Topic: Cheap TLS rear drums!

[Big Bob]

Dennis,

What you are describing is not trail braking.  Read this:

http://www.motorcyclistonline.com/howto/street_savvy/122_0910_motorcycle_trail_braking/index.html

[paul mcgee]

you have links to the repos that you are talking about?

i was looking at using a CB77 rear on a race project.
i think that is the only TLS rear that honda made for the street

Jag, this Enfield brake has the same problem that the CB72 brake has that we were talking about last week, It's made for the wrong side of the bike, reversing it will make it trailing shoe.

Sam.

you can swap the pins and cams over to make it a twin leading plate, i done the same and put bronze bushes in, i allso made it look very much like the original cr race brake plate, i put a picture of it on one of the other posts about cr replica brake plates, works well enough.

[Sam Green Racing]

Paul, this subject has been covered in several threads. It seems the genuine replica is way out of most peoples pockets and quite a few don't even want to pay for the simple conversion that you mentioned.   (bangs head against brick wall) there again, there are not that many members that have a CR750 that will top 150mph and might need to stop in a hurry.
Do you live in Chester or Stockton on Tees as your profile states ?

Sam.

[paul mcgee]

i live in middlesbrough, i thought it was a good idea done mine two year ago, it works very well and been no bother, if you weld  the bracing in like the cr race kit item they look the part, there is a lot of work involved mind, ive coverted my old eliot milling machine in to a cnc so i might make another one on that out of t6 billet, it should be less work and ill have the programe for more if need be,

[paul mcgee]

modified enfield tls

[Sam Green Racing]

Paul, the reason I asked where you were is that there is another Paul McGee in Chester that has a genuine period CR750.
Your brake looks OK and is much like the one that was fitted to the bike that I built but people don't seem to understand that the cam and pivot points have to be switched on brakes that were originally fitted to the left side of the bike.
If you can reproduce your brake, there might be a few shillings in it for you.

Sam.

[paul mcgee]

dont tell me there are people actualy fitting them as a twin trailing shoe, dear god,

[Sam Green Racing]

To some people, if it looks cool it's OK. Why do people fit ARD magnetos when they can buy a new elctronic ignition that is ten times better ?

Sam.

[Sam Green Racing]

And don't ask me why I built a CB750A drag bike when I could buy a Hayabusa for the same money.

Bill's first round win

Sam.

[paul mcgee]

what sort of spec is that bob,

[lordmoonpie]

Paul, the reason I asked where you were is that there is another Paul McGee in Chester that has a genuine period CR750.
Your brake looks OK and is much like the one that was fitted to the bike that I built but people don't seem to understand that the cam and pivot points have to be switched on brakes that were originally fitted to the left side of the bike.
If you can reproduce your brake, there might be a few shillings in it for you.

Sam.

That's Paul McGhie I think Sam - he's a self confessed computer luddite too so don't expect we'll ever see him around these parts. He's not an international information technology superhighway t'interweb silver surfer like you

[Sam Green Racing]

I ain't got no silver Mr Pieface. in fact, I ain't got anything to be any colour.

Sam.

[lordmoonpie]

I ain't got no silver Mr Pieface. in fact, I ain't got anything to be any colour.

Sam.

Ah sorry Lord Baldemort - I forgot

[jaguar]

modified enfield tls

care to share some details of that rear brake?

[napoleonb]

Currently i am working on my rear brake.
I've read along with several discussions about a cheap 2ls rear brake and know that converting our rear brake into one can be quite an ordeal.
My 2 cents on the subject are:

a CB350 is supposed to have a 2ls 180mm front brake (which is located on the "wrong" side and thus unsuitable).
However what if the brakeshoes aren't rotated clockwise around the axle but are mirrored as it were just put the levers and bevels in from the other side.
You still keep the 2ls function but you have to modify the brake panel quite a bit, but you can use the brakeshoes and the linkages.


