Topic: Twin Brake Callipers

[Sam Green Racing]

What time Simon ?  I'll put the kettle on.

[lordmoonpie]

 

[Sam Green Racing]

1 lump or 2

[srook]

You don't have to have a special right hand bracket for the K0-K1 forks.  You can use an extra left hand bracket with some slight modifications.  Here is a pic of a left hand bracket converted to a right hand bracket.  I did this years ago so I don't remember how much meat I took off the lower mounting boss, but it wasn't that much.  You also have to use two spacers to get the bracket to sit true over the caliper like the left side.









I ended up not using this bracket because I chose not to put dual disks on the Lester.  I would have had to modify the hub to accept a cut down speedo gearbox and I didn't want to do that.  If anyone wants the bracket, mounting bolts and spacers let me know.
Scott

[Ricky_Racer]

PM Sent! RR

[scottly]

You don't have to have a special right hand bracket for the K0-K1 forks.  You can use an extra left hand bracket with some slight modifications.  Here is a pic of a left hand bracket converted to a right hand bracket.  I did this years ago so I don't remember how much meat I took off the lower mounting boss, but it wasn't that much.  You also have to use two spacers to get the bracket to sit true over the caliper like the left side.
Scott

I had already suspected it could be done; thanks for the confirmation. I measured my old left side bracket today, and it appears the to make it the same offset when mounted on the right, that .140" would need to be removed from the lower boss, and the spacers for the upper bosses would be .460" thick. However, I don't know if this would work with the speedo drive. My bike has a Morris wheel, and I think the right hand bearing plate, which is thicker, was for a single disc setup, as even with the special bracket, the brake arm didn't line up properly with the disc. I still have to mock up the wheel to see if there is still a problem with the newer forks.
Also, I have attached a pic of my old K1 fork-leg (on the left), with my K7 fork leg. The difference in the mounting bolt pattern for the early C mount vs the later T mount is very apparent.

[sangyo soichiro]

Hey Guys.  Scottly brought this thread to my attention.

I'm looking to do a dual brake on my K2.  I'm looking to buy the caliper, arm, and brake line.  It's got to fit the K2 though.  I have what looks like a K7 or K8 if anyone wants to trade or buy it.

This is my parts wanted thread:
http://forums.sohc4.net/index.php?topic=72067.0

And in this thread are some photos of what I have to offer:
http://forums.sohc4.net/index.php?topic=72188.msg802465#msg802465


Thanks

[CPHjimm]

Hey Guys.  Scottly brought this thread to my attention.

I'm looking to do a dual brake on my K2.  I'm looking to buy the caliper, arm, and brake line.  It's got to fit the K2 though.  I have what looks like a K7 or K8 if anyone wants to trade or buy it.

This is my parts wanted thread:
http://forums.sohc4.net/index.php?topic=72067.0

And in this thread are some photos of what I have to offer:
http://forums.sohc4.net/index.php?topic=72188.msg802465#msg802465


Thanks

Look in your inbox, Just sent you a PM

[scottly]

I found out that the early caliper arms are shorter than the later ones, by about 1/2". I thought I could use my early finned caliper assemblies by simply using T brackets on my k7 forks. Wrong! The calipers hit the fork leg, and the adjusting screw doesn't line up. Rats!

[lordmoonpie]

The caliper arms differ in length and width over the K series they're used on. I found at least four different lengths when buying up old 750 hangers to do my setup....you need to work out what size is necessary for your project to save the $$$

[scottly]

4 different lengths?? Crap. I measured about 2.25" from the center of the K7 pivot pin to the center of the adjustment screw hole, and about 1.750" on the K1. Anyway I look at it, I need to make my own brackets, or find a K7 caliper w/bracket. I have a piece of gold rocking horse poo (right hand C bracket), if any one is interested in a parts swap.

[napoleonb]

Whilst building my CR, with a K7 as base, i encountered some problems concerning the caliper-holder lengths.
There are just so many sizes... and i also came to conclude there are diffent types and sizes of brake-disc's.

