68 front end size - Triumph Forum: Triumph Rat Motorcycle Forums
Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 30 (permalink) Old 11-27-2012, 05:55 PM Thread Starter
New Member
Minitwins
Main Motorcycle: 68 triumph bobber
 
Join Date: Nov 2012
Location: New Jersey
Posts: 11
68 front end size

I'm new to triumphs and a new owner/builder. I just picked up a 68 bonneville 750, and want to start working on this as a winter project.
The motor is good, and sitting in a ridged bolt on. Main issue is the tins, I guess the guy wanted a Harley so he tossed a fat low rider tank and a pan style fender with a big 2 up seat on this 68.
I'm pulling all the ****ty tins off and gonna put a triumph tank, smaller rear fender and solo spring seat.
I'm looking around for front ends, maybe a springer if I find one. My question is what size front ends will fit in the 68 neck?
Please be kind cause plenty of stupid questions will be coming forth from me.
Cash43 is offline  
Sponsored Links
Advertisement
 
post #2 of 30 (permalink) Old 11-27-2012, 09:08 PM
Senior Member
SuperSport
Main Motorcycle: 1978 Bonneville T140V
 
Morris the Cat's Avatar
 
Join Date: Feb 2008
Location: Farmington,Connecticut
Posts: 1,075
Cool

Quote:
Originally Posted by Cash43
68 bonneville 750
Not sure about the front -end but a '68 and a 750 cc engine is not the norm.

Aftermarket hop-up kit or more modern(?) engine?

Some pictures of what you have might help. . .

http://www.jockeyjournal.com/, might be of more help with this kind of question, or at least, good reference and reading material.

http://farm3.staticflickr.com/2880/9419068358_fe3bbd6508_t.jpg
Morris the Cat is online now  
post #3 of 30 (permalink) Old 11-27-2012, 10:21 PM Thread Starter
New Member
Minitwins
Main Motorcycle: 68 triumph bobber
 
Join Date: Nov 2012
Location: New Jersey
Posts: 11
From what I've read the 68 T120r came in a 750cc
Cash43 is offline  
post #4 of 30 (permalink) Old 11-28-2012, 08:54 AM
Lifetime Premium
Site Supporter
Team Owner
Main Motorcycle: 1968 Bonneville T120R
 
68T120R's Avatar
 
Join Date: Jun 2010
Location: Denver, Colorado
Posts: 4,991
Other Motorcycle: 2010 Jet Black T100
Extra Motorcycle: 2013 Black Tiger 800
Garage
I am curious where you read Triumph made a 750cc T120R in 1968? I am certainly not familiar with that being the case and I have read a lot about 1968 T120R's since I have one. I don't believe Triumph produced a 750cc Bonnevillle until the early 70's.

Front tire size for a 1968 T120R is 3.25 x 19 and rear is 4.00 x 18 per the owners manual.

Bob

Nulli Secundus

Last edited by 68T120R; 11-28-2012 at 08:57 AM.
68T120R is online now  
post #5 of 30 (permalink) Old 11-28-2012, 09:02 AM
Senior Member
SOTP Vintage Series
Main Motorcycle: T140 E
 
Join Date: Jun 2009
Location: Reading Berks UK
Posts: 6,977
Other Motorcycle: 56 Plunger Tatty Cub
Extra Motorcycle: CZ winter bike
I assume that you have a converted 650.

After market suppliers sold bar barrel and piston kits, the idea was pinched by Triumph, and in the early 70's the T140 was born.
or you have a genuine T140 engine in an earlier frame.

Post pictures of the engine number/frame and someone can tell you

The front ends between the non OIF and OIF bikes are not the same but I believe that the T150/60 yokes fit the earlier frames.
DAVE M is online now  
post #6 of 30 (permalink) Old 11-28-2012, 09:19 AM Thread Starter
New Member
Minitwins
Main Motorcycle: 68 triumph bobber
 
Join Date: Nov 2012
Location: New Jersey
Posts: 11
The engine number is T120r du76543
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	144
Size:	75.2 KB
ID:	57479  
Cash43 is offline  
post #7 of 30 (permalink) Old 11-28-2012, 09:28 AM Thread Starter
New Member
Minitwins
Main Motorcycle: 68 triumph bobber
 
Join Date: Nov 2012
Location: New Jersey
Posts: 11
Here's the frame (working off iPhone so not sure if pics are loading correct)
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	188
Size:	86.5 KB
ID:	57480  
Cash43 is offline  
post #8 of 30 (permalink) Old 11-28-2012, 09:37 AM
Senior Member
SuperStock
Main Motorcycle: 1971 Bonneville
 
therabbithole's Avatar
 
Join Date: Nov 2010
Location: Columbus, OH
Posts: 208
Other Motorcycle: 1962 T100SS
Extra Motorcycle: 1972 TR6R
did the previous owner tell you it was a 750? closer-up pictures might help some of the more knowledgeable folks tell you if the barrels were aftermarket displacement upgrade. or maybe it's still the original 650...

your forks look like they're already 73-or-later (disc brake and one-piece aluminum legs) so you might already have non-original triples, too. i suspect more pictures would help in that regard as well.
therabbithole is offline  
post #9 of 30 (permalink) Old 11-28-2012, 09:55 AM
Senior Member
Supersport 600
Main Motorcycle: T140V Bonny '77
 
obollox's Avatar
 
Join Date: Aug 2010
Location: Takasaki, Gunma, Japan
Posts: 161
Other Motorcycle: T120R '71
Where did your info come from? I think you will find the 750s were first produced in 1973 and were actually 724cc. Why do you think yours is a 750?
obollox is offline  
post #10 of 30 (permalink) Old 11-28-2012, 10:10 AM Thread Starter
New Member
Minitwins
Main Motorcycle: 68 triumph bobber
 
Join Date: Nov 2012
Location: New Jersey
Posts: 11
I know the front end is newer, off a Honda I believe... As far as it being a 750cc I'm going off what the seller stated. I just picked it up a few days ago so I haven't ripped into it much
Cash43 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Triumph Forum: Triumph Rat Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter your valid email address, that can receive an automated confirmation message. Otherwise, you won't be able to gain full access.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
GT Front spring size taximan62 Sprint Forum 3 06-15-2012 04:24 AM
front sprocket nut size Andy-Brad Triumph SuperSports 1 05-25-2011 07:01 AM
Front tyre size oz. Trophy 0 12-12-2010 03:44 PM
Front stand pin size? KVT Sprint Forum 8 08-04-2010 06:33 PM
front axle size farmhand777 Speed Triple Forum 1 10-19-2006 12:29 AM

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome