[Calvincase]

Thinking about doing a rear brake delete on my 1992 honda 300, I just don't know how i should go about it. Any ideas would be greatly appreciated

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[mac102004]

Cut down the backing plate and drum, then re install. Remove cables or zip tie out of the way.

Here is a pic of a cut down backing plate, it still needs a good bearing put in it. The drum basically just cut down until you take most of the aluminum off the steel core, I do it on the lathe but nothing you can’t do with a sawzall and a grinder with a flap wheel.

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[Calvincase]

Alright, thank you Mac!! Will try it soon

I'm just sick of ripping all the brakes.

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[fishfiles]

you know when you delete the brake , the seal to keep water and dirt out the bearings is also deleted cause it is in the brake drum cover

 

[mac102004]

Sort of. You still have the seal at the diff I suppose, IIRC it's only small on that side, but if it keeps the oil in, it'll keep water out. Then there is the double sealed bearing in the backing plate which also helps. If you were concerned about it you could put a zerk in the tube and pump it full of grease in between the diff and backing plate, and still run oil in the diff. Or maybe even put some kind of plug inside it to block anything off from making it to the diff.

 

[wheeler]

I'm doing the rear brake delete today. Grinding down the backing plate & drum. Really I believe that you will have less chance of water mud getting in anywhere.. Due to the fact most drums never seal correct letting water sit in there causing corrosion & seals & brakes to fail. I understand that the extra cover seal will help, but I've NEVER had any luck with Honda drum brakes. I don't mud any more, so I'll be good....

 

[Jeepwm69]

I'm going to try it both ways.

I have a 350D rear with perfect rear brakes, and a 350D that I discovered had a destroyed brake drum and backing plate (didn't realize it until I took the drum cover off.

I figure I'll fill the axle tube full of grease on the deleted axle.

Will be interesting to see if new seals in the good one will keep water out. It's PERFECT now and doesn't look like the donor bike was ever taken into mud or water.

 

[wheeler]

I figure I'll fill the axle tube full of grease on the deleted axle.

Exactly what I will do!!!

 

[fishfiles]

I have a 92 300 with a 250 rear end with brake delete , the differential and axles tubes are packed with grease , I am not a fan of the brake delete , seems to me there is no seal protecting the bearings once the brake cover seal is removed ---if not for the hub paddles I would stick have a brake on the rear ---if I were going to do a brake delete I would run grease and not oil and drill and tap the tubes and fill them full of grease also ---something I do when I check the oil in the rear diffs or re-pump them full of grease as I have a mix of both oil and grease diffs , is to pull the plug on the brake drum cover to check for water , if water has made in it to the drum then I know it is time to change the seal

 

[mac102004]

I don’t know about the 250 rear end or. 350 rear end id have to pull one apart and look at it. But with the 300 rear end there is still 100% a seal protecting the bearings as you are using the backing plate just cut down. The only seal you loose is the one on the drum cover, which never lasts anyway.


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[mac102004]

So I just checked a 350 rear end I have. No actual seal on those in the backing plate just 2 sealed roller bearings. Haven’t checked a parts diagram yet to see if there should be one


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[wheeler]

I understand what you are saying Fish. By removing the drum cover it's just one extra seal to prevent any water entering the brakes. But then you have the backing plate seal, tube of full of grease, then another seal on the diff.. so if any water is going to get in my diff, I'd be more concerned that it will enter from the rubber boot on the motor/swing arm. Due to the fact I don't have a nice seal on the driveshaft to diff.... I'll be sealing the boot with silicone then clamping it down.


Got my plate all ground down nicely yesterday. Today, I'm going to press the new bearing & seal in. I still have to grind down some more on the drum.

 

[LedFTed]

i just have to ask this question, so i might learn something. i have friends here, ky, with that brake system. the rear brakes dont work, they just go on with it. whats the reason/advantage to delete this rear brake system? curious an curiouser, i am..

 

[wheeler]

i just have to ask this question, so i might learn something. i have friends here, ky, with that brake system. the rear brakes dont work, they just go on with it. whats the reason/advantage to delete this rear brake system? curious an curiouser, i am..

Honda drum brakes were/are terrible. If they get wet, they don’t work. So in my case, I installed the front disc brake conversion kit. While I was rebuilding my rear end I chose to do the brake delete. Only advantage really, is the cables, vent hose, & foot pedal all gone. More ground clearance on that side now too. I like the cleaner look.

 

[fishfiles]

Around here I'd bet 90% of the people that do the brake delete do it for = axle paddles :

the new generation of paddles go around the brake drum , so deleting the brake isn't necessary