fazer thou rear caliper

[nickodemon]

What exactly do i need to change rear caliper to a fazer thou one? Do i need hanging bracket and torque arm?

[bozboz]

If changing a 98-03 fazer 600 to a thou caliper all you need is the caliper from an early fazer 1000 (01-05ish). The hanger from the 600 stays the same but you just file it down alittle to help the thou fit onto its existing mounts mount one bolt and keep filling untill the othe hole is fluch with the caliper). Really easy mod-dont even need to swap bolts or brake lines.

[nickodemon]

Sounds straight forward enough. Thanks for the info

[mickvp]

Sorry for the hijack (and dim witted-ness), but why is this such a common/popular mod? Does the thou caliper work any better than the 600 one (more pistons etc) or is it just because they are less prone to sticking through it's design?

[mr self destruct]

Yeah I'd like to know what the advantage is too. Is it a better design or just bigger?


If the pistons are just bigger then surely you'll need a bigger master cylinder too, because you'll just be pushing the same amount of brake fluid into a bigger chamber resulting in weaker brakes otherwise. Won't you?

[69oldskool]

Opinion seems divided on that one but i noticed a significant improvement & my standard caliper was working properly when removed.

Thou caliper has larger pistons,so even if you don't notice or need the extra stopping power you should notice a bit more 'feel' in the brake pedal.

@ Mr self desruct, no it doesn't work like that, there will be a little more pedal travel but correspondingly less pressure need be applied~ the hydraulic ratio increases,generally perceived as a good thing (within reason.)

[dcurzon]

i too, am not seeing any sense in this... the rear brake isnt exactly a 'stopping' brake... a light dab to help tighten up in a corner.  As long as its not binding, then nowt wrong with the stock brake imo. 

Of course, if its prettier, then hells yeah!

[darrsi]

I don't personally see any need to change it either, if the original caliper is functioning as it should then as mentioned it is more than enough to do the job.
Just my opinion though! 

[69oldskool]

Probably true,
                  some of us grew up with bikes that needed application of both brakes (& engine braking) to stand a remote chance of stopping in time.
Guess old habits are hard to break, if you'll excuse the poor pun

[mr self destruct]

Forgive my ignorance, but I don't understand how less pressure need be applied?
If the master cylinder is pushing the same volume of fluid into a larger diameter chamber, then the pressure on the surface of the piston is lower isn't it?


(The principle I'm thinking of here is pushing a drawing pin into a wall. The force on the flat end and the sharp end are equal, but the pressure on the sharp end is a lot higher meaning it goes into the wall as opposed to the flat end going into your thumb!)


So to compensate (to get that pressure back up), you need to push more fluid in by pushing the pedal further.


Or is that the entire point? So with the increased travel you effectively get finer control of the existing braking power rather than an increase?

[darrsi]

You have two shit hot calipers up front doing the bulk of the stopping power, the rear is for the finer stuff like moving/braking in slow traffic, etc.
As i said if it's working correctly a good tap will still lock the rear wheel up, so why would you need more?

[69oldskool]

Brake ratios:
http://www.airheart-brakes.com/pdfs/Mast...ection.pdf
hope that helps somewhat for starters.

@ Darrsi~ what if you've got a big gal on the back?  :lol

~& you wana try that on an 80's bike!  :rollin :rollin :rollin

[trudd]

I use my fazer for motogymkhana which uses a lot of rear brake and the 1000 caliper is a significant improvement over the standard one. Although, my rear caliper was a rusty mess so it's not an entirely fair comparison.

[darrsi]

Brake ratios:
http://www.airheart-brakes.com/pdfs/Mast...ection.pdf
hope that helps somewhat for starters.

