2003 KX 125 DONE!!!

BobPA
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Edited Date/Time 4/3/2021 12:54am
My initial post will be a bit long and picture filled. The bike will hopefully be done by January or so.

I bought this bike In May of last year as basically a bone stock, unmolested 2003 KX 125. I rode it until the fall and then sent the engine out to Eric Gorr for a 144 kit. Well after 7 months of back and forth, I had myself a running 144 on full race gas. I only got about 8 hours on the bike this year and have decided to build her up.

Current plans
Touch up some cylinder port work for some more ponies
Scalvini Pipe (Ordered but will not be here until December Sad )
Green Powdercoat frame and subframe

The photos will do more explaining then my typing.....

This is how I bought it...






I will be making a custom silencer using the old school stinger tip...I have always loved the look. I got this one off of eBay for $15 from a '99 KX, and was really hoping the end cap would rivet right on to my current PC silencer. But, the bodies of the silencers are different sizes. So this is going to take a bunch of cutting and welding to make it right (more pics to come). I actually will not complete this until my Scalvini shows up, so I can mount it and get the alignment perfect.





These are my graphics. Based off of a 1989 KX, should go well with the green frame and swingarm. Also a blue seat cover.



Wheels will be stock 09+ KX hubs with a minor polish and some gold hoops. Have the rear spokes and rim, having a tough time locating a hub...







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BobPA
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10/31/2017 7:25pm
I got a set of, what I was told, were like a 'B' kit fork from a 2006 KX250f. Also the matching PC clamps for the forks. I will be making a step by step instruction on how to modify the steering stop to fit modern four stroke clamps. The DLC coating adds a nice touch.







Rebuilt the forks tonight actually. Pretty dirty inside as you can see. I called PC and they are too lazy to look up the old records, as the forks still have the name and last date of service on them. Anyone know exactly what they are?












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BobPA
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10/31/2017 7:26pm Edited Date/Time 10/31/2017 7:29pm
Using this as a base for the look

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ledger
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10/31/2017 9:22pm
I like where this is heading already, looking fwd to the....step by step steering stop modification. The green frame/ blue seat cover and graphics along with /gold rim's will make this bike a head turner, great idea and a great bike. I'm in. Wink
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KDXGarage
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10/31/2017 10:12pm
COOL! Good luck on the build. It was a very nice looking starting point!
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The Shop

RyanLester761
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11/1/2017 8:00am
I like your plan here. Classy. And some nice parts there... besides that silencer. Haha. I ALMOST considered buying that one. I watched it on ebay too.
BobPA
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11/1/2017 9:21am
Talk about a panty dropping roost bucket feeding horse power wagon.
Holy shit he signed up....
BobPA
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11/1/2017 9:22am
Thanks for the kinds words guys,

Ryan, I eye balled that silencer for a while. Trust me, it looks better in pictures than in real life haha, she is rough. No big deal though, a bit of elbow grease and a welder and she will be like new.
RyanLester761
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11/1/2017 9:29am
BobPA wrote:
Thanks for the kinds words guys, Ryan, I eye balled that silencer for a while. Trust me, it looks better in pictures than in real life...
Thanks for the kinds words guys,

Ryan, I eye balled that silencer for a while. Trust me, it looks better in pictures than in real life haha, she is rough. No big deal though, a bit of elbow grease and a welder and she will be like new.
Good luck on that. I'll be following.... Smile
RoostBuckets
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11/1/2017 10:31am
Talk about a panty dropping roost bucket feeding horse power wagon.
BobPA wrote:
Holy shit he signed up....
Just following to see what motor work you do... seeing if you'll make a faster machine then LWR#59 #roostbuckets
HenryA
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11/1/2017 12:02pm
Ooooh, this look on a KX125 is something new! Exciting stuff, good luck!
BobPA
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11/2/2017 7:32pm
So I did a quick mock-up of the triple clamps and forks tonight. You can see by the pictures what needs to happen. These marks were just quick measurements to see what I am working with, but gave me a good idea of what needs to happen.

I measured and marked the center of the OEM triple clamp. Then, ran the clamps from steering stop to steering stop and marked where the center line landed.





The just took some quick measurement off of the radiator. Most of these are really just getting it "close"





I then bolted on the new clamps and forks and right away it is obvious what needs to be done. I marked the center of these clamps and lined it up with my mark on the frame with the previous clamps. You can see the steering stop needs to be about 0.335" wider on each side, and also lower on the head tube.







You can see the fork is now the steering stop on the frame, which is clearly no good.





