|
|
| Author |
Message |
| smithyithy |
This post is not being displayed .
|
 smithyithy Spanner Monkey

Joined: 15 Feb 2013 Karma :     
|
|
| Back to top |
|
You must be logged in to rate posts |
|
 |
| kestrel |
This post is not being displayed .
|
 kestrel Nearly there...

Joined: 04 Sep 2006 Karma :   
|
|
| Back to top |
|
You must be logged in to rate posts |
|
 |
| smithyithy |
This post is not being displayed .
|
 smithyithy Spanner Monkey

Joined: 15 Feb 2013 Karma :     
|
|
| Back to top |
|
You must be logged in to rate posts |
|
 |
| Ariel Badger |
This post is not being displayed .
|
 Ariel Badger Super Spammer

Joined: 02 Dec 2006 Karma :     
|
|
| Back to top |
|
You must be logged in to rate posts |
|
 |
| smithyithy |
This post is not being displayed .
|
 smithyithy Spanner Monkey

Joined: 15 Feb 2013 Karma :     
|
|
| Back to top |
|
You must be logged in to rate posts |
|
 |
| Vincent |
This post is not being displayed because the poster is banned. Unhide this post / all posts.
|
 Vincent Banned

Joined: 16 Oct 2006 Karma :    
|
|
| Back to top |
|
You must be logged in to rate posts |
|
 |
| Kickstart |
This post is not being displayed .
|
 Kickstart The Oracle

Joined: 04 Feb 2002 Karma :     
|
|
| Back to top |
|
You must be logged in to rate posts |
|
 |
| kestrel |
This post is not being displayed .
|
 kestrel Nearly there...

Joined: 04 Sep 2006 Karma :   
|
 Posted: 23:25 - 17 Aug 2013 Post subject: |
 |
|
| Vincent wrote: | It's quite often just as easy to transplant the entire front and rear ends. Steering stems can be swapped over and swingarm pivot widths are similar on a lot of bikes.
It's a nice way to transform a skinny wheeled classic into a more "modern" looking bike too. |
Swapping an entire front end is the easiest option, that way everything fits and works together. Unless you particularly wish to alter the geometry/handling of the bike then the replacement front end needs to be of the same length as the original. As Vincent says, steering stems can often be pressed out and swapped from one set of yokes to the other, if they are a similar length then it may just require a bearing change, worst scenario is that you will need to have a stem machined.
Swingarm changes can be much more involved. Firstly to retain handling characteristics you need a swingarm of a similar length, measured between the pivot tube and the axle slots. There are very few swingarms with the same pivot tube width. If the new swingarm pivot tube is narrower than the original then it can be fitted with suitable spacers, if it is wider then you need to either shorten the pivot tube or widen the frame by trimming the bosses, or a combination of both. Then comes the pivot tube bearings, spacer tube and pivot spindle, which are seldom the same diameters on different swingarms. If you're changing a monoshock swingarm then there will also be issues to overcome with linkage mounts.
If you're swapping rear swingarm/wheel to increase tyre width on an old classic then be aware that a fitting a much wider tyre than standard will almost certainly result in clearance issues between the chain and the tyre sidewall. The only way to remedy this is to move the front sprocket, either by spacing or fitting a dished sprocket. You can only move a front sprocket by a relatively small amount after which you need to consider an outrigger bearing setup to take the increased side load off the output shaft bearing.
Anything is possible if you have the resources or deep enough pockets. ____________________ Isle of Man.........Road Racing Capital Of The World |
|
| Back to top |
|
You must be logged in to rate posts |
|
 |
Old Thread Alert!
The last post was made 12 years, 202 days ago. Instead of replying here, would creating a new thread be more useful? |
 |
|
|