Worthwhile post-ride check - is your rear brake hotter than hell? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 14 Old 05-30-2019, 04:35 PM Thread Starter
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Worthwhile post-ride check - is your rear brake hotter than hell?

Near the end of a 300 mile trip with temps near 100F, I noticed increased driveline lash when traffic turned to stop-and-go. It felt like the chain was loose.

When I finally got to my destination, I went to lube my chain and noticed a "clunk" noise as the wheel turned - my brand new (<2,000 mile) cush drive rubber was not holding the hub securely. Sure enough, the brake was dragging. Not enough to be noticeable in motion, but enough to heat the hub and bake the rubber. What a waste, I should have known better.

I think my rear brake pin is worn beyond use so I'll replace it, but I also plan to heat check my rear brake disk at gas stops in the future for the peace of mind, and grease the pin far more often than before.
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post #2 of 14 Old 05-30-2019, 05:42 PM
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Good idea, but take care HOW you check that disc. It's heat may exceed the design tolerance of human flesh.
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post #3 of 14 Old 05-30-2019, 06:58 PM Thread Starter
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Originally Posted by Bentwee View Post
Good idea, but take care HOW you check that disc. It's heat may exceed the design tolerance of human flesh.
Very good point, do be careful how personal you get with it. I hold my hand near it first, then touch it very briefly to get a quick idea of the temp.

To be honest, this is probably not necessary if you're keeping your brakes clean and lubed all the time. But if yours is exposed the way mine is, you'd be doing it every weekend.
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post #4 of 14 Old 05-31-2019, 11:15 AM
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I roasted the rear disk on my 800ST after adjusting the pedal. Gotta be very careful when playing with the controls.
After a ride, the disk shouldn't be any hotter than the last braking effort made it. It's not like the exhaust that is being pumped hot gases.
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post #5 of 14 Old 06-01-2019, 10:31 PM
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My rear brake has never really worked. Press down and bike coasts to a slow stop. Kind of freaked me out first time I used it. Good thing I only use front brake.
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post #6 of 14 Old 06-02-2019, 12:03 PM
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Fig, unless you have ABS you should be able to lock the rear brake. True, most effective braking is done with the front but having the rear do some of the stopping is nice.
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post #7 of 14 Old 06-02-2019, 12:07 PM
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Fig, unless you have ABS you should be able to lock the rear brake. True, most effective braking is done with the front but having the rear do some of the stopping is nice.
And if you (Fig) do have ABS, you should be able to get the brake pedal to pulsate as the rear wheel begins to slip repeatedly, if you press it hard enough.
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post #8 of 14 Old 06-02-2019, 01:35 PM
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Yah, Trep. On some BMW's it's most disconcerting kick back. You really know it's there.
Haven't ridden a Strom with ABS so i don't know it's characteristics.
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post #9 of 14 Old 06-02-2019, 02:05 PM
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Originally Posted by notacop View Post
Yah, Trep. On some BMW's it's most disconcerting kick back. You really know it's there.
Haven't ridden a Strom with ABS so i don't know it's characteristics.
The ABS pulsation on the 650A brake pedal is quite noticeable, (which I count in the '+' column), but is milder (relative to sensitivity and applied control force) than what occurs on the front brake lever. I've never found it objectionable, and like the feedback telling me I've reached the traction limit under the specific conditions.

On the subject of an ineffective rear brake: I find that I often prefer to use some trail braking, especially on turns where the maximum curvature is not fully apparent on the approach. If the rear brake was not available for that braking, I would want it fixed pronto. Yes, for a maximal straight deceleration on dry pavement, the rear brake is dispensable. But on wet pavement, and more so on slightly oily pavement (or newly wetted pavement), the rear brake's contribution can be significant for a suddenly crucial stop or slowing. So letting it under-perform is a safety compromise.
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post #10 of 14 Old 06-02-2019, 03:05 PM
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Originally Posted by fig View Post
My rear brake has never really worked. Press down and bike coasts to a slow stop. Kind of freaked me out first time I used it. Good thing I only use front brake.
Your rear brake pads could have gotten some brake fluid on them from a leaky caliper or when brake fluid was changed. I would change the brake pads and thoroughly clean both sides of the disk with a good brake parts cleaner. Another possibility is a clogged or restricted master cylinder.
The rear brake isn't meant to halt you like an arresting cable on an aircraft carrier, but it should be able to slow the bike fairly quickly.

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