2003 YZ250 Build - The Steely

slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
Edited Date/Time 5/17/2017 7:33pm
I have been working on this project for a couple of months. Snapping pics as I go, so enjoy those as I get this thread up to date.

Here is the story. I am currently 26. My best friend and I rode 80s , his dad drove us everywhere, it was awesome in one single word. Dads – those are the best times ever, even if we are a pain in the ass and are shit heads, we will remember those days with lots of love. Thank you.

We both “Hung” up the boots as they say as soon as we turned 16 and started chasing girls around. Rediscovered the sport when I was about 24. First bike back was a 02 CR125, next bike was a YZ426, then I went all out and picked up a 2014 YZ250f. Loved that bike….but I eventually realized that I don’t need that kind of money tied up in a dirtbike to enjoy the sport.

#1


#2


#3 Sold today (7/16/15), happy to get out from under that debt! I will miss this bike though, superb power and handling


I don’t race much, but when I do it’s totally for fun, just like any track day. So yeah, when my buddies 2003 yz250 lost the airboot and sucked a ton of dirt in….I was waiting like a vulcher for him to sell it to me cheap. I think this is the perfect “long term play rider” bike. There is a decade of parts built up on the planet that will keep the costs low and easy to maintain for a long term.


Here we go!

I don't have many"before" of the YZ250 but this will give you a general idea of the bike. Everything was not too bad except the motor and the wheels. Which were just horrible. Motor was toast, every spoke nipple seized.



Look at that sand paste!! Ouch










I could not find my flywheel puller so I rigged up the case splitter in a way that grabbed the flywheel. Took like 5 attempts to get right.



Clutch outer cover side was really nice condition, zero wear on the basket and the gears



Got the cases split and trans out.




This was terrifying but I got it out no problem



Pulled every bearing and seal out of the cases and then sent the cases off to get vapor blasted. 65 bucks later and I am as happy as happy as the proverbial pig in shit. Will post these pics tommorrrow!!! stay tuned
|
Premix
Posts
1514
Joined
1/5/2014
Location
AS US
7/17/2015 6:23am Edited Date/Time 7/17/2015 6:27am
I just did the same with a my kx250. I've been out of the riding scene for almost 10 years now, went to college after high school and now finally have a great job and the money to afford motocross again. It's a great feeling and I enjoy it now just as much as I did 10 years ago
slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/17/2015 7:52am Edited Date/Time 10/9/2015 9:13am
Thanks guys! Yes, I am also appreciating being older now with a good job to afford the sport. But at the same time, I did learn that (for me) a new bike does not equal more fun. That’s just me.

The new bikes are really, really, sweet, but at this point in my life, the fun is the experience with my riding buddies. It does not matter what bike I am on, as long as it is in good mechanical order and set up right for me.

Ok, here are some pictures of the cases vapor blasted by Dan Vitaletti – Vapor Blast Solutions.
http://www.vaporblastsolutions.com/

I highly recommend him. Although I said above that I pulled all the bearings, I forgot about the blind hole ones.
I asked Dan and he pulled the blind hole bearings out for me as well as the blasting, and did a great job all around. I was nervous about the clutch shaft bearings. Those dudes, you don't want to mess with them. So I plugged them and asked Dan to be careful not to get media in them. As you can see I rubber plugged them on one side and oil soaked rag in the other. He made sure to not get anything in them. Thanks Dan!!







Markopolo400
Posts
1377
Joined
7/24/2012
Location
St. Paul-ish, MN US
7/17/2015 8:04am
Holy clean! I will have to look into having that done on my KX250 project cases

The Shop

slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/17/2015 8:19am
Holy clean! I will have to look into having that done on my KX250 project cases
Definitely, his prices are incredibly reasonable. I could never get cases clean by hand or with soda blasting. Vapor or aqua blasting is the way to go. Apparently vapor and aqua blasting process closes the pores in the aluminum so they wont stain as easy. Cool!
Tell him R.M. in Nacogdoches sent you. I appreciated his help especially with the blind hole bearings, saved me some money on buying that puller set.
Andrew337
Posts
128
Joined
6/24/2015
Location
Grand Prairie, TX US
7/17/2015 6:08pm
I'm in the same boat. I quit riding for about 5 years while I earned my degree. Now I finally have some disposable income and free time, so I fixed up an '02 YZ250 and really can't imagine much more that I want out of a bike.

The silver frame and blasted cases look awesome!
slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/17/2015 7:17pm
Andrew337 wrote:
I'm in the same boat. I quit riding for about 5 years while I earned my degree. Now I finally have some disposable income and free...
I'm in the same boat. I quit riding for about 5 years while I earned my degree. Now I finally have some disposable income and free time, so I fixed up an '02 YZ250 and really can't imagine much more that I want out of a bike.

The silver frame and blasted cases look awesome!
Sweet! You got a good bike there. I went the long (and expensive) way around back to the two strokes.

Thanks for bringing up the silver frame. I forgot to mention it. It is definitely one of the positives on the bike. Apparently the owner before my buddy bought it had it powder coated silver. The only thing I know about painting is that I cant paint for shit. I say who ever did it for him, did one heck of a job. It is flawless.
slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/18/2015 6:16pm
This will be the wheel post.

I have been working on the wheels for a while, going back and forth trying to decide if I wanted to send them to KSR or Faster vs lacing/truing them myself. I also did not know how much $$$ I wanted to spend on them. I decided to just see if I could spruce them up myself and save that cash. The pics don't show it, but the rims are dull, especially the rear, but most important, they are straight! I wanted new shiny rims, but these should work just fine.

The entire process was really fun and rewarding. Much more than I originally thought once I decided to give it a go myselft. I took my time and enjoyed it.

Yesterday I received my wheel bearings and spoke kit so I decided to just go ahead and try to finish them up. I was nervous at first but it went really smooth and allot faster than I thought.

Before and after shot - Front Hub


Before and during - Rear Hub


Redneck Lathe


Finished with 3m 320p


These are from today











Fresh
Posts
709
Joined
5/22/2015
Location
AU
Fantasy
3312th
7/18/2015 8:54pm
slackinoff wrote:
This will be the wheel post. I have been working on the wheels for a while, going back and forth trying to decide if I wanted...
This will be the wheel post.

I have been working on the wheels for a while, going back and forth trying to decide if I wanted to send them to KSR or Faster vs lacing/truing them myself. I also did not know how much $$$ I wanted to spend on them. I decided to just see if I could spruce them up myself and save that cash. The pics don't show it, but the rims are dull, especially the rear, but most important, they are straight! I wanted new shiny rims, but these should work just fine.

The entire process was really fun and rewarding. Much more than I originally thought once I decided to give it a go myselft. I took my time and enjoyed it.

Yesterday I received my wheel bearings and spoke kit so I decided to just go ahead and try to finish them up. I was nervous at first but it went really smooth and allot faster than I thought.

Before and after shot - Front Hub


Before and during - Rear Hub


Redneck Lathe


Finished with 3m 320p


These are from today











holy Fkn Shit! that looks amazing! great turn around on the hubs!
slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/19/2015 6:47am
Those cases are borderline erotic to look at.
Thanks SeaClassExpert! Any one that has tried all sorts of ways to clean cases knows how tough it is to get it really nice. Sounds like you have too! haha.
slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/19/2015 6:52am
Fresh wrote:
holy Fkn Shit! that looks amazing! great turn around on the hubs!
Thanks Fresh!
I was surprised myself, especially after getting quotes from the popular wheel builders to "turn down" the hubs. Not a cheap deal, unfortunately. So I thought WTH, I can rig something up. I did not think they were going to clean up as fast and easy as they did.... a flat file and 60grit will do some work in a quick hurry!
7/19/2015 10:59am
Those cases are borderline erotic to look at.
slackinoff wrote:
Thanks SeaClassExpert! Any one that has tried all sorts of ways to clean cases knows how tough it is to get it really nice. Sounds like...
Thanks SeaClassExpert! Any one that has tried all sorts of ways to clean cases knows how tough it is to get it really nice. Sounds like you have too! haha.
Right on man! I suggest coating those hubs in some kind of sealant or at the very minimum, copious amounts of WD-40, they look great!
731chopper
Posts
4083
Joined
1/2/2015
Location
DFW, TX US
Fantasy
355th
7/19/2015 11:12am
Looking good. Your story sounds similar to mine. I grew up racing and made a lot of great memories with my dad. I stopped at 18, went to college, got started in a career, married, child, house, etc then decided it was time I could get back into moto. I have a 250f that I bought new last year but now also have a 2003 kx250 that I enjoy riding just as much. I'm going through the bike cleaning it up, rebuilding some things, replacing worn parts, bearings, etc and really am enjoying it. Falling in love with the sport all over again was a lot of fun.
slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/19/2015 12:01pm
Right on man! I suggest coating those hubs in some kind of sealant or at the very minimum, copious amounts of WD-40, they look great!
I know right?! I was also thinking they are probably not going to look good for very long. I did the same clean up to the 426 linkage and then clear coated it....that was a mistake, the clear coat looks like junk after a short amount of time. But that was probably my fault. I cant paint.

I am going to try wiping corrosionX on them before I ride.
slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/19/2015 3:18pm Edited Date/Time 7/19/2015 3:22pm
Made my final order (fingers crossed I have not missed something) this afternoon.

Some small OEM bits and pieces that I needed for stuff all over the bike.

Tires - I went with a cheap rear to save some money and just to see what they are like. Artrax MX-Pro. I did go with a MX32 Dunlop for the front. I can live with a not so good rear tire, but I really like to trust my front.

Other items - Tusk solid front rotor, brake pads f & r. pro x steel clutch plates, rim straps, tubes, driven front sprocket.

The only other thing I need to spend money on is the rear shock. I am going to send it off for a rebuild. By the look of the bumper....it probably still has the 2003 oil still in it. Yikes!



I don't think you are supposed to be able to push down the piston with one hand....unless you are a body builder bro



Since something is already wrong, I am shipping to the suspension guy like this, maybe it will fit it inside one of those priority mail boxes.



Anyways, that's it for this weekend. I am going to kick my feet up. I still have some stuff I would like to post from a few weeks ago. Will do that during the work week. Hope Y'all have a nice rest of the weekend!


slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/19/2015 4:02pm Edited Date/Time 7/23/2015 8:39am
Those cases are borderline erotic to look at.
Haha, thanks. I keep the engine under some towels while its still split to keep the dust out. I swear every single day I have come home from work I go right to my "boiler room" to take a peek (my spare bedroom....def not a place you take a lady, its hella creepy with engine parts and such strewn about) I can't help myself. Best $ I think I have ever spent.
slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/19/2015 4:04pm Edited Date/Time 7/19/2015 4:04pm
731chopper wrote:
Looking good. Your story sounds similar to mine. I grew up racing and made a lot of great memories with my dad. I stopped at 18...
Looking good. Your story sounds similar to mine. I grew up racing and made a lot of great memories with my dad. I stopped at 18, went to college, got started in a career, married, child, house, etc then decided it was time I could get back into moto. I have a 250f that I bought new last year but now also have a 2003 kx250 that I enjoy riding just as much. I'm going through the bike cleaning it up, rebuilding some things, replacing worn parts, bearings, etc and really am enjoying it. Falling in love with the sport all over again was a lot of fun.
You got that right. It hasn't lost its magic for me. The excitement of getting up early, loading up the truck, and just having a blast out at the track. Nothing else seems to matter on those days. Pure joy.
mb
Posts
769
Joined
7/22/2014
Location
Columbia, SC US
7/21/2015 3:52pm
Would you mind posting up how you built your redneck lathe? Those hubs turned out beautifully.
Fresh
Posts
709
Joined
5/22/2015
Location
AU
Fantasy
3312th
7/21/2015 6:38pm
Fresh wrote:
holy Fkn Shit! that looks amazing! great turn around on the hubs!
slackinoff wrote:
Thanks Fresh! I was surprised myself, especially after getting quotes from the popular wheel builders to "turn down" the hubs. Not a cheap deal, unfortunately. So...
Thanks Fresh!
I was surprised myself, especially after getting quotes from the popular wheel builders to "turn down" the hubs. Not a cheap deal, unfortunately. So I thought WTH, I can rig something up. I did not think they were going to clean up as fast and easy as they did.... a flat file and 60grit will do some work in a quick hurry!
Defiantly trying this! Got my wheels unlaced at the moment and wasn't sure what direction to go. what's the process?
slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/22/2015 1:18am
Fresh wrote:
Defiantly trying this! Got my wheels unlaced at the moment and wasn't sure what direction to go. what's the process?
Yea go for it! It was really easy. Only downside is that you get aluminum powder everywhere, so one, its hard to keep it out of the bearings and two, it gets all over you and the work area. Wear a dust mask.

