[xBhp Universal Thread]: Rear disc brake on yam FZ16, ...and others

[kinshuk.arya]

this one is a great thread.... thanks for the details dude....

P.S: To mods please make this thread sticky.

[Aneesh@4GHz]

Awesome DIY bro.

[Lucky Luke]

Originally Posted by chinmayachaitanya

i own a dazzler which has discs both in the front and back........ it has more dis advantages than advantages..........

The most important risk is that the disc locks very quickly and the tyre skids.. so i suggest it is better not to have a rear disc unless you have an efficient abs system

Is that an hypothetical risk or a lived experience?

I would not endorse this opinion though, since disc of drum, what causes the wheel to block is the braking power. One can jam his drum brakes, take my word on this! It's just a matter of how much effort is applied to the lever/ pedal.

Having, on this particular bike, ridden with a drum and now a disc rear brake, I can say that the disc feels more progressive than the drum.

This being said, I would have loved to have ABS....

Originally Posted by nagthemissile

I know that rear disc break is more safer than drum break.What about its maintenance. i heard from local mechs that rear disc break increases maintenance in comparison to drum break like disc plate bending,break fluid hose leakage or damage.Is it a myth or fact?

It's an undeniable fact, since the simple drum system constituting on a lever on a pedal, a connecting rod, a lever on the brake actioning a cam opening two brake pads is now replaced by an hydraulic master cylinder (itself containing many parts), fed by a separate reservoir, and then a high pressure pipe to a hydraulic caliper whose piston pushes the pads against the disc, itself being an object exposed to weather, damages of all kind...

Nevertheless, disc brakes are mounted on nearly all bikes, cars, even bicycles (no hydraulics there), some trains, and all commercial planes! Not too bad for such an un-reliable system isn't it?

You know what I think: the basic reason why many of these small and medium size bikes are fitted with a rear drum brake is cost! It is more simple hence cheaper to make a drum , and it just has to be "sufficient", not the "best possible system"!

[RanjithMN]

Originally Posted by chinmayachaitanya

i own a dazzler which has discs both in the front and back........ it has more dis advantages than advantages..........

the most important risk is that the disc locks very quickly and the tyre skids.. so i suggest it is better not to have a rear disc unless you have an efficient abs system

Originally Posted by Lucky Luke

Is that an hypothetical risk or a lived experience?

I would not endorse this opinion though since disc of drum, what causes the wheel to block is the braking power. One can jam his drum brakes, take my word on this! It's just a matter of how much effort is applied to the lever/ pedal.

Having, on this particular bike, ridden with a drum and now a disc rear brake, I can say that the disc feels more progressive than the drum.

This being said, I would have loved to have ABS....

Once again great work Luke.If you dont mind please merge your second post with the first one
and abt what chinmayachaitanya said.
He is right..the rear disk of Hero Honda HUNK which i believe has the same setup as the DAZZLER in reference gets locked up very,very easily.its pretty dangerous for newbies who tend to use the rear more often.

[itssaurabh.negi]

Very nice thread.. excellent explanation as well.
But i doubt here in india it would be called as DIY coz we dont have that much of skills to perform such an modification..
Thanks for sharing, i hope one day i'll be doing this to my ride on my own

[Lucky Luke]

Originally Posted by RanjithMN

..... andabt what chinmayachaitanya said.
He is right..the rear disk of Hero Honda HUNK which i believe has the same setup as the DAZZLER in reference gets locked up very,very easily.its pretty dangerous for newbies who tend to use the rear more often.

Did not know that!
Wouldn't a solution be to lengthen the lever on he brake pedal (or shorten the pedal) so that more effort is needed for the same braking power? (there again, would need professionally done job).

I had just a look at pictures of the Unicorn/ Dazzler, and saw that it has a very long pedal. Difficult to say what is the ratio between the length of the pedal and that of the lever since the cylinder is hidden, and the ratio between the area of the piston in the cylinder and the one in the caliper also counts (and that can't be known at all unless one knows the characteristics of the parts), but anyway I am sure that Honda has measured, compared, tried, etc...

I was ready to go through some experiments on that, but am perfectly happy with my setup as it came up.

So, best way seems to get the bike tuned to what you feel suitable for you and your driving style!

[bilalans]

Originally Posted by Lucky Luke

So, best way seems to get the bike tuned to what you feel suitable for you and your driving style!

Nicely said luke and brilliantly planned and executed. thanx for sharing.

[SpeedyKol]

Great DIY thread, description and the drawings are too fab. thanks a lot.Has any xBhpian in India tried this out? Indian local mechanics are so "good" that they will make a hell of the bike while doing this!

[christo]

one word: awesome.
i'll do it once i find a good mechanic in my city
Rated 5.

[SpeedyKol]

I don't know where to get this from! Will have to hunt for it one day.