Hi guys, the front discs are slightly warped.

As I see it my options are:-

1. New OEM....................not gonna happen toooo expensive.

2. Used OEM...................at least they'll be Honda quality (though they're the original discs that have warped )

3. Cheap Chineese knock off's........Might not work out that cheap in the end if the quality is rubbish.

4. Known brand after market..........Still expensive @ about £250 and up.

Question. What causes the discs to warp, I know the short answer is heat, but why exactly?

Thanks for any replies oppinions

 

On the other hand, the OEM discs that warped are at least 18 years old since this is the 93 to 99 forum. That isn't too bad even at the price of new ones.

I wouldn't get cheap Chinese (but I repeat myself) as they will warp quickly. Used if you check them out thoroughly before committing yourself. Aftermarket will be either CC or expensive and might not be better quality than OEM.

Personally I'd save up and buy good ones new, whether OEM or aftermarket from a reputable company.

Generally they warp because of heat. (Ha ha, had to go there). Uneven heating and cooling causes material to expand and contract at different rates. That is why most discs have holes or slots, to increase airflow and cooling.

 

Hi Heresolong, thanks for the reply.

I'm leaning towards a good used pair.

Mind you, I just got back from a fast ride, with some hard braking and there was no judder this time

I don't think the bike was used too much in recent years, maybe that has something to do with it

Maybe I'll pop some new pads in.

Any more thoughts on this?

 

If brake fluid hasn't been changed in a while, instead of smooth & predictable clamping, you will instead get incremental movement from the slave cylinder.
The slave cylinder won't move freely and smoothly, but instead have binding and stiction.

It is also nice to have slave cylinders that don't have rust or pitting so that they do move freely in the caliper.
Are you sure that isn't your problem?

A warped brake disc will pulsate when you apply the brake. You'll hold the brake at a steady pressure, and you'll feel pulsating as you are rolling. Faster rolling = faster pulsating.

I'm trying to buy a used fridge for an apartment that I am renting....seems as though asking to see the fridge in working order and plugged in is too much to ask for--some sellers are crappy sellers and offer crappy deals.
Used rotors can be a good deal, but the proper inspection on them may be something that the seller can't do or won't allow you to perform (so maybe eBay isn't ideal if you want to properly inspect the used item first).
Moral of the fridge story is that not every seller offers items with the proper considerations.

 

Thanks for the replies guys.

I think I've decided I'm going to rebuild the front brakes.

This was something I was going to do this winter anyway and once I have the parts, it won't take long. Shouldn't even loose a days riding

I'll have to find the time when I can, but I'll update the thread when I'm done.

Though the bike is an old model it's only done about 35,000 miles, so maybe the discs aren't faulty after all

 

Plus one on brake fluid. If you don't have pulsing then it might not be warped rotors. DOT 3 and 4 fluids should be changed out every couple years. Yours might not have been changed out in the last twenty years. Master cylinder rebuild kits to go a step deeper are generally only about $30 in the US. I'd flush and go riding and then rebuild if that doesn't take care of it. Before concluding that the discs are warped get a dial runout indicator.

Good luck.