Another YZ250 project - Conversion?!

Derick5
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Derick5 12/30/2014 4:42pm
12/30/2014 4:42pm
rcannon wrote:
If you have to do something crazy, use the 2009 swingarm. I would imagine it to be amazing with the older, steel frame. You'd get some...
If you have to do something crazy, use the 2009 swingarm. I would imagine it to be amazing with the older, steel frame. You'd get some of the weight loss, too, if you use the 2009 rear wheel. The 09 hub is much smaller, and lighter.

I cant imagine why Yamaha did nto do this to the 2015 yz, other thna maybe no money was availabel to" test it" the way they do. Its abetter arm, for sure, and I dont think any rider woudl like it.





2009 swingarm? Off of the 2009 YZ250 or the 2009 YZ450F? Don't know if it would bolt up, or the shock linkage would work?
RandyS
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RandyS 9/17/2016 10:18pm
9/17/2016 10:18pm
Bringing this back from the dead. After sitting on it for almost 2 years I'm finally working on my 03 YZ250. Last night in a fit of why the hell not I bought a 12 450F swingarm off Ebay. From what I've been able to figure out with the steel frame you can use the at least the stock dogbone if not complete linkage with the new swingarm whereas the aluminum frame needs at least some of the new parts. The stock linkage will lower the rear slightly but keep close to the same leverage ratios, I'm building it for a mostly off road bike so that's not really a bad thing, however it seems like maybe I might have some tire rub issues. Anyone done it on a steel frame, of have any additional knowledge. Most of the threads I could find ended 2 or 3 years ago.
smezmx
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smezmx 9/18/2016 1:39am
9/18/2016 1:39am Edited Date/Time 9/18/2016 1:42am
RandyS wrote:
Bringing this back from the dead. After sitting on it for almost 2 years I'm finally working on my 03 YZ250. Last night in a fit...
Bringing this back from the dead. After sitting on it for almost 2 years I'm finally working on my 03 YZ250. Last night in a fit of why the hell not I bought a 12 450F swingarm off Ebay. From what I've been able to figure out with the steel frame you can use the at least the stock dogbone if not complete linkage with the new swingarm whereas the aluminum frame needs at least some of the new parts. The stock linkage will lower the rear slightly but keep close to the same leverage ratios, I'm building it for a mostly off road bike so that's not really a bad thing, however it seems like maybe I might have some tire rub issues. Anyone done it on a steel frame, of have any additional knowledge. Most of the threads I could find ended 2 or 3 years ago.
http://www.thumpertalk.com/topic/824371-swing-arm-swap-question/page-1?…

If you look you can also find additional links to this subject on this thread for more info.
pete24
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pete24 9/18/2016 7:34am
9/18/2016 7:34am
my 12 with the vlarr tank


my 11 hurricane


my 09 hurricane

my 16

my 99


ive had a shit load of yz250s i still have the 99 and the 16 and an 87, granted im 53, and getting slower with every breath i take but i say dont bother with any sss stuff my 99 handles as good as my new bike and once you get a yz set up its a great bike, just clean the thing up and ride it
1

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Prairieboy43
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Prairieboy43 9/18/2016 11:00am
9/18/2016 11:00am
Crush wrote:
I'd do SSS but keep the steel frame...
X2. Best frame ever. McGrath, Henry, Reed, Dowd, Bradshaw, Button, all won with steel frame. Only became better with more input, and Engineers listening to reports. Implementing small changes. Cool
potatoflake
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potatoflake 6/28/2017 1:41pm
6/28/2017 1:41pm Edited Date/Time 6/28/2017 1:42pm
BeAutiful bikes!!

Hopefully getting my own steely and some cash on the 4th for my kx250f and I'm for sure gonna want to do sss
Joko
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Joko 6/28/2017 1:57pm
6/28/2017 1:57pm
Matthes noted on the last #300 pulpcast that they were stretching the YZ steel frames quite a bit, was that a noticeable problem for high/time or severe-use bikes?

Pit Row

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