So I took down the main casting marks with an angle grinder/dremel untill it was pretty close (be careful not to go too far or you are done for) then I got a flat file and finished it off. Once you get really close with the flat file, you just have to feel it out by sight and by your hand.

The final step was to get a long, thick piece of all thread with nuts and washers, and get that hub chucked into a drill. Be really careful as you will have to use one hand with a piece of sand paper and one hand on the drill trigger. I started with 60 grit, 100, then 320p 3m auto body paper. This part takes a bit of set up and practice. I let the drill rest on a table, block of wood as a "bushing" for the all thread to rest on while spinning, and the hub over my lap. Right hand pressing down on drill and thumb on trigger, left hand with paper wrapped around hub and applying pressure.
Fresh
Posts
709
Joined
5/22/2015
Location
AU
Fantasy
3312th
7/22/2015 1:56am
Fresh wrote:
Defiantly trying this! Got my wheels unlaced at the moment and wasn't sure what direction to go. what's the process?
slackinoff wrote:
Yea go for it! It was really easy. Only downside is that you get aluminum powder everywhere, so one, its hard to keep it out of...
Yea go for it! It was really easy. Only downside is that you get aluminum powder everywhere, so one, its hard to keep it out of the bearings and two, it gets all over you and the work area. Wear a dust mask.

So I took down the main casting marks with an angle grinder/dremel untill it was pretty close (be careful not to go too far or you are done for) then I got a flat file and finished it off. Once you get really close with the flat file, you just have to feel it out by sight and by your hand.

The final step was to get a long, thick piece of all thread with nuts and washers, and get that hub chucked into a drill. Be really careful as you will have to use one hand with a piece of sand paper and one hand on the drill trigger. I started with 60 grit, 100, then 320p 3m auto body paper. This part takes a bit of set up and practice. I let the drill rest on a table, block of wood as a "bushing" for the all thread to rest on while spinning, and the hub over my lap. Right hand pressing down on drill and thumb on trigger, left hand with paper wrapped around hub and applying pressure.
i think i could get that to work... Cheers for that, seems like a cheap alternative to getting them turned down professionally and powder coated!
slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/23/2015 8:37am
Hey Vital Members!

Been a crazy past few days, but the end is in sight.

I have been taking care of some cats and dogs while a part of my family is out of town. Been waking up at 5:30 for the past 4 days so that I can get everyone fed, watered and shat. Then I do it all over again after work. Family is coming home today so hallelujah!

I got the shock sent off Monday. Crank and cylinder was sent last week. Not sure on the timeline for the crank and cylinder, but I bet I get the shock back this week. The suspension guy is really quick.

I will clean and re grease all the suspension bearings at some point, but I made the effort to go ahead and clean/inspect the swingarm bearings since those would be a chore to get to once the bike is back together. They looked great, everything is smooth, grease is dirty. Thankfully nothing needs to be replaced except for the seals.

Here are some pictures of the engine case bearings install. I did cases in the oven and bearings in the freezer. I found it easier if I only left the bearings in for about 30 min. If they got too cold they instantly get a layer of frost and makes em hard to get in actually.




One of three of my last orders. Sweet!


Matt Fisher
Posts
3948
Joined
4/1/2008
Location
Visalia, CA US
Fantasy
1177th
7/23/2015 8:42am
slackinoff wrote:
Hey Vital Members! Been a crazy past few days, but the end is in sight. I have been taking care of some cats and dogs while...
Hey Vital Members!

Been a crazy past few days, but the end is in sight.

