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 Rear rotor and brake pad.
My 2019 Ryker had the rear rotor became warped. so the rotor and pads had to be replaced. Has anyone else experienced that?
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Very Active Member
Could the brake have been out of adjustment and dragging on the rotor? That would produce a lot of heat and maybe warp the rotor, but if the pressure was not enough to notice, it would not be obvious unless you checked close.
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Very Active Member
Has the rear wheel been off the bike for some reason? Could the rotor have become damaged during handling?
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The answer to both of these questions is no. It is not a cheep fix, either.
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SpyderLovers Sponsor
It is rare that a rear rotor will warp. Have you run a dial indicator on the surface to see where and how bad the situation is? Can you see wobble if you spin the rear wheel? Are your pads wearing evenly? Are the pads dragging on the rotor? It's important to find out why the rotor is damaged before replacing parts.
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Very Active Member
A high speed stop, especially down a grade, produces a lot of heat.
If at the end of the stop, if the brakes remained applied, the exposed rotor cools at a different rate than the area covered by the pads, which can result in warping.
If the brake pedal is not rotated sufficiently forward to avoid touching with toe while riding, the rotors will get hot and if the brakes are fully applied and remain applied, this can result in warping.
If either of the above is applicable, why only the rear?
23 Moto Guzzi V7-850 SE 23 Yamaha XT250 18 Yamaha Bolt R-Spec 22 Triumph Street Twin 20 CanAM Ryker 900 14 Honda CB1100 18 Yamaha XT250 16 Moto Guzzi V7 II 17 Yamaha TW200 12 Triumph Bonneville 02 Sportster 1200 Sport 03 Sportster 883 76 Honda CB750F 75 Honda CB360 70 Yamaha CT1 72 Yamaha CT2 72 Yamaha AT2/CT2 70 Honda SL350 70 Honda CL350 67 Honda CL160 67 Honda CB160 62 Honda CA110
 
2020 900 , NGK 4218 iridium CR8EIX Matte black
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Very Active Member
 Originally Posted by Tslepebull
Has the rear wheel been off the bike for some reason? Could the rotor have become damaged during handling?
Interesting thought.
Front rotors slide over pins, but rear is bolted to hub.
If debris were under a contact point, the resulting lateral run-out should cause pedal pulsing.
Geo333: How was warpage diagnosed? When was it discovered?
23 Moto Guzzi V7-850 SE 23 Yamaha XT250 18 Yamaha Bolt R-Spec 22 Triumph Street Twin 20 CanAM Ryker 900 14 Honda CB1100 18 Yamaha XT250 16 Moto Guzzi V7 II 17 Yamaha TW200 12 Triumph Bonneville 02 Sportster 1200 Sport 03 Sportster 883 76 Honda CB750F 75 Honda CB360 70 Yamaha CT1 72 Yamaha CT2 72 Yamaha AT2/CT2 70 Honda SL350 70 Honda CL350 67 Honda CL160 67 Honda CB160 62 Honda CA110
2020 900 , NGK 4218 iridium CR8EIX Matte black
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It was diagnosed by the dealer. The pulsating was really bad. so I took it to the dealer to find out what the problem was. They are repairing it, with my OK.
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Very Active Member
Did the rotor show signs of build up on it's braking surface? I had the happen on a truck once and a parts store sold me little 3M rotary pads and a spindle to clean off the build up. Solved the issue for a few bucks.
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Things that move between machines: Ikea sheep skins, Zumo XT GPS, and extra tools. Hooker is going to be my summer trike up North; and Hookie my winter trike down South.
(Asphalt/Hookie) Elka shocks on front - BajaRon sway bar, OEM driver's backrest, LED headlights, dual USB with voltmeter, dash cam, foam grips - Magic Mirrors - front tires Vredestein Quatrac SL on PPA ORB Chrome wheels.
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Very Active Member
Pedal pulsing verifies the dealer diagnosis, but the question remains why?
What were driving conditions before the pulsing started?
23 Moto Guzzi V7-850 SE 23 Yamaha XT250 18 Yamaha Bolt R-Spec 22 Triumph Street Twin 20 CanAM Ryker 900 14 Honda CB1100 18 Yamaha XT250 16 Moto Guzzi V7 II 17 Yamaha TW200 12 Triumph Bonneville 02 Sportster 1200 Sport 03 Sportster 883 76 Honda CB750F 75 Honda CB360 70 Yamaha CT1 72 Yamaha CT2 72 Yamaha AT2/CT2 70 Honda SL350 70 Honda CL350 67 Honda CL160 67 Honda CB160 62 Honda CA110
2020 900 , NGK 4218 iridium CR8EIX Matte black
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I will not go into detail, but the rotor issue was my fault. I had done some work on the rear of the bike and caused the damage. End of story.
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I, for one, appreciate the feed back about the problem. Too many people post about the problem, but never come back to set things
straight as to how the problem was resolved.
Thank you.
Peggy and Howard
Hers: 2013 Spyder ST-S SM5
His: 1999 Honda VFR Interceptor
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