Getting a bit ahead of myself here





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ledger
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11/4/2017 7:30pm
That looks great !! Gotta ask, just how large a Kawasaki decal is in the 6th pic down ? Just wondering....Wink
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BobPA
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11/4/2017 8:30pm
ledger wrote:
That looks great !! Gotta ask, just how large a Kawasaki decal is in the 6th pic down ? Just wondering....Wink
48"

D'Cor makes them, I believe they are around $20. Got is from Western Powersports....Going in my pool table room haha
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BobPA
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11/6/2017 1:11pm
Kx125rider wrote:
Love the gold rims and old school look in general.
Thanks. I believe this may have been your old bike?
11/6/2017 3:35pm
Kx125rider wrote:
Love the gold rims and old school look in general.
BobPA wrote:
Thanks. I believe this may have been your old bike?
Yea good to see its in a good home, its gonna turn out sick.
BobPA
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11/8/2017 4:05pm
twotwosix wrote:
Looking great. Any plans for the shock?
Thanks. Nothing at the moment besides bumping up the spring rate for my fat ass. Shock works well actually. I would not be opposed to running some PC dog bones though.
Sidecar
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11/13/2017 10:17am
Gonna look nice, the gold wheels will look awesome!!!
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BobPA
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11/13/2017 6:54pm
Sidecar wrote:
Gonna look nice, the gold wheels will look awesome!!!
Thanks, did some limited work today. I lawn darted two weeks ago and busted up my arm pretty good. So I have been feeling like shit with antibiotics and haven't touched anything. My arm is working enough to resume this week though.



Looks like my new steering stop will have to be at least 1.560" total. I got this by measuring the OEM stop at 0.890" and adding the 0.335" per side needed per my prior measurements. Obviously going to start on the larger side...easier to remove material than to add haha.




Here is a quickie of my arm. Crashed in a shitty roller section after it rained, somehow got these bullet wounds haha. As they were scrubbing the shit out of it the the PA shot water in the big hole, and it came out the smaller hole...you should have seen my girlfriend squirm. Seeing as they connected it made for an extreme likelihood for infection.







ledger
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11/14/2017 12:36am Edited Date/Time 11/14/2017 12:38am
I kinda figured that little boo-boo had you down for a few day's (just mess'n). Glad to see you back working on the bike, I'm still waiting on the powdercoat guy to get his shop set-up, if he can't get it together soon, I'll paint it myself with automotive paint. Anyway, glad you didn't get too banged up, heal up brother.
Markee
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11/14/2017 4:34am
Nice, can't believe I've missed this thread.

Doing something similar on my 500 as far as the shroud graphics go, but my build will be black/green only with yellow backgrounds.
BobPA
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11/15/2017 6:56pm
Markee wrote:
Nice, can't believe I've missed this thread. Doing something similar on my 500 as far as the shroud graphics go, but my build will be black/green...
Nice, can't believe I've missed this thread.

Doing something similar on my 500 as far as the shroud graphics go, but my build will be black/green only with yellow backgrounds.
Nice, what color wheels and frame are you going with?
BobPA
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11/15/2017 7:06pm Edited Date/Time 11/15/2017 7:11pm
This post is for KDXgarage. Basically all I did here was cut a piece of 1/4" think steel, used the grinder to make it fit the frame, welded her on. The pictures pretty much tell the story. It is a simple process, but still takes time and patience. I used a MIG welder because the TIG was out of gas lol. When using a MIG I did not run a full bead all at once. This was to minimize the heat going into the headtube, while still getting good penetration.The bottom of the headtube is actually quite thick and would probably be fine running complete beads. I did not run the beads all the way to the edge because I thought I may have to file the steer stop a bit shorter.









You can see here that I filed the stop so the triple clamp would land flush. I guessed on the angle when I initially made the piece...But, it did not land perfectly flush.









Tomorrow night it gets stripped down to the frame, and off to the powdercoaters on the weekend.

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ledger
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11/16/2017 12:04am
Nice work. Looking fwd to seeing the frame after the fresh powdercoat....carry on.
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KDXGarage
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11/16/2017 2:10am
Thank you very much for the posts and great pictures. I appreciate it! It looks great.
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BobPA
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11/16/2017 6:38am
KDXGarage wrote:
Thank you very much for the posts and great pictures. I appreciate it! It looks great.
TIG will do a much "prettier" weld if you are concerned about that. I just wasn't feeling the half hour drive to refill the tank...took the last mans route
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BobPA
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11/17/2017 8:07pm
Well the easy part is done. Powdercoat this week, then hours and hours of cleaning and polishing. Swingarm bearings do not need replacement...That is a plus.











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