2009 YZ250 Crazy Rebuild

mxteach
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mxteach
Edited Date/Time 4/24/2021 4:25pm
I have a 2009 YZ 250 and it was in need of a rebuild so I went a little overboard........

CRM Carbon Tank
CRM Carbon Subframe
Lots of Ti Bolts
YZ450 Rear SwingArm Conversion

And Much more!

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1
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Zesiger 112
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Zesiger 112 2/17/2021 11:46am
2/17/2021 11:46am
Awesome! Give us the good stuff, some shots of that subframe and tank without the seat on.
And if you ever have the chance I’d like to know what that subframe weighs.
HackMan162
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HackMan162 2/18/2021 12:02pm
2/18/2021 12:02pm
She's a beaut, Clark!
3
TunaBro
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TunaBro 2/18/2021 4:02pm
2/18/2021 4:02pm
Would you look at that!
cdoggy81
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cdoggy81 2/18/2021 10:37pm
2/18/2021 10:37pm Edited Date/Time 4/21/2021 8:25am
Zesiger 112 wrote:
Awesome! Give us the good stuff, some shots of that subframe and tank without the seat on. And if you ever have the chance I’d like...
Awesome! Give us the good stuff, some shots of that subframe and tank without the seat on.
And if you ever have the chance I’d like to know what that subframe weighs.
Yeah, what he said ^ 😎
For real though, bad ass!
Who did you get the team modified swingarm from? Starts with J & ends with R?

The Shop

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mxteach
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mxteach 2/19/2021 2:58pm
2/19/2021 2:58pm
I got it from a now defunct race team....
2
mxteach
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mxteach 2/19/2021 3:00pm
2/19/2021 3:00pm
Zesiger 112 wrote:
Awesome! Give us the good stuff, some shots of that subframe and tank without the seat on. And if you ever have the chance I’d like...
Awesome! Give us the good stuff, some shots of that subframe and tank without the seat on.
And if you ever have the chance I’d like to know what that subframe weighs.

17
Mr. Robinson 2/19/2021 3:26pm
2/19/2021 3:26pm
How I would love to have that on my bike. Woohoo
3
cdoggy81
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cdoggy81 2/19/2021 9:42pm
2/19/2021 9:42pm Edited Date/Time 4/21/2021 8:26am
Yep, roger that. It was who I thought you got it from as they were the big team doing that extra plate at the time.

Agree Mr Robinson! I love that carbon subframe! So bad a$$!!! Would love to see how much it weighs compared to stock.
mxteach
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mxteach 2/20/2021 12:17pm
2/20/2021 12:17pm
As soon as I find a scale I will
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cdoggy81
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cdoggy81 3/25/2021 9:11am
3/25/2021 9:11am
You ever find a scale.... 😎
mxteach
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mxteach 3/25/2021 9:22am
3/25/2021 9:22am
cdoggy81 wrote:
You ever find a scale.... 😎
Yes! We found a nice digital animal scale and was able to get the whole bike on it last week.

FULLY FUELED and ALL Fluids......

201.3!!!

Can totally feel it on the track.

Next is the lighter seat, and maybe Ti Spokes....

See if can break 200.....