I wonderderd if the following parts are genuine kit items. (There not mine by the way)

[scottly]

None of the parts in the pics, save for the "T" bracket in the bottom one, that I posted originally, will work with K7 fork legs.

[Ricky_Racer]

Whilst building my CR, with a K7 as base, i encountered some problems concerning the caliper-holder lengths.
There are just so many sizes... and i also came to conclude there are diffent types and sizes of brake-disc's.

I wonderderd if the following parts are genuine kit items. (There not mine by the way)

Interesting. These are the third set of "CFC" brackets to show up on the board lately. My bracket matches the pics even to the offset upper hole... Does anyone have any info on these?  RR

[napoleonb]

If i am making a mess of this topic please tell me or redirect my post in a fresh topic.
The pics of the brackets and calipers showed below are soon to be mine.



These brackets don't show "CFC" on them and are supposed to be K0/1/2 items.
I honoustly don't know what to make of them, taking in calculation that the pics i showed previously look thus like them except for the "CFC" markings.

And while we are on the subject of brakes and minute (well sometimes) differences can anybody show me a early type of K0 caliper.
Allegedly those had different styles of cooling fins on them.

[Tom]

And while we are on the subject of brakes and minute (well sometimes) differences can anybody show me a early type of K0 caliper.
Allegedly those had different styles of cooling fins on them.

The very early sandcast and K0 caliper back had a long fin in the centre of the back. The two Allen head bolts are different and another thing to look for is the casting batch number in the lower front of the caliper you will see the word tokio with a number 1 and the early ones were silver hope that may help Tom

[srook]

The original Kit brackets from Honda have the extra tab at the back to accomodate the brake line holder.  The CFC brackets do not have this.  The bracket without any markings is not an original kit item either as it doesn't have the tab at the back for the brake line holder.  There was a really good picture of one of the Daytona CR bikes in the December, 2001 issue of Classic Bike that showed the right side of the bike.  The bracket used on those bikes is exactly the same as the stock bracket in that it even has the fender mounting boss at the front to accomodate the CR fender bracket.  In that same issue is a picture of Dick Mann on his CR flanked by Gene Romero and Don Castro on their Tridents in the winners circle at Daytona.  You can clearly see that extra caliper and bracket with its front fender mounting boss and the brake line holder at the back.  

The CR Kit.  You can see the kit bracket with the extra tabs on the right side next to the forks.


CFC must have been an aftermarket supplier of brackets for dual disk conversions but probably didn't sell them directly to the public.  Dunstall offered a dual disk conversion as an option on their CB750/900 bikes.  They used a fiberglass fender that mounted with hose clamps so there was no need for the extra mounting boss at the front.  The CFC bracket could be a part of that or any of the other cafe racer kits out there at the time.  Their were a bunch of small companies offering cafe conversions for the CB750.
Scott

[Phil]

Thanks guys - I never realised it was so tricky - makes the installation of the £2500 rear brake drum simple! It appears I have K7 forks and the early finned callipers seem to fit OK on whatever brackets I have. The right-hand C-bracket needs to be shimmed on the fork bottom. Everything seems to line up and the callipers don't quite hit. Does this look OK? (I am waiting for my super-duper trick iron discs to arrive from CAT Engineering now).

[Phil]

Sorry - it's a T-bracket, not a C-bracket!

[754]

Lordmoonpie, if they ran your part on a CNC, they needed to make a program, hence the cost.
 If they still have the program, they should be able to run 10 or more, in the neighborhood of 50.00 per or less.

 At least that should be possible on CNC mills in most cases..

[kos]

Guys, enough about what is what...here is the REAL DEAL. Just received from Bob Hansen, Team Honda Manager, Dick Mann Daytona 200 winner. A real CR kit brake arm holder and shown next to it is the OEM left side holder.


They had mounts for fender and brake line.


nuff said.

KOS

[napoleonb]

Mark, great gratitute for the shown pictures of the kit brackets.
I already switched from K7 to K2 braking calipers for my CR project and will try to reproduce a correctly styled bracket on the CNC mill.
Does anybody here have experience with welding a front fork leg?