A few ttr125 yz rear conversion updates

[lescor]

Is it necessary to weld part of the linkage solid to do this project?

To Rippn450- did you weld your linkage?

Looks like your project is coming along well. I did this mod for my son a few years ago. We ride woods and hare scrambles and its been a great bike for that. The rear shock has been a work in progress as it didn't have enough rebound dampening. here are some pics.

http://i12.photobucket.com/albums/a243/Rippn450/ttrsdeview1.jpg

http://i12.photobucket.com/albums/a243/Rippn450/ttrmastercylinder.jpg

http://i12.photobucket.com/albums/a243/Rippn450/ttrdiscbrake.jpg

http://i12.photobucket.com/albums/a243/Rippn450/ttr125mod.jpg

[Mustang_Warbird]

You don't need to weld the the TTR linkage, in fact you don't need it at all.

I went through many permutations of brackets to try and avoid welding the frame, then out of interest, I tried connecting the YZ link directly.

Found it works without any problem.

Take a look below

[fergy2]

It can't be that simple can it?? All previous "moders" indicated welding required. I was hoping there was a "non-weld" solution, sounds like there may be.

fergy

[Mustang_Warbird]

Thats what I thought.

I was actually in the process of fabricating a piece to weld in, when I thought I would give it a try.

Bolted it straight up to the TTR frame and it works.

Bike sits a little higher than it would with the link welded in, but with the front forks fully extended in the trees, it sits level.

Got about 11 inches of travel, and everything works - no problem at all and no bottoming out the rear wheel on the underside of the mud guard as some modders have mentioned.

It may change the shock geometry from that of the TTR, but from the pics and drawings I've seen, it emulates the YZ almost spot on.

[nlafond2000]

i made a bracket that bolts on to the footpegs for the master cylinder and has worked great. no welding:banana:

[fergy2]

nlafond2000,

Very nicely done, appears that you're also using the YZ foot brake which is an improvement over the TTR design. Can you provide a close-up of the "bracket" and any additional info on your design?

[nlafond2000]

http://i274.photobucket.com/albums/jj259/nlafond2000/100_3504.jpg[/img] this version of the bracket had bigger holes the revised one were a lot smaller. i also thought it might be a bit vulnerable but it's taken a beating with no issues at all.?

[nlafond2000]

http://i274.photobucket.com/albums/jj259/nlafond2000/100_3504.jpg[/img]

[nlafond2000]

http://i274.photobucket.com/albums/jj259/nlafond2000/100_3504.jpg

[nlafond2000]

it is 3/16" aluminum plate

[SMP70]

nlafond2000,

Very nicely done, appears that you're also using the YZ foot brake which is an improvement over the TTR design. Can you provide a close-up of the "bracket" and any additional info on your design?

Keep in mind that the bike he posted is a TT-R 230... not a TT-R 125. You're dealing with different dimentions between the two bikes...

[fergy2]

Mustang_Warbird,

I'm getting ready to install the big wheel swingarm and shock assembly and wanted to follow up with you to see if you have any comments or updates to your "non-weld" version as stated in your earlier response.

Any issues with your conversion? Non-weld version meets your expectations?

Fergy

[acerbis24]

I know, 3 years old, but i'm doing this mod right now and there is very little information on the results of the no weld conversion...

Is it possible?

Do you need to re-valve the rear shock?

Any stress on the frame?

Is that the YZ or TTR swingarm?

when fitting the YZ 3 bolt linkage, the triangle one, has a big gap to fill on the TTR frame. Do we just make spacers or am I going down the wrong path?

Thanks

Edited August 14, 2012 by acerbis24

[motomatt1994]

Looks like I'm behind the curve.Just decided to go big on the suspension upgrades.I had BBR springs for years.So Rippin 450,it looks as though you had the most sano shock install.The shock angle looks sooo close to what is in the YZ85.This would allow the shock to function properly for the linkage to provide correct rising rate.I've tried to access your photobucket images and the page won't load...perhaps you could renew them.Racetech will provide springs for up to 185#,Poweroll in Oregon has 160cc high rpm and 170cc stroker torquer builds. Why put all thaat suspension on and leave the motor stock??

[603rider]

Mustang_Warbird,

I'm getting ready to install the big wheel swingarm and shock assembly and wanted to follow up with you to see if you have any comments or updates to your "non-weld" version as stated in your earlier response.

Any issues with your conversion? Non-weld version meets your expectations?

Fergy

Did anyone find out how it rode without the welding option?

[haydug]

Just finished the suspension on this one. Now onto the engine.