D90 Brakes, what's the deal?

honda50r

Well-known member
Jul 10, 2011
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East Tennessee
My brakes started grinding today. I'm on the hunt. In studying the wizardry of Google I'm more overwhelmed than I thought. I don't need D90 brakes by any means but if it makes more sense I may go that route. (AKA convince me)
 

jafir

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May 4, 2011
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Northwest Arkansas
honda50r said:
My brakes started grinding today. I'm on the hunt. In studying the wizardry of Google I'm more overwhelmed than I thought. I don't need D90 brakes by any means but if it makes more sense I may go that route. (AKA convince me)

If you need rotors and calipers anyway, might as well get vented rotors and matching defender calipers. (people keep saying 90 and 110... but that's not the difference. Late 110 have vented rotors and early 90s don't, so there difference is more the age and less the model)
 

fishEH

Well-known member
Jan 26, 2009
6,930
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Lake Villa, IL
What a bunch of shit. I just took my wheels off to swap front springs and guess what?
Yep the vented/drilled/slotted D90 rotors were packed full of mud from the last trip I went on, which was in May. Spent half an hour blowing compressed air into all the vents and jabbing them with a screwdriver.
Took it for a spin when I was done and my wheel shake disappeared.

Does anyone make solid D90 rotors?
 

jafir

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May 4, 2011
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Northwest Arkansas
That would be one heavy rotor. I've never looked at the calipers for vented rotors before, but some have mentioned they are just non-vented with spacers. Can you just take the spacers out and put your old non-vented disco rotors back on?
 

robertf

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Jan 22, 2006
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its probably the drilling and slotting that caused it, and not so much the venting. Why would you buy those anyway, the normal vented rotors are only 40 bucks from napa.
 

fishEH

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Jan 26, 2009
6,930
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Lake Villa, IL
its probably the drilling and slotting that caused it, and not so much the venting. Why would you buy those anyway, the normal vented rotors are only 40 bucks from napa.
Because these were $50. You think the mud is getting in through the drilled holes, not just straight into the vent?
 

lunchbox

Well-known member
Apr 20, 2004
2,141
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St Louis, MO
They are probably mad because you won't link your front. Therefore taking their anger out on you by not letting go if that sweet IN mud.
 

robertf

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Jan 22, 2006
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Because these were $50. You think the mud is getting in through the drilled holes, not just straight into the vent?

I think its allowing it to anchor in place. Most vehicles have vented fronts and this isn't a common problem.
 

fishEH

Well-known member
Jan 26, 2009
6,930
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Lake Villa, IL
I think its allowing it to anchor in place. Most vehicles have vented fronts and this isn't a common problem.

Ok, that's what I couldn't understand. All I heard was how awesome the D90 shiz was and all this mud nonsense had me scratching me head.

I'm not linking it, Chad! :-D
 

robertf

Well-known member
Jan 22, 2006
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I did it to both of mine, ineeded brakes at the time so its really hard to tell if it improved anything.

I just got a non ABS master cylinder shipped from England and a new prop valve so after this weekend the brakes should be as good as they get for a rover.