Scored rear brake disc - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 9 (permalink) Old 10-23-2010, 02:46 PM Thread Starter
Grand Prix 125
Main Motorcycle: 2011 Tbird Storm
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Location: San Jose, Calif
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Scored rear brake disc

Has anyone had a problem with the rear disc? I replaced rear tire at 6800 miles (still had some left but wanted new for this time of year). Tech told me my rear pads were getting thin so I replaced them. Started thinking...I don't use the rear brake that much and 6800 is really early for needing pads replaced. Checked the disc and it has a deep scoring all around. Rub it and it feels like the whole disc where contact to pads has fairly deep score lines. No wonder the pads got eaten up. Shop checked the caliper and said all is in spec. They talked to warranty rep and he said I probably rode the brake pedal. That is BS. I have had a couple of issues with the ECU and the coolant leak and the O-ring issue with the fuel injection. I have an early build and it seems like I got all the issues on this one bike but I never saw anything like the rear brake...Anyone?
Len
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post #2 of 9 (permalink) Old 10-25-2010, 02:43 PM
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I will check my disc, but I had to replace my rear pads at about that mileage as well. The dealer accused me of doing the same thing of riding the brake, and it is not something I do either.

I definitely need to check again, since I now have ~14k miles on the bike.

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post #3 of 9 (permalink) Old 10-25-2010, 09:47 PM
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What I do to prevent premature rotor wear is make sure the pads are not hangin up in the caliper.in other words,with the wheel off the floor just enough to rotate it,apply the brake and release it.it the wheel turns hard then your caliper is hangin up which will indeed wear and score the rotor.The other thing i do is to blow the calipers out with air atleast once a week.That brake dust can do a job on the rotors too.If ya don't have air,use a garden hose directing the spray right at the top of the caliper to wash that dust down and out of there.After ya do that,drive the bike slowly and apply the brake a few times to dry the pads out.On my previous machine,i replaced three rear brake rotors in almost 200,000 miles which isn't bad considering the mileage and weight of the RSV.I just kept doing what I just described and it paid off. Dave!!!
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post #4 of 9 (permalink) Old 10-26-2010, 10:46 AM Thread Starter
Grand Prix 125
Main Motorcycle: 2011 Tbird Storm
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Thanks Davetac, I will definately start cleaning more often now that I am sure I am going to have to pop for a new disc....Wells, I feel your pain. I have never owned a bike that I had to replace a disc and I have owned many in the 40 years I have been riding. As much as I like this bike, it is getting a little tedious with some of these nagging issues, ECU(still not right after 4 full weeks in the shop over three visits), water leak, fuel leak with the bad o-ring, now a chewed up brake disc. I hope this is end of these kinds of issues.
Len
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post #5 of 9 (permalink) Old 10-26-2010, 12:25 PM
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If the stealership did the inservice like they're SUPPOSED to do,which BTW,many dealerships charge extra for on delivery but don't do,GRRRRRR!! ,then a lot of these problems would be caught right off the bat instead of the poor customer being aggravated by em when he or she is on the road a million miles from home.Most embarrassing.When I bought my new Bird,I warned the guy about doin the inservice and doing it right,and told him I was gonna go thru it when I got it home.He assured me that it would be done right.Well guess what??They did NOT do it right and they HEARD about it the following week and I wasn't laughing when I walked thru that door.But I believe that I did get my point across.Now whether they got the point or not remains to be seen.I just know that when i walk thru the door,it's like a different place.

So my point is that a lot of these problems would not occur if the dealership did the inservice like they're supposed to do.Unfortunately,the same problem exists on most of the motorcycle dealers,no matter which make or model ya buy.Dave!!!
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post #6 of 9 (permalink) Old 09-17-2011, 11:03 AM
Grand Prix 250
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Just dropped by 2010 Bird @ my local bike shop after all the rear brake fluid vanished & after being refilled I had a horrendous grind coming from the rear brake. As it turns out, the retaining pins that hold the caliper in place had disappeared allowing the caliper to move hard up against the disc, wiped out the pads, caliper & rotor ! 4500 miles on the bike. I haven't heard of this happening anywhere but heads up.
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post #7 of 9 (permalink) Old 09-17-2011, 11:15 AM
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6800 is about normal. My stock pads were gone at 6000 and so were many others. Same with my old speedmaster. As to scoring, i guess that depends on what you call scoring but i never had a bike that didn't have some grooves in them. i think to some degree thats normal. Maybe not so on yours, but in any case 6800 on stock pads is completely normal.
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post #8 of 9 (permalink) Old 09-17-2011, 06:35 PM
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Regarding the caliper pins falling out,unless you or someone else worked on it,which I doubt,I'd say the Stealer did a pretty good job on predelivery,wouldn't you?? I'd be screamin blue murder.

After almost 24,000 miles,I have an Italian rear brake rotor on a Britsih machine.lol I ordered the new one [under warantee] alittle over a month ago and just picked it up this AM.Will be changin it ASAP.

As for the pads,Triumph tells ya to use the front brake for 90% of your stopping power.I wasn't doing that and was also only gettin 5-6000 miles out of mine too.But since I changed my braking habit,I now get 10,000-15,000 miles from a set of rear pads.They're only 1/8 inch [.125] thick when new.So ya really don't have a lot of lining to start with. Dave!!!
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post #9 of 9 (permalink) Old 09-18-2011, 12:09 AM
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I'm glad I found this post now. I'm due to lead a ride from Baltimore to Shanksville in a week, and with 7,000 miles already on. I went out to check and sure enough, the inner pad is down to almost nothing. Fronts look like they are only halfway done. Have a set on the way....

2nd Officer Harbor Chapter #215 Southern Cruisers Riding Club
Never take for granted what you have been given, and what you have earned....
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