I have been taking care of some cats and dogs while a part of my family is out of town. Been waking up at 5:30 for the past 4 days so that I can get everyone fed, watered and shat. Then I do it all over again after work. Family is coming home today so hallelujah!

I got the shock sent off Monday. Crank and cylinder was sent last week. Not sure on the timeline for the crank and cylinder, but I bet I get the shock back this week. The suspension guy is really quick.

I will clean and re grease all the suspension bearings at some point, but I made the effort to go ahead and clean/inspect the swingarm bearings since those would be a chore to get to once the bike is back together. They looked great, everything is smooth, grease is dirty. Thankfully nothing needs to be replaced except for the seals.

Here are some pictures of the engine case bearings install. I did cases in the oven and bearings in the freezer. I found it easier if I only left the bearings in for about 30 min. If they got too cold they instantly get a layer of frost and makes em hard to get in actually.




One of three of my last orders. Sweet!


Try putting a very thin layer of grease on the outer race of the bearing- no frost. I also use dry ice from the local supermarket and combined with the heated cases, they will sometimes drop in with no more effort than your thumb.
slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/23/2015 1:39pm Edited Date/Time 7/23/2015 1:40pm
Try putting a very thin layer of grease on the outer race of the bearing- no frost. I also use dry ice from the local supermarket...
Try putting a very thin layer of grease on the outer race of the bearing- no frost. I also use dry ice from the local supermarket and combined with the heated cases, they will sometimes drop in with no more effort than your thumb.
Will try that next time I have to put one in....hopefully not soon.

Also the reed valve was so full of dirt it was not sealing if you try to pull air through it with your mouth (gross) but it's an easy way to check. I cleaned it up and it seals perfect now.




slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/28/2015 1:33pm
Another update coming tomorrow. Here's just a random picture update. Been busy keeping family and friends animals fed while they go jetset around. I got asked back to back weeks!
I have made progress on the bike, just little things day by day that add up. Will post tom.

At least this time around my buddy knows how to trade fair for animal watch.



Here is an old picture my riding buddy Brad found from way back. It must have been early 2000's. His dad surprised him with that bike. I think I remember it was just when the 85's came out instead of the 80's. I was the first person to crash it. Haha, I remember Brad was ticked off. In the background is a ttr125 that got beat to absolute shit but never let him down. I tell you though, Brad knew that bike so well he could keep up decently vs the other 80s. It was impressive to see him bottom that tank out on some of the bigger jumps. (probly why your feet are so flat bro)


Picture of me when I was getting back into the sport. Old gear, old bike, same goon riding it.


Here is the project bike as it was delivered in a rainstorm.
slackinoff
Posts
307
Joined
11/18/2014
Location
Nacogdoches, TX US
7/30/2015 8:04am Edited Date/Time 10/9/2015 9:17am
Little things here and there start to add up. That would be the theme for these past couple of weekends.
Getting the tires on was an adventure. I don’t like to change tires, but you know what? Now would be a good time to get some practice in. I am sure many of you know, all the little tricks make it much less difficult. I could not get the Artrax rear tire on, it was pretty stiff at room temp. I placed that cheap bastard out in the Texas sun for a couple of hours and that took the job from impossible to easy peasy. The wheels are complete. Which was a big deal as the originals were in not good shape.

Before.


After.



This entire project I have tried really hard to make sure I was not overpaying for things. I used RMATV, Motosport, and Honda Toleado East, and even Ebay for things.
What I found out was interesting. On many occasions, Yamaha OEM parts were cheaper than aftermarket stuff. For example these parts were nearly half the cost of aftermarket. Mud flap, aluminum front wheel spacers, and chain adjusters. Not to mention (I know this is debatable) but the OEM stuff generally fits better and is higher quality.

These old wheel spacers were trashed. I almost overlooked them. I don’t think my new seals would have lasted very long.


I got a screaming deal on Ebay for these new YZF footpegs. They came with all of the hardware, except for the cotter pins.




I had a gift card for RMATV so guess what!? I decided to treat the old steed to a FMF factory fatty. So excited! My first real MX bike was a old CR80 that had a PC works style pipe. I loved that bike, and keeping the pipe clean should bring back good memories.




Post a reply to: 2003 YZ250 Build - The Steely

The Latest