KX150-AF 2016

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11/14/2015 2:23 PM

Hi, thought I could share my new build with you.

This will be a version 2 of my earlier build:

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Here I have used a KX250F 2010 frame, 2013 subframe. I've had the bike like this for 2 years and ben planning an update for a while.... I'm not a big fan of the extra length welded to the rails so I had new rails bent for the new frame.

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Last race of the year I had this happend:

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So now I will have the engine rebuilt with some changes from last year.

Starting to work with the new frame I got, KX250F 2014

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And here is the finished frame

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Now I'll start to assembly it. Feel free to ask if you have any questions!

Regards, Jimmy


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11/14/2015 2:32 PM
Edited Date/Time: 11/23/2015 12:19 PM

Today I got the Ti footpegs in place

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Started to have a look at the rear brake lever as well, but I'm waiting for a silver anodized tip for it.

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Next I will munt the Xtrig triple clamps, but I'm waiting for new bearings for it. As soon as I get them I should be able to mount the whole front end!

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11/14/2015 2:39 PM

You said it's a 150, so bored or stroked? Did you port it?

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11/14/2015 2:52 PM

Sick boy!! I follow this project a lot! And when it will be finished I will share on my Facebook page "125 ONLY 2 Stroke" I really like it!

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11/14/2015 2:54 PM

colintrax wrote:

You said it's a 150, so bored or stroked? Did you port it?

Running 58mm bore so its actually a 144cc.

Ported mid-top by PBR racing here in Sweden, Vertex KTM flat head piston, VHM head with 13.40cc insert, V-force 2 reeds and a Keihin 38mm PWK airstryker carb. HGS 144 exhaust.

New for next year will be a VHM high inertia crank balanced with the heavier piston.

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11/14/2015 4:08 PM

Very cool!!!! Going for a black or green theme?

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11/14/2015 4:12 PM

looking good.
nice shop too!

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-'09 KX500AF

- '19 KX450F

11/14/2015 5:33 PM

What bend renthals are you running in the first pic?

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11/15/2015 12:51 AM

pCp 252 wrote:

What bend renthals are you running in the first pic?

It's the 999 bend.

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11/15/2015 12:56 AM

Awesome! Thanks for sharing!

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Cheers, Crush
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11/15/2015 1:17 AM

Very nice build. smile

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11/15/2015 2:05 AM

Cool, you last bike was awesome. Can't wait to see how this one turns out!

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#1
KX125

11/15/2015 8:51 AM

Droooollllll

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11/15/2015 8:55 AM

unique .... I like it!

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11/15/2015 9:11 AM

To the life of me why doesnt the factories build these. Cheap to produce and will sell to the poor none racer.

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11/15/2015 9:20 AM

Very very cool as always!

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It's rude to talk about religion. You never know who you're gonna offend

11/15/2015 12:06 PM
Edited Date/Time: 11/23/2015 12:21 PM

Thanks for the comments! I'll try to keep you updated. Here comes a small one

Wheels will be stock KX250F. The goal is to get it together below 90kg and getting wheels that are lighter than stock gets really expensive.

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I'm not a big fan of the feel of the stock floating brake disc in the front so I mounted a Braking disc that is a lot lighter as well.

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More to come...

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11/15/2015 12:22 PM

mmmmm wow smile

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instagram: @ginger969

11/15/2015 1:31 PM

Really nice work!

You can lace up a 1.85 X 19 rear rim and run the lighter tires intended for a 125 (the smaller profile tires). Also, you can turn down your Hubs like they do at TCR. Stock spokes & nipples are pretty damn light already.

Since its a 125, you can probably have the rear brake rotor drilled a little more and lighten it up, too. You can remove 30-50% of your brake pad material for weight savings, too. 125s usually require a lot less rear brake force.

Guts Racing seat foam is available in "light-weight", too.

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Nobody ever told me, I found out for myself. You've got to believe in foolish miracles. It's not how you play the game, it's if you win or lose. You can choose. Don't confuse. Win or lose. It's up to you!

