2000 RM80 build

cbrown_137
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cbrown_137
Edited Date/Time 8/8/2022 1:28pm
Hello everyone, last week I came across someone getting rid of 2 dirt bikes. When I found them on line the guy had absolutely zero Idea what they were. I showed up and one was 2000 RM80 and the second was 92 YZ80. I offered him $100 for the pair and the deal was done.



The YZ is in pretty rough shape so I figured while I try to secure parts for that I’d start on the RM.

I always find my self looking at other peoples builds and I figured there’s a lot more like me out there so I figured I’d start this post.





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cbrown_137
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cbrown_137 7/26/2022 12:51pm
7/26/2022 12:51pm
I have made it a good ways into tearing this down, it is amazing to see what people have done over a 20 year period. Just end up shaking my head more and more.
5
Glen
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Glen 7/26/2022 4:01pm
7/26/2022 4:01pm
awesome! I love when people put up content like this. keep it up!
2
snillum
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snillum 7/27/2022 8:41am
7/27/2022 8:41am
I cannot express how jealous I am of that deal for the RM80. I keep trying to find a good deal on one. It was my first bike and I want to rebuild one for sentimental value lol.
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cbrown_137
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cbrown_137 7/27/2022 12:58pm
7/27/2022 12:58pm
This is without a doubt about reliving childhood dreams. My wife said why do you need more dirtbikes I said because I dreamed about them as a kid and now can have them as an adult!
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The Shop

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Banana_oil
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Banana_oil 7/27/2022 1:06pm
7/27/2022 1:06pm Edited Date/Time 7/27/2022 1:07pm
There is something special with 80cc bikes, I love builds like this. I also have one of my childhood dream bikes, yz80 93.

13
OleTex
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OleTex 7/27/2022 3:32pm
7/27/2022 3:32pm
That RM looks promising. I love these threads too. Maybe we can all help you source parts? More brains involved..
1
cbrown_137
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cbrown_137 7/27/2022 3:48pm
7/27/2022 3:48pm
OleTex wrote:
That RM looks promising. I love these threads too. Maybe we can all help you source parts? More brains involved..
That was a secondary reason for posting. I figured there has to be a lot of knowledge here!!
cbrown_137
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cbrown_137 7/27/2022 3:52pm
7/27/2022 3:52pm
Banana_oil wrote:
There is something special with 80cc bikes, I love builds like this. I also have one of my childhood dream bikes, yz80 93. [img]https://p.vitalmx.com/photos/forums/2022/07/27/561508/s1200_DSC_0161.jpg[/img]
There is something special with 80cc bikes, I love builds like this. I also have one of my childhood dream bikes, yz80 93.

Sooooo sick!!
1
cbrown_137
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cbrown_137 7/28/2022 5:28pm
7/28/2022 5:28pm
My brother and I built a track behind our houses we are neighbors. Big bikes 125/250/450s don’t really fit on it it was built more for pit bikes so I’m thinking these 80s will be ideal for it!


6
cbrown_137
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cbrown_137 7/29/2022 6:01pm
7/29/2022 6:01pm
So far the only problem I have hit is this bolt being seized and stripped. Trying to figure out how to get it out.
2
Banana_oil
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Banana_oil 7/30/2022 12:17am
7/30/2022 12:17am
Drill the head with a 6mm til the head comes off. Then you hopefully can get out the rest out of the cylinder with pliers.
2
cbrown_137
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cbrown_137 7/30/2022 11:51am
7/30/2022 11:51am
I ended up smashing a torx bit into and applying a little
Heat, spun right out.
6
jujusuzukirm 7/31/2022 12:01am
7/31/2022 12:01am
I had rebuild one in 2014 if you need informations you can contact me, there are a lot part of 85 rm whitch can used
2
cbrown_137
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cbrown_137 7/31/2022 5:00pm
7/31/2022 5:00pm
I was able to get some paint on the frame before the humidity jumped today!

Before


After



3
cbrown_137
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cbrown_137 8/2/2022 2:17pm
8/2/2022 2:17pm
Finally got in trouble! “Do these parts really need to be all over the kitchen?!” Also the dough ball whiskey is worth it if you can find it!
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Pit Row

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TK40_FC
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TK40_FC 8/4/2022 9:07am
8/4/2022 9:07am
Nice work, that's going to be alot of fun to rip around on your track. Just enough power / suspension to keep you feeling young as well.
1
cbrown_137
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cbrown_137 8/8/2022 1:28pm
8/8/2022 1:28pm
Welp as I continue I’ve now gotten into where I have no frigan clue what I’m doing. So I’m trying to figure my way around all of it. I was told by the kid I got
It from that it was bored out but how do I tell?!



YZed250
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YZed250 8/10/2022 6:58am
8/10/2022 6:58am
That cylinder looks pretty junk because it's been sleeved (previously bored and someone installed a cast iron sleeve). Am I correct that these bikes were originally a plated cylinder?
To check the bore diameter (approx.) just size it up with some calipers and compare to spec.
YZed250
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YZed250 8/12/2022 9:06pm
8/12/2022 9:06pm
Bore diameter for a 2000 RM80 is 47.5mm

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