Rear brakes dragging=fire - Yamaha Grizzly ATV Forum
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post #1 of 15 Old 04-16-2017, 04:46 PM Thread Starter
 
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Rear brakes dragging=fire

A friend took my 08 700 for a 5 minute ride. I wasn't around to talk about it before hand and make sure he knew what controls did what. Shortly after he rode it and parked it, I came back home to it and the back plastic brake shields were melted all over the inside of the wheels, brake fluid squirted out all around the back right wheel fender, and the plastic burning around the back right caliper. After getting the fire put out, it is obvious the brakes were dragging. The rotors appear to be in terrible condition, nearly blue. Brake fluid dripping both on the back right and out of the hand brake reservoir. Plastic melting on the rear outer cv joint boots. None of the fenders were harmed.

I asked him if he was trying to clutch it or riding a brake and he claims not, and that he immediately realized that the brake pedal was a brake. My theory is that either both back brakes were somehow dragging from a mechanical issue, or that maybe his foot was resting on the brake pedal.

Any common brake issues with an 08 Grizzly?

I am going to need several parts within the rear brake assemblies. Who to buy from?

Several farm ATV's:
Honda Fourtrax 250
Honda 300 (3)
Honda Rancher 350
Honda Rubicon 500
Yamaha Kodiak 400
Honda XL 350 bike
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post #2 of 15 Old 04-16-2017, 04:51 PM
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Foot was probably resting on the pedal. I've seen friends do it with my bikes and they always deny it because they don't want to be responsible for anything even though they are borrowing a machine for free.

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post #3 of 15 Old 04-16-2017, 05:23 PM
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I have to agree with krs. You learn who your real friends are when bad stuff happens.

If I want parts fast, I buy them from Rocky Mountain ATV.
If I want parts cheap, I buy from Ron Ayers Motorsports online.

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post #4 of 15 Old 04-16-2017, 05:43 PM
 
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His foot was on the brake pedal. No doubt about it.
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post #5 of 15 Old 04-16-2017, 05:50 PM
 
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Sorry for your grief. That kind of stuff is exactly why nobody rides my Grizzly.

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post #6 of 15 Old 04-16-2017, 08:46 PM Thread Starter
 
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I pretty well agree that the foot must have accidentally been riding on the pedal. Just curious if there was some type of random common brake dragging issue with these before coming to a conclusion. Been a good machine, under 4000 miles and no issue except stator going bad(yamaha customer support covered nearly all of the fix after a phone call on a maybe 6 year old machine)

I wonder if this will be an insurance claim? I suspect I need new calipers, pads, rotors plastic shields and a brake line or two for the back.

Thanks

Several farm ATV's:
Honda Fourtrax 250
Honda 300 (3)
Honda Rancher 350
Honda Rubicon 500
Yamaha Kodiak 400
Honda XL 350 bike
Grizzly 700 (2008) stock
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post #7 of 15 Old 04-16-2017, 08:56 PM
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How much is your deductible, are you doing the work yourself, and do you want your insurance to go up?

2016 Grizzly 700 EPS SE Carbon Metallic
Iron Baltic skid plate kit
Warn 2500 winch
Heat Demon heated grips/thumb warmer.
Yamaha heated seat cover
Yahama rear box
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26" ITP Blackwater Evo Tires on SE wheels.

2015 Grizzly 700 EPS SE Silver
Iron Baltic Skid Plate Kit.
Warn 2500 winch
Heat Demon heated grips/thumb warmer.
Street legal kit
Wheels: Douglas Rattlesnake (machined outer)
Tires: 26x9x12 Sedona Rip Saw

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post #8 of 15 Old 04-16-2017, 09:32 PM
 
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I had a wheel bearing fail which caused the rotor to not run true through the caliper. This caused rubbing which boiled the brake fluid and caused brake fade.
I replaced the bearing and the brakes were fine.
I didn't see the tire leaning over from failed bearing, but it was.
It was on the front also and I didn't feel a problem with the steering.

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post #9 of 15 Old 04-16-2017, 09:42 PM Thread Starter
 
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Quote:
Originally Posted by Ridgway81432 View Post
I had a wheel bearing fail which caused the rotor to not run true through the caliper. This caused rubbing which boiled the brake fluid and caused brake fade.
I replaced the bearing and the brakes were fine.
I didn't see the tire leaning over from failed bearing, but it was.
It was on the front also and I didn't feel a problem with the steering.
Thats a possibility, but this is on a machine well taken care of, no known problems, and both back brakes melted everything in a 5 minute ride.

Guess when time permits, I will tear it down and start ordering parts.

Any ATV salvage yards?

Several farm ATV's:
Honda Fourtrax 250
Honda 300 (3)
Honda Rancher 350
Honda Rubicon 500
Yamaha Kodiak 400
Honda XL 350 bike
Grizzly 700 (2008) stock
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post #10 of 15 Old 04-16-2017, 10:04 PM
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It seems like there must be salvage yards because the insurance company sold my rzr to a place that sounded like it sold used orv parts, but I've never heard of one, other than auctions for entire vehicles. There's always eBay.

I would not want to buy salvage parts to fix my baby though.

I suggest that you make up a parts list, get pricing, and talk with your "friend" about taking responsibility and about whether he wants to keep being your friend.

I guess you could offer to share the responsibility with him: your part for letting him get on it without a proper intro, and his part for trashing your machine.