11
Mr. Robinson 3/25/2021 11:56am
3/25/2021 11:56am
I think a Ti shock spring would get you there.
1
Zesiger 112
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Zesiger 112 3/26/2021 2:47pm
3/26/2021 2:47pm
Wow, never would have guessed it was that light
mxteach
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mxteach 3/26/2021 6:24pm
3/26/2021 6:24pm
Yeah I agree. Measured it a few times to check it.......craziest part is it is having to relearn how to ride it. The power band kicks in and it wants to launch away....lol......Looking forward to first full race test next weekend at Budds Creek
3
adam8781
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adam8781 3/26/2021 9:41pm
3/26/2021 9:41pm
200 lbs, jessssusssss that would feel like a 125
1
cdoggy81
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cdoggy81 3/27/2021 9:23am
3/27/2021 9:23am Edited Date/Time 3/27/2021 9:24am
I can see the big stuff you used to save weight ( like the tank, subframe, swingarm conversion, tires, triple clamps, ti pegs & bolts, etc.) but what else did you do to get the weight down? Did you run UL tubes, ti axles or pivot bolt, ti shock spring, seat foam? A few things are working against you like the wheels, clutch & ignition cover, frame cover but to be at 201 is just awesome! You can easily get below 200 with a few little tweaks 😎
mxteach
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mxteach 3/28/2021 5:29am
3/28/2021 5:29am
cdoggy81 wrote:
I can see the big stuff you used to save weight ( like the tank, subframe, swingarm conversion, tires, triple clamps, ti pegs & bolts, etc.)...
I can see the big stuff you used to save weight ( like the tank, subframe, swingarm conversion, tires, triple clamps, ti pegs & bolts, etc.) but what else did you do to get the weight down? Did you run UL tubes, ti axles or pivot bolt, ti shock spring, seat foam? A few things are working against you like the wheels, clutch & ignition cover, frame cover but to be at 201 is just awesome! You can easily get below 200 with a few little tweaks 😎
Subframe bolts, Sprockets bolts, TI Shock Spring. Also used Carbon Fiber head stays, And few other CF pieces.
Drilled washers, ti seat brackets, ti air filter bolt.


I did not do the axles (I read a lot of conflicting experiences (breaking/freezing) and they are stupid expensive.
Like the cost for the front and rear axles is more than I paid for all the CF parts.

I will see how it goes this season and maybe next do the last bits to see how low it can go.
1
cdoggy81
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cdoggy81 3/28/2021 6:12am
3/28/2021 6:12am Edited Date/Time 3/30/2021 5:45pm
Nice & makes sense. You did a good job for sure👍🏻

I had a nice savings when I did both of mine. To alleviate the freezing / galling issue I went & TiN coated mine. You can also DLC coat them but I wanted the gold to pop. Never had any breaking problems. The shoulder joints just need to be machined properly. If you do ever want to get a set of titanium axles I’ll hook you up but you got to get me one of those CF subframes! Tank I don’t need but I’ve been trying to get one of those subframes for a loooong time 😎



2

Pit Row

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HackMan162
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HackMan162 3/28/2021 7:50am
3/28/2021 7:50am
Ive got Mettec Ti front and rear axles, as well as a lightspeed carbon ignition cover. Let me know if you are interested.
timobijnen84 3/30/2021 7:43am
3/30/2021 7:43am
cdoggy81 wrote:
Nice & makes sense. You did a good job for sure👍🏻 I had a nice savings when I did both of mine. To alleviate the freezing...
Nice & makes sense. You did a good job for sure👍🏻

I had a nice savings when I did both of mine. To alleviate the freezing / galling issue I went & TiN coated mine. You can also DLC coat them but I wanted the gold to pop. Never had any breaking problems. The shoulder joints just need to be machined properly. If you do ever want to get a set of titanium axles I’ll hook you up but you got to get me one of those CF subframes! Tank I don’t need but I’ve been trying to get one of those subframes for a loooong time 😎



There was a YZ carbon subframe for sale locally for 350 euro's and i didnt do it at the time and i still hate myself for it.Sad
1
okieonayamaha 4/1/2021 8:33pm
4/1/2021 8:33pm
Man I'd love to get a carbon fiber tank and subframe for one of my YZ 250's lol. Beautiful looking bike there!
GetItOnLikeTron 4/2/2021 2:44pm
4/2/2021 2:44pm
have been following the build and have to say you have one gnarly bike. That thing is going to fly
1
jacko337
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jacko337 4/24/2021 4:25pm
4/24/2021 4:25pm
HackMan162 wrote:
Ive got Mettec Ti front and rear axles, as well as a lightspeed carbon ignition cover. Let me know if you are interested.
sent you a pm mate
cdoggy81
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cdoggy81 6/7/2021 12:16pm
6/7/2021 12:16pm
mxteach - whats new with the bike? Hope all is well bud Cool
Zesiger 112
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Zesiger 112 1/28/2026 12:28pm
1/28/2026 12:28pm

If you ever want to sell that swingarm let me know 

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