ADVrider

Go Back   ADVrider > Bikes > Old's Cool > Airheads
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 09-16-2012, 02:15 AM   #1
Voltaire OP
Bored Of The Rings
 
Voltaire's Avatar
 
Joined: Jun 2011
Location: Auckland,New Zealand
Oddometer: 1,416
Rearset Brake Question

My race bike rear brake is not very good.... Its been on my to do list....
First I was thinking get the pedal and front pivot at 90 degrees.
Make the front pivot longer.
Any thoughts?
cheers.
Voltaire is offline   Reply With Quote
Old 09-16-2012, 04:41 AM   #2
pommie john
Beastly Adventurer
 
pommie john's Avatar
 
Joined: Apr 2008
Location: Brisvegas, Australia
Oddometer: 1,410
Those angles look all wrong.

The first thing I would do is shorten the rod and get the lever at the drum nearer to 90 degrees. I lengthened the arm at the brake pedal to get less pedal movement which helped a lot.
__________________
The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.
Bertrand Russell
pommie john is offline   Reply With Quote
Old 09-16-2012, 05:27 AM   #3
spo123
Man About Town
 
spo123's Avatar
 
Joined: Nov 2006
Location: North Shore Mass. USA
Oddometer: 725
Cool2 cool

Reverse the rear brake lever, facing UP....Shorten the brake rod and reform to fit.....Adjust as needed.
RELINE rear brake (and front, if required) with MODERN material.
Ride and WIN!

spo
__________________
spo
1973 /5 LWB Toaster
spo123 is offline   Reply With Quote
Old 09-16-2012, 07:28 AM   #4
Wolfgang55
Beastly Adventurer
 
Wolfgang55's Avatar
 
Joined: Dec 2006
Location: Next to Rio Bravo
Oddometer: 3,383
Question about your bike's special additions. What is that green bottle doing inside your bike's frame area just above your foot peg?

Good luck w/ your adjustments.
Wolfgang55 is offline   Reply With Quote
Old 09-16-2012, 08:24 AM   #5
rheritage
Gnarly Adventurer
 
Joined: Dec 2010
Location: Savannah, GA
Oddometer: 258
That is his oil breather catch can I think.
__________________
R75/5, R75/5 AHRMA Racer, R100CS, R100GS PD, 1150GSA, WR450, Zuma 125

R100RS Sold, R80RT Sold, 1150RT Traded, RC51 Sold, KLR685 Sold, W650 Sold, CB1100F Traded, 1100S BCR Traded
rheritage is offline   Reply With Quote
Old 09-16-2012, 09:11 AM   #6
Jon-Lars
Jon-Lars
 
Jon-Lars's Avatar
 
Joined: Apr 2006
Location: Beverly
Oddometer: 544
Quote:
Originally Posted by Voltaire View Post
My race bike rear brake is not very good.... Its been on my to do list....
First I was thinking get the pedal and front pivot at 90 degrees.
Make the front pivot longer.
Any thoughts?
cheers.

It's not the pedal/rod mounting lever angle that is important, but rather the brake rod/rod mount lever angle.

For the best transfer of force, the brake rod should be at an angle of 90 degrees to the rod mounting lever at both ends of the brake rod, at the point in the linkage movement when the brake shoes make contact with the drum.

The ratio between the foot lever length and the rod mounting lever determines the amount of effort needed to brake. If you make the foot lever longer you will have more mechanical advantage; if you make the rod mounting lever shorter you get the same effect.

When on the bike, your foot has a point in it's range of motion where you can apply the most force. Rotate the pedal so that it matches, then move the rod arms to suit. I see you have Tarozzi rearsets: ease of adjustment is their forte'.
__________________
Cheers, Jon-Lars Sorenson
Beverly, WA
http://www.facebook.com/BMWR90S

Jon-Lars screwed with this post 09-16-2012 at 11:20 AM
Jon-Lars is offline   Reply With Quote
Old 09-16-2012, 12:48 PM   #7
Voltaire OP
Bored Of The Rings
 
Voltaire's Avatar
 
Joined: Jun 2011
Location: Auckland,New Zealand
Oddometer: 1,416
Thanks guys for the input, thats tonights job....
He is a larger pic of the bike.
The Green Bottle is Liptons Tea...... I had oil get on the clutch so found some hose in the shed and a bottle in the recycle bin....we're talking budget racing here...
Voltaire is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 10:34 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014