Rear one was within .001". Bought a new rotor and surface ground the old one best I could and it made it usable with a very mini pulse feel to it. Keeping the new rotor for later. rj __________________ Live Zong, and Prosper
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08-14-2015, 12:26 PM	#18
3banger Join Date: Nov 2014 Posts: 159	A number of us have reported brake pulsation. Has anybody made the run-out measurements with dail yet? I can feel the pedal of the rotors just be for coming to a hard stop but no pulsing at speed. I really do need to find a more aggressive pad, I'm worried my ham fisted braking technique I've developed to stop the RX in a reasonable distance will end in desaster the first time a panic breaking situation arises in my Sprint.
	0

09-08-2015, 01:34 AM	#27
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	I'm fairly confident Zongshen does not manufacture brake rotors. I'm pretty sure Zongshen bought these brake rotors from another company, and assembled our shipment of RX3 motorcycles with a bad batch of rotors. Since CSC offers such excellent customer service, replacing a bad brake rotor under warranty is an easy task. Therefore, I am content to stick with the stock brake rotor, since it does a good job when it is within proper specifications. __________________ 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
	0

09-09-2015, 12:02 AM	#28
Jay In Milpitas Join Date: Jul 2015 Location: Milpitas, CA. USA Posts: 775	Check your lever. On the subject of brakes, I noticed that after my first ride the front smelled a bit hot. Since it was only a short, leisurely putt around the neighborhood I though that odd. Close examination found that the front cylinder mount was too close to the throttle assembly and when released was hitting, not allowing full retraction of the master cylinder piston. Quick little adjustment inboard prevented a possible heating/warping situation.
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09-09-2015, 01:39 AM	#29
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	That's a very good tip, Jay. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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10-23-2015, 01:49 PM	#30
Juanro Join Date: Oct 2015 Posts: 321	So, is there a replacement or compatible part number for the front brake pad?
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