@ Darrsi~ what if you've got a big gal on the back?  :lol

~& you wana try that on an 80's bike!  :rollin :rollin :rollin

I have a very good but also honest answer to that question.
The bike has a weight limit of 180kg.
I'm a touch over 100kg.
Then i have a large size top box which at a guess, with bracketry and always at least half loaded, has got to be 25kg.
That leaves my passengers a weight limit of 55kg, which i believe is roughly around the 8.5 to 9 stone area.
I don't make them, but rules is rules  :lol

[69oldskool]

[quote author=69oldskool link=topic=10471.msg109992#msg109992 date=1382981574]
Brake ratios:
http://www.airheart-brakes.com/pdfs/Mast...ection.pdf
hope that helps somewhat for starters.

@ Darrsi~ what if you've got a big gal on the back?  :lol

~& you wana try that on an 80's bike!  :rollin :rollin :rollin

I have a very good but also honest answer to that question.
The bike has a weight limit of 180kg.
I'm a touch over 100kg.
Then i have a large size top box which at a guess, with bracketry and always at least half loaded, has got to be 25kg.
That leaves my passengers a weight limit of 55kg, which i believe is roughly around the 8.5 to 9 stone area.
I don't make them, but rules is rules  :lol
[/quote]

I think you've got me on that one    :lol :lol :lol 

[darrsi]

I use my fazer for motogymkhana which uses a lot of rear brake and the 1000 caliper is a significant improvement over the standard one. Although, my rear caliper was a rusty mess so it's not an entirely fair comparison.

That's the whole thing though, when i got my bike i didn't really realise that my brakes up front weren't functioning anywhere near as well as they should have been, and i'd imagine a few other foccers probably have the same issue without knowing it.
Basically the fella who previously owned my bike did little or no maintainence to anything.
I ended up buying a used but refurbished set of calipers on the quick and was astounded by the difference.
That's why i give my brakes a bit of TLC every few months to keep them in good nick and they work properly all the time.
Brakes can quite easily sieze over a very slow period of time so that you don't really notice until it's too late, so they're always worth a quick clean with brake cleaner and a toothbrush, and a regrease on the pistons every now and then.

[trudd]

I hadn't had the bike long but gave it full service when I bought it and decided to swap the caliper rather than fix it. But I have to say that it's better than the other fazers I've tried.

[paulchucky]

cant see the need as theres little difference and as said in thread back brake is only generally used gently in corners for stability and in traffic when manovering  90 % of braking is on the front n them blue dot f***ers stand the bike on its nose


ps: anyone remember trying to lock up a drum brake ? with cable operated lever ? exactly 
:lol :lol

[Yamazer-92]

I want to get one, I see the reasons behind getting it are:

• They're less prone to seizing which the standard ones do a lot if not cared for and ridden through winter
  
• They look a lot cooler and match the front (Check out davec's bike in show me your fazer thread)
  
• If you can get one for about £50, you will likely save money in the long run as refurbing the standard caliper every ???? miles will cost £'s especially as it's likely pistons will be too corroded to re-use. With brakes I think it's worth using good (usually expensive) parts.
  
• If the 1000 rear caliper is like the fronts, it will be 100 times easier to clean and get the pistons free and moving. Cleaning and freeing up mine is always a nightmare compared to how easy the fronts usually are.
  
• It's more powerful / has better feel (not really that important for most people, fronts are the workhorses and a well cared for standard does a good job anyway).
  

My rear is starting to bind and I clean my brakes pretty often, so I'm now working out the best option to take whether it's buying the 1000 caliper or properly stripping and refurbing my original. I agree it's probably not really an "upgrade" but depending on how much you can get the 1000 one for it's a worthwhile mod in my opinion.

[bozboz]

Well the reasons for me changing mine were that:

-Found one cheap at xmas time when I should have been buying presents for others....
-Now the back matches the front (gota love the anodize)
-Definatly better feel so if you need to use it (which granted is rare) you know its not guna let u down.

My 600 caliper which is somewhere on the garage floor in a pile of crap was on the way out so it made sense to replace as a whole and not spend £30 on new piston+seal kit + further £15 on pads.

Look for a bargain tho as they are certainly not worth £100+ like Ive seen them listed on fleabay before!