10-28-2015, 06:52 PM | #46 |
Join Date: Aug 2015
Location: Buenos Aires, Argentina
Posts: 135
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Brake has improved a lot, but the pulsating issue remains
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10-28-2015, 06:53 PM | #47 |
Join Date: Oct 2015
Posts: 321
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Welcome to the dark side! Did you left the spring piece inside the caliper? Have you seated the pads yet?
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10-28-2015, 06:57 PM | #48 |
Join Date: Aug 2015
Location: Buenos Aires, Argentina
Posts: 135
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I had to remove that piece otherwise the pad would not fit. I think they are pretty much seated at this point, I believe the stock pads are hard as rock that's why they take long to seat
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10-28-2015, 09:31 PM | #49 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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The pulsating front wheel is caused by a brake rotor which has uneven thickness.
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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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10-28-2015, 09:36 PM | #50 | |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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Quote:
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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 Last edited by SpudRider; 10-29-2015 at 02:37 AM. |
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10-28-2015, 09:37 PM | #51 | |
Join Date: Aug 2015
Location: Buenos Aires, Argentina
Posts: 135
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Quote:
Also, there are lots of users with this issue here @ Arg. It's not a isolated issue |
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10-28-2015, 09:52 PM | #52 | |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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Quote:
Zongshen doesn't manufacture brake rotors. Apparently Zongshen got a bad batch of front brake rotors from its supplier.
__________________
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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10-28-2015, 10:43 PM | #53 | |
Join Date: Jul 2015
Location: Tigbauan, Iloilo City, Panay Island, Philippines
Posts: 177
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Quote:
I had recall's on two of my BMW, F650's and we all know all manufactures have some problems, it's a matter of the manufacture and dealer responding to the problem and making it right and the customer happy.
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Riceburner Robin / Face Hunter I Medical Mission Matters www.medicalmissionmatters.org |
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10-29-2015, 09:32 AM | #54 | |
Join Date: Oct 2015
Posts: 321
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Quote:
The new pads touch about the same area as the old ones, perhaps a couple mm more to the inner side of the disc. I measured my disc thickness all round with an analog, dial caliper good to the 1/100 of mm and it was between the tolerance of the instrument, i mean: thickness variation was about or lower than 1/100 mm. But it still pulses. |
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10-29-2015, 11:35 AM | #55 | |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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Quote:
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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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10-29-2015, 01:57 PM | #56 |
Join Date: Oct 2015
Location: White Mtns. NH
Posts: 488
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What Weldandgrind is checking is runout and that is really what we are concerned with static measuring will give you some idea if a part will have run out but an indicator measuring a rotating disk will give you truly what you need to know. Also calipers have graduations down to 1/100mm but that is not their accuracy no set of calipers on earth are that accurate nor are the humans squeezing them, for that you would need good quality micrometers. But with that said if you have no visual deviation with your calipers in thickness you can still have disk run out, many brake disk get over heated and warp. If the stock pads are hard they can cause over heating of the disk causing the warped disk to pulsate causing the issue.
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2016 Versys 650 LT, 2015 RX3 Red, 2011 Ural GearUp, |
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10-29-2015, 02:45 PM | #57 | ||
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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Quote:
Quote:
Since both my Honda XR650L and Honda CRF250X employ the FA185 brake pads, I have a new, spare set of these front brake pads handy. I will install them in the next few days, and give them a test ride, myself.
__________________
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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10-29-2015, 02:49 PM | #58 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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Even without a dial indicator, you can tell if the brake rotor has excessive runout. Just look for uneven wear on the brake rotor.
I received a new, front brake rotor from CSC, and it eliminated the pulsating front brake. However, I still have a little uneven wear on my front brake rotor. In contrast, my rear brake rotor is wearing perfectly evenly.
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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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10-29-2015, 03:07 PM | #59 |
Join Date: Oct 2015
Posts: 321
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Hi, as mentioned above, I didn't measured runout but thickness, using this (picture attached). It consistently showed 3.92~3.93 mm thickness in various points around the disc.
To check for runout I don't have the right instrument. I layed the disc flat over my marble countertop and over a thick glass piece I have over my workind desk, and couldn't detect any click when gently pressing around, so I called it good |
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10-29-2015, 03:14 PM | #60 |
Join Date: Oct 2015
Posts: 321
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What I DID notice is that some of the supporting bolts are either misaligned or the hole is just a bit smaller than needed. When putting the disc back I couldn't get the bolts to seat by hand before torquing, even when I was using extra caution and doing it in a cross pattern and so on; I wonder if this is putting some uneven tension on the disc when mounted and causing it to warp or distort ever so lightly.
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