83 YZ 250

downard254
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downard254
Ok guys, this was given to me. Guy said it was seized. Finally decided to start tearing into it. I'm not going to do a full resto on it, just want to make it a solid bike I can go have fun on.





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downard254
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Bremen, OH US
downard254 2/18/2017 11:35am
2/18/2017 11:35am
The frame is straight as a pin. I don't think it has any stripped bolts or nuts. Just really filthy and neglected. We're going to rectify that ASAP.



downard254
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downard254 2/18/2017 11:37am
2/18/2017 11:37am
I thought the throttle cable was froze up till I pulled the carb off. Mmmmmm, lots of mouse poop and pee. This sum bitch smells nasty!

downard254
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downard254 2/18/2017 11:40am
2/18/2017 11:40am
Not a bent tube or rail on the frame that I can find.

downard254
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downard254 2/18/2017 11:43am
2/18/2017 11:43am
I was able to take a hammer handle and tap the piston down so it's not welded together, the the piston and head are showing signs of detonation and/or damage from head leaking water into the combustion chamber. Can anyone tell from the shot of the head whether I should find another or can this one be doctored up?



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sandman768
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Saratoga Springs, NY US
sandman768 2/18/2017 4:11pm
2/18/2017 4:11pm
The 88 rm 250 I bought had mice in airbox & carb just like yours, I could not get that carb to work correct again! Dam mice! Cool bike..... Can't beat free.....
downard254
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downard254 2/19/2017 4:36am
2/19/2017 4:36am
Free is a good thing. Just running through a list of all ne bearings for wheels, suspension linkage. Swing arm, steering, and ne for bushings at Motorsport.com, I'm up over $350. Then I have to rebuild the motor, new front tire, side panels, and a few things I'm missing. Hoping to have it done for under $1000
228YZ
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Destin, FL US
228YZ 2/20/2017 6:42pm
2/20/2017 6:42pm


Downard 254, please keep updating this. I am hoping to get my 83 up and running one day. It has the long rod conversion that was recommended for the 84, a YZ 60 ignition and several other of the Yamaha wrench reports recommendations for the 83.
I can also, use any part supplier recommendations too!
vmxracer
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Toowoomba AU
vmxracer 2/21/2017 2:54am
2/21/2017 2:54am
I had an 83 125 back in the day, but it was the white Aussie version
downard254
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downard254 2/22/2017 12:29pm
2/22/2017 12:29pm
228YZ wrote:
[img]https://p.vitalmx.com/photos/forums/2017/02/20/177504/s1200_IMG_2905.jpg[/img] Downard 254, please keep updating this. I am hoping to get my 83 up and running one day. It has the long rod conversion that...


Downard 254, please keep updating this. I am hoping to get my 83 up and running one day. It has the long rod conversion that was recommended for the 84, a YZ 60 ignition and several other of the Yamaha wrench reports recommendations for the 83.
I can also, use any part supplier recommendations too!
Will do, I've made a list of all parts I want/need, and searching for best pricing. I'll post the list of where I wound up buying when I get done. I'm not trying to make a perfect restoration, I just want it to be in top notch rideable condition. The bike "Looking nice" would just be a bonus. I'll probably sell it within a year of completion. I'd really like to find a clean rebuildable '85 RM250. That's what I raced back then.
downard254
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downard254 3/25/2017 7:11am
3/25/2017 7:11am
Well, I had a little time yesterday and decided to pull the reed block off, and well, I found some little pieces of aluminum up in the reed block area.


downard254
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downard254 3/25/2017 7:12am
3/25/2017 7:12am Edited Date/Time 3/25/2017 7:15am
As I was naturally curious, I pulled the jug to investigate further. This is what I found.



downard254
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downard254 3/27/2017 5:39am
3/27/2017 5:39am
Yup, I'd say the best that piston had to offer is used up.Tongue

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