2016 Grizzly 700 EPS SE Carbon Metallic
Iron Baltic skid plate kit
Warn 2500 winch
Heat Demon heated grips/thumb warmer.
Yamaha heated seat cover
Yahama rear box
Street legal kit
26" ITP Blackwater Evo Tires on SE wheels.

2015 Grizzly 700 EPS SE Silver
Iron Baltic Skid Plate Kit.
Warn 2500 winch
Heat Demon heated grips/thumb warmer.
Street legal kit
Wheels: Douglas Rattlesnake (machined outer)
Tires: 26x9x12 Sedona Rip Saw

2007 Grizzly 700 EPS (Deep Purplish Blue) [Sold]
2007 Grizzly 700 EPS (Special Edition Silver) [Sold]
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post #11 of 15 Old 04-16-2017, 10:12 PM
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I was thinking a little more about the insurance thing, and it being a 2008 model with 4000 miles, you could probably get a repair estimate that would cause the insurance company to total it for you. The payout might even be close to used market value, which would be a step up compared to what a dealer would have given you for trade-in. You could get yourself into a new last year's model hanging around at a dealer somewhere, or maybe a super low mileage trade-in, and only be a few thousand in the hole.

2016 Grizzly 700 EPS SE Carbon Metallic
Iron Baltic skid plate kit
Warn 2500 winch
Heat Demon heated grips/thumb warmer.
Yamaha heated seat cover
Yahama rear box
Street legal kit
26" ITP Blackwater Evo Tires on SE wheels.

2015 Grizzly 700 EPS SE Silver
Iron Baltic Skid Plate Kit.
Warn 2500 winch
Heat Demon heated grips/thumb warmer.
Street legal kit
Wheels: Douglas Rattlesnake (machined outer)
Tires: 26x9x12 Sedona Rip Saw

2007 Grizzly 700 EPS (Deep Purplish Blue) [Sold]
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post #12 of 15 Old 04-17-2017, 10:10 AM
 
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Quote:
Originally Posted by seedcleaner View Post
Thats a possibility, but this is on a machine well taken care of, no known problems, and both back brakes melted everything in a 5 minute ride.

Guess when time permits, I will tear it down and start ordering parts.

Any ATV salvage yards?
I just thought I would mention something else that will make the brakes VERY hot. Mine did that after weeks of inspection to get ready to ride with 3 other members traveling to this area for a week. Things just happen.
Plus, if you have bad bearings and don't replace them, and 5 minutes after installing the new parts, you have another fire, your buddy will shoot the finger at you.

Jim,
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COOP45 Primary, 1.5 mm shim, -1.5 mm belt, Purple Secondary Spring, 21 gram weights, weight covers reduced to 29 mm diameter and a 2 mm Cut Cam Plate. 2 heat range hotter plug, Warn Winch, Passenger Foot Rests, Rock Deflectors, Heated Grips and Hand Mitts, Grab Strap, Cooling System Up-Grade and multiple position mirrors.
8040 miles, 812 hours on 1-1-15
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post #13 of 15 Old 04-20-2017, 09:58 AM
 
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On my '07, I had trouble with the brakes hanging up. It didn't cause a fire, but it did blue up the rotors and made the plastic brake shields warp. The problem on mine was in the brake to shift mechanism. The cable for the rear brake pedal was sticking, so when you stepped on the brake to shift into gear the brakes and brake light would stay on. On mine, the brake light would eventually go off after 100 yards or so.


The problem you described might also be caused by seizure of the piston in the master cylinder. After having that fire I'd at least rebuild the master cylinder, if not replace it, just because of the fluid boiling you described.
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post #14 of 15 Old 04-21-2017, 05:24 AM
 
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I had a stick lodge in foot brake mechanism next to frame that jammed my brake on, if this happened, stick will still be there. Buy Oem parts online, guessing around 750 to 1000 in parts.

New rear knuckle assembly, new brake calipers complete, don't rebuild yours probably warped, new brake disc, new rock shield, maybe new bolts for all of this, new axle nuts, check axle, may have burned boot off, edit, just re read original post...two new sti rear axles........ as mentioned maybe new master cylinder and brake lines.

Look hard at fire damage area and make sure that your gas tank shield has not been compromised, located under gas tank, mine was burned out with a muffler fire, thread on here somewhere titled fire fire Grizzly on firE.

Edit. Just went to cheap cycle parts and ran some numbers, double my estimate, 1500 to 2000 in parts to replace everything that might be heat damaged, that is just in parts and you doing the work, none of this is hard, new rear knuckle assembly will probably need all new bushings and maybe bolts, not sure how much heat this system took? Brake line parts and assembly are pricey, bunch of little stuff you will probably need,

Edit edit....you might need some new brake cables or parts too, that caused this failure.....could have been a foot also?

Do you do your own work? If yes pull a tire off and give us some pics, maybe not the worse case scenario, inspect your rear shocks also.

P


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post #15 of 15 Old 04-21-2017, 08:48 AM
 
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I wouldn't jump on your friend too quick. Alot of things can go wrong and make them stick. If I were to guess, I'd say this had been going on awhile and you didn't notice. I've never seen brakes get that hot in 5 minutes on an atv. My brother in law used to forget to take off the parking brake and ride for an hour, never blued a rotor though. If they were tight enough to get that hot that fast, surely he would have noticed the rear wheels locking up the second he let of the throttle.

If he's a close friend, I'd be inclined to take his word for it. If he's not a close friend and had never ridden an atv you might want to push for some cash.

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