MetalGear Brake Disc Rotor Front L or R for HONDA CX 500 C Custom 1981 | eBay

Find many great new & used options and get the best deals for MetalGear Brake Disc Rotor Front L or R for HONDA CX 500 C Custom 1981 at the best online prices at eBay!

www.ebay.com.au

 

That's very good to know that there is someone who produces these new, I will check if there is a shop in europe that sells these. Thanks so much!

 

inaff_mak when looking for parts for your bike do not look for parts for a CX500E. The CX500E was a 1982 model know as the CX500 Sport (Honda CX500E Sport Road Test - Classic Motorbikes).

 

inaff_mak when looking for parts for your bike do not look for parts for a CX500E. The CX500E was a 1982 model know as the CX500 Sport (Honda CX500E Sport Road Test - Classic Motorbikes).

Thank you very much! I'm checking it right now

 

I suspect you have assumed that an engine serial number beginning with "CX500E-" means the bike is a CX500E but Honda model numbers don't work that way. The information on the page linked below may help you figure out which model you actually have

Honda CX400 and CX500 Engine and Frame Serial Numbers

“Trying to figure out the year of your Honda CX500’s frame and engine? Find out here!”…

motofaction.org

Welcome to the forum. Please add your location and (once you figure out what you actually have) your bike's model and model year to your profile so that you don't have to remember to tell us every time and we don't have to keep asking when you forget (see Forum Settings link in my signature).

And welcome to the world of antique vehicle ownership (they own us, not the other way around). Your bike is about 4 decades old and may or may not have had all of the maintenance necessary to keep it safe & reliable so it is highly recommended to download the Factory Shop Manual for your model (available through the CX Wiki - link in my signature) and go through all of the service procedures, regardless of whether your bike has reached the specified mileage.
I also recommend looking on all rubber parts with suspicion because rubber does not age gracefully. Check the date codes on your tires and replace them if they are over 5 years old no matter how good they look & feel (old rubber simply cannot flow around the irregularities in the asphalt well enough to grip, especially if it is cool or wet). If your bike still has the original rubber brake line(s) (should be replaced every 2 or 3 fluid changes = 5 or 6 years) I recommend shopping for modern stainless braided ones (they last practically forever and double the life of the fluid). And don't forget things like the rad hoses and the boot between the engine and swingarm (they can crack on the bottom where you don't see it).

 

I suspect you have assumed that an engine serial number beginning with "CX500E-" means the bike is a CX500E but Honda model numbers don't work that way. The information on the page linked below may help you figure out which model you actually have

Honda CX400 and CX500 Engine and Frame Serial Numbers

“Trying to figure out the year of your Honda CX500’s frame and engine? Find out here!”…

motofaction.org

Welcome to the forum. Please add your location and (once you figure out what you actually have) your bike's model and model year to your profile so that you don't have to remember to tell us every time and we don't have to keep asking when you forget (see Forum Settings link in my signature).

And welcome to the world of antique vehicle ownership (they own us, not the other way around). Your bike is about 4 decades old and may or may not have had all of the maintenance necessary to keep it safe & reliable so it is highly recommended to download the Factory Shop Manual for your model (available through the CX Wiki - link in my signature) and go through all of the service procedures, regardless of whether your bike has reached the specified mileage.
I also recommend looking on all rubber parts with suspicion because rubber does not age gracefully. Check the date codes on your tires and replace them if they are over 5 years old no matter how good they look & feel (old rubber simply cannot flow around the irregularities in the asphalt well enough to grip, especially if it is cool or wet). If your bike still has the original rubber brake line(s) (should be replaced every 2 or 3 fluid changes = 5 or 6 years) I recommend shopping for modern stainless braided ones (they last practically forever and double the life of the fluid). And don't forget things like the rad hoses and the boot between the engine and swingarm (they can crack on the bottom where you don't see it).

Thank you so much for all the information. I'm checking the frame and engine serial number right now. I said it was a CX 500 E because it is written on the original paper that was released and registered at the Italian Motorbike Federation in 1980, but I assume they were wrong at the time. The motorbike is actually in almost perfect shape and condition, I'm looking for new brake rotors because I wanted to increase the efficiency of the brakes but talking with my mechanic here in Italy, he told me that maybe we can grind the rotor and make it flat again (still, I will prefer to change them). If you know about any kind of brake rotor that's compatible with it let me know. I will write on my profile the correct model and country (which is Italy as I told before) and on this post.
Thanks again for the welcome and all the info, I appreciated a lot.
Best

 

The listing I posted is for the twin disc size. Given your location I assume that's what you will have.