I am asking this because i do have to weld a cable connection to my CB750 rear brake plate and when i am in te process of welding this is in my opinion a doable extra.
What do you guys recon?

[754]

 Show me an E ignition that looks even a 1/4 as cool as an ARD mag...

[paul mcgee]

i have actualy produced another twin leading rear brake, the first one pictured is hand made using a royal enfield plate, i have now produced one machined from t5 billet, i have designed it to be as much like the genuine cr plate as pos using the standard drum,with vent as well, i nearly have a third finished pictured still atached to the block it was machined from, which i will sell if your intrested, also i would sell the original modified enfield item,

[paul mcgee]

the machine lines polish out if prefered, the royal enfield brake plate pictured early in this post is now surplus to requirments,, also i am machining another one from t5 billet at the moment which will also be for sale, i will make one or two a year after that if any one is intrested,

[Retro Rocket]

Nice work Paul....

[freedomgli]

For clarity.........a HONDA CB450 TLS drum and brake-plate is larger in diameter than the CB72-CB77 brake. The 450 hub is a 36-spoke design and was used on the '66 & '67 CL77.  The same size brake and hub was also used on the front of the 3 models but with 40-spokes.

I thought the CB450 TLS front drum brake is exactly the same 200mm diameter as the CB77 Superhawk TLS front drum brake with the only substantive difference between the two hubs being the CB450 is 40 spoke and the CB77 is 36 spoke?  I was unaware of a >200mm TLS drum brake with only 36 spokes factory fitted to the CB450.

[Old Scrambler]

The 36-spoke units were used on the rear.....40s on the front.

[freedomgli]

Thanks old scrambler!

[fastbroshi]

Is there such a thing as brake porn?   

[johno]

Hi Guys,
when I was a boy discs were for cars, when hustling for a better brake combo we used two simple steps.

1. if you could get the wheel to lock up it was big enough.

2. Adjust the hub lever length and foot lever length ( mechanical advantage ) to get the best feel for you.

Go to the track and give it all, the value of anything becomes very clear when your drifting and sliding all over the track, thats what makes it fun.

[fang]

Bumping up an old topic. 
I recently restored a cute little 1967 Yamaha YCS1c, a 180cc 2-stroke. 
 (HERE's a link my to restoration thread at different forum.)


 After a conversation with a friend who is trying to build/restore some vintage Yamaha TZ race stuff, we realized my 2LS front drum is on the right side.  After a bit of research it looks like most of the 1960's Yamahas with 2LS front brakes were on the right side. 

Here's mine:

You can click the pic for a macro view in a new tab.
I have not had a chance to measure the brake's diameter, but I am guessing my is about 160mm, and is of course is not vented.
While this is nothing like a CR750 drum, looking in this direction might help folks who are looking for a 2LS rear drum, but are not fixated on a 'correct' CR one.

Here is the interesting hub my buddy has:



CLICK HERE for more info.  (jump to another forum)

He said the inner brake's part numbers indicate his is the same backing plate as this:

I am not sure -- is that a Yamaha 1969-yz6 works racer?
He can't tell if his hub is a factory setup or if it was just modified very well.  On his brake the fork stop was cut and filled-in, with a stud in its place for the brake stay.  The speedo (along with its grease/Zerk fitting) was also removed and back-filled.  His is painted black, so welding and filling could be present, but hidden. 

The outer drum appears to be the same as a standard Yamaha R5 -  the precursor to the RD350.  These drums were used on many of the 1960's Yamaha's rear brakes.  Together they make a right-side 40 spoke, 2LS rear hub.

 I may not have all my facts correct, but it should be ore or less pretty close   

Anyway, I saw those pics and thought of this conversation.  I am thinking about looking more closely at these 1960's Yamaha right side 2LS front brakes as potential performance upgrades for some of my other vintage go-fast stuff's rear brakes.  But not for the CR build.


peace and grease,
-Steve