11/15/2015 1:54 PM

TeamGreen wrote:

Really nice work!

You can lace up a 1.85 X 19 rear rim and run the lighter tires intended for a 125 (the smaller profile ...more

Thanks! The rear wheel already is 1.85.

In front I run Pirelli MX32 3640g... 200 grams lighter than Dunlop MX51 (3840)

Rear 100/90 19" Pirelli 4815g, vs Dunlop 5068g

For seat I been looking at the Think Technology foam that should save 660g(!!!) over stock. Thats a huge win high up on the bike.



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11/15/2015 1:59 PM

MotionPro Lite rim lock as well to reduce weight?

I'm surprised people don't make their own light weight seats. Would imagine it'd be a good bit cheaper.

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11/15/2015 3:58 PM

Awesome build! Great work, keep the updates coming.

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Positively, absolutely 110% obsessed with anything MOTO.

11/15/2015 4:17 PM

Killer , if I could pick any bike that would probably be it

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11/15/2015 5:40 PM

Nice project, I like it !

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Born in Prague,living in LA,so if you don't like my spelling,blow me!

21 CRF450R
16 Yamaha YXZ 1000R
17 Yamaha MT-10 FZ-10 165 Hp RWP
06 CRF450X street legal supermoto
96 CR250R smoker
2012 CR500AF
2003 KLX110 mod




11/15/2015 6:21 PM

Killer job on the frame mod Jimmy! Keep up the good work. Love these kind of builds

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11/15/2015 6:26 PM

The quality and craftsmanship are amazing but what's up with the whole weight saving thing. Seriously? Sorry guys but your wasting your time. Shaving off grams from your brake pads...lol. Your bike 2 pounds lighter isn't gonna change a thing. I'll fill your tires with lead and you won't know the difference. Better order that 8000$ Ti bolt and axle kit and only fill your gas tank 1/8тh full. 8 pounds a gallon! Yikes

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11/17/2015 6:01 AM
Edited Date/Time: 11/17/2015 6:48 AM

TeamGreen wrote:

Really nice work!

You can lace up a 1.85 X 19 rear rim and run the lighter tires intended for a 125 (the smaller profile ...more

Seriously? Shave you brake pads to save weight? Is this a sideshow?
If the op only goal is to spend 30,000$ just to see if he can build a 90kg bike then awesome have a blast. If he doing this because he thinks he gonna notice it on the track then he gonna be sad.
Im not trying to pick on just you. I see factory mechanics drilling washers to save 1 gram off a bike. It's so rediculous. There is NO WAY anyone is noticing a gram, or an even a few ounce. The first piece of dirt that sticks to your fender and your weight savings are all over.
To all the boneheads that are gonna tell me " of course I notice the weight." It must kill you to run a new tire huh? Going from a nice light worn out carcass to a fresh knob!
If someone else has a buddy claiming he notices his bike being lighter here's the best way to call bullshit. TOP OFF HIS GAS TANK. Gas is approx 8 pounds a gallon so he will be a fish out of water when he gets a fill up.

I think the craftsmanship and quality is amazing I just don't see the point of some of the work

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11/17/2015 6:28 AM

Nice job Oberg

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If you like uncle tony's meatballs, you'll love his sausage

Now that's Italian

11/17/2015 7:25 AM

I'd like to see more pictures of your shop!

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11/17/2015 7:31 AM

TeamGreen wrote:

Really nice work!

You can lace up a 1.85 X 19 rear rim and run the lighter tires intended for a 125 (the smaller profile ...more

Nesc39 wrote:

Seriously? Shave you brake pads to save weight? Is this a sideshow?
If the op only goal is to spend 30,000$ just to see if he ...more

Race gas weighs in at about 6.0-6.4 lbs a gallon. Water weighs 8

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well we ain't the smartest folks in the world...i mean we're fucking dirtbike riders for christ sakes.- BobbyM

If you chose not to decide you still have made a chioce.