Vintage Dirt Bike Q & A

Anything and everything about Vintage Dirt Bikes! After you Register, email nathan@alp-sys.com and let me know so I can activate you.
It is currently Thu Jun 19, 2025 5:48 am

View unanswered posts | View active topics


Board index » Questions & Answers » Honda CR, MR & MT

All times are UTC - 7 hours [ DST ]



Post new topic Reply to topic  Page 1 of 1
  [ 8 posts ] 
  Print view Previous topic | Next topic 
Author Message
stou
PostPosted: Sat Apr 06, 2013 3:47 pm 
Offline
User avatar

Joined: Mon Jan 07, 2013 8:16 am
Posts: 63
There's a missing rear brake stopper arm on the 1974 CR125M that I work right now. Can someone tell me the lenght of this arm between the center of the 2 holes?

(part #3 in yellow on the picture)

Thanks!


Attachments:
swingarm_parts.JPG
swingarm_parts.JPG [ 47.59 KiB | Viewed 7369 times ]

_________________
1974 Honda CR125M - 1977 Honda CB750 - 1982 Yamaha XT550 - 1986 Honda TLR200 - 2016 Honda CRF1000L Africa Twin- 2012 Ossa TR280i
Top
 Profile  
 
rayivers
PostPosted: Sat Apr 06, 2013 5:37 pm 
Offline

Joined: Sun Nov 30, 2008 12:10 pm
Posts: 1010
Location: Connecticut, USA
14.25" between bolt centers.

Ray

_________________
'74 CR125M (175cc), '75 MR175, '82 RM250Z, '08 YZ250F, '14 Zero FX electric, '14 Zero MX electric, '18 Alta MXR electric
Top
 Profile  
 
stou
PostPosted: Sat Apr 06, 2013 5:49 pm 
Offline
User avatar

Joined: Mon Jan 07, 2013 8:16 am
Posts: 63
Thanks, I'll made one of the right size!

_________________
1974 Honda CR125M - 1977 Honda CB750 - 1982 Yamaha XT550 - 1986 Honda TLR200 - 2016 Honda CRF1000L Africa Twin- 2012 Ossa TR280i
Top
 Profile  
 
ohiomotoxer
PostPosted: Sat Apr 06, 2013 9:22 pm 
Offline

Joined: Thu Jan 03, 2013 6:30 pm
Posts: 89
I know Im a goofball with doing crazy things to my bikes but I made an aluminum one that went straight down from the bottom shock bolt, simply because the Red-Line swingarm I ran didnt have a front brake arm mount.

I saw something similar on Marty Smiths bike at Mid Ohio in 75


Attachments:
DSC00001.JPG
DSC00001.JPG [ 867.11 KiB | Viewed 7361 times ]
marty_smith_rc_125_002.jpg
marty_smith_rc_125_002.jpg [ 50.65 KiB | Viewed 7361 times ]

_________________
1994 AHRMA National Champion Sportsman 125 Intermediate.
1996 AHRMA National Champion Classic 125 Expert.
Top
 Profile  
 
rayivers
PostPosted: Sun Apr 07, 2013 4:00 am 
Offline

Joined: Sun Nov 30, 2008 12:10 pm
Posts: 1010
Location: Connecticut, USA
Quote:
I made an aluminum one that went straight down from the bottom shock bolt

I did nearly the same thing (very similar to your 2nd photo) and it seemed like the rear wheel hopped less under braking than with the stock setup. If I go with a custom arm I'll definitely be using the shorter brake stay.

Ray

_________________
'74 CR125M (175cc), '75 MR175, '82 RM250Z, '08 YZ250F, '14 Zero FX electric, '14 Zero MX electric, '18 Alta MXR electric
Top
 Profile  
 
stou
PostPosted: Sun Apr 07, 2013 5:05 am 
Offline
User avatar

Joined: Mon Jan 07, 2013 8:16 am
Posts: 63
Interesting! But to do that I will need to remove the already painted swingarm to weld an attachment for the arm and then paint it again.

Nice bike rayivers!

_________________
1974 Honda CR125M - 1977 Honda CB750 - 1982 Yamaha XT550 - 1986 Honda TLR200 - 2016 Honda CRF1000L Africa Twin- 2012 Ossa TR280i
Top
 Profile  
 
rayivers
PostPosted: Sun Apr 07, 2013 6:49 am 
Offline

Joined: Sun Nov 30, 2008 12:10 pm
Posts: 1010
Location: Connecticut, USA
Quote:
to do that I will need to remove the already painted swingarm

I just drilled a hole in the swingarm gusset, slightly below the bottom front of the shock mount. I shortened a spare brake stay, flattened & drilled one end, bent it to fit, and that was that; used it for years with no problems at all.

Ray

_________________
'74 CR125M (175cc), '75 MR175, '82 RM250Z, '08 YZ250F, '14 Zero FX electric, '14 Zero MX electric, '18 Alta MXR electric
Top
 Profile  
 
stou
PostPosted: Sun Apr 07, 2013 7:25 am 
Offline
User avatar

Joined: Mon Jan 07, 2013 8:16 am
Posts: 63
I'll see if I can do something similar on the stock swingarm.

Thanks Ray!

_________________
1974 Honda CR125M - 1977 Honda CB750 - 1982 Yamaha XT550 - 1986 Honda TLR200 - 2016 Honda CRF1000L Africa Twin- 2012 Ossa TR280i
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 1 of 1
  [ 8 posts ] 

Board index » Questions & Answers » Honda CR, MR & MT

All times are UTC - 7 hours [ DST ]

Who is online

Users browsing this forum: No registered users and 25 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group