The price is horrible.

There is also this mob, whose discs are cheaper. You would need to clarify with them if they sell discs for your model as they give no dimensions in their listing. The listing already supplied specs 245 mm.

Honda CX500 CUSTOM 1982-1984 Front Brake Disc Rotor OEM Spec MDS01055 | eBay

Find many great new & used options and get the best deals for Honda CX500 CUSTOM 1982-1984 Front Brake Disc Rotor OEM Spec MDS01055 at the best online prices at eBay!

www.ebay.com.au

 

I will check it right now. Thanks a lot!

 

The E stands for engine ....

 

ahahahah that's good to know. Sorry for my ignorance, I was just reporting the info from the original registration paper. Anyway I checked the last link you sent me and I noticed that the disc is for the Custom model, I read that the disc for that model is bigger than the discs on the cx500A, isn't it?

 

Depends on your market and whether your bike has one or two discs. I'm in Australia and have two Australian market 500Cs. They use the same forks and twin discs as my standard models - like your A.

I would expect the Italian bikes to have twin discs. It's generally just the Americans who don't care if they can stop or not. 😱

The single disc is larger at {I think} 290 mm.

 

We do care about stopping, always wondered why almost every other country got twin discs and we didn't?

 

We've got longer distances to stop in.

 

It's all about style. Note that the single disc models have larger discs, though, which goes a long way toward offsetting having only one.

 

I never really compared the swept area of the two, wonder how close they are? Does diameter come into play also? Buell's only have one but they are almost the size of the tire!!!

 

I think that also the caliper dimension is bigger in the US model. Could it be that the double discs rotors offers better performances considering the road network of the European cities, that's very different from the one in the US?

 

Twin discs use 38 mm calipers. Single use 43 mm .... but the pad remains the same.

And .... this is just my perception ..... I have a number of both discs here and THINK that the larger disc has a higher iron content which would give higher stopping power over a higher grade stainless. I base this on the fact that they seem more inclined to rust.

I confess to never having ridden a CX with a single disc so can't really compare the performance.

 

It's not just the pad contact area. A larger diameter disc means the caliper has more leverage.

 

Seriously, I think it has more to do with heat dissipation. As mentioned above, the American and European driving environments are different. Assuming more aggressive and frequent breaking on European roads, the dual disc would spread the breaking load, and the heat generated, over a larger area and volume of material.

 

Surely the 2 smaller discs plus 2 calipers would dissipate heat better than one larger disc with only 1 caliper.
No, it is all about leverage. In the same way moving your hand farther along the handle lets you apply more torque to a wrench having the caliper grab the disc farther from the axle will also allow it to do more work.

Dual discs were perceived as "sporty" and people on this side of the ocean were more interested in something more like cruisers.
Note that Honda did include dual discs on the Eurosport and Turbo models, making the CX650Es imported to Canada the only normally aspirated twin disc CX bikes sold in North America.

 

Surely the 2 smaller discs plus 2 calipers would dissipate heat better than one larger disc with only 1 caliper.

That's my point. Dual disc doesn't necessarily provide more braking power, just more tolerance for over braking.

 

There is a whole lot more to it than that Bob. Yes you get more mechanical advantage with a larger diameter rotor but with that you have the rotor moving through the brake pads at a faster rate which can increase heat. There is always a compromise which is why manufacturers and engineers spend so much time and money on them.

 

Actually, having the disc move through the pads faster means that the part of the disc being heated by friction moves out from between the pads faster so if anything less heat should build up.

Randall: Sorry. I somehow got the idea that you meant the single disc would cool better (which it will to some degree but not as much as having 2 discs).
And I somehow forgot about the Interstate models having 2 discs, although I was technically correct if you only include models actually called CX ;-)

Anyway, all that said the twin disc setup would really have superior brakes if it had the same size discs as the single disc models but with the smaller discs not so much. I imagine factors like style and the amount of braking force they expected to be needed for the weight of the bike & rider were factored in when they were designing them.

 

Changed the title of the thread to CX500A.

 

Theoretically one would think the twin disk set up would be more suited to twisty roads...and better handling(even unsprung weight).....maybe that was a design consideration...

 

Bought my last pair from ABE Suppliers of High Quality Brake Disks| Fork Stanchions Shock|Brake Pads (allbikeengineering.co.uk)