First Dirt Bike... already broke it : )

etxxz

"i wanna go fast"
So i bought a cheap cheap 1986 CR250 off craigslist. It wasn't running and it took throwing down a hill to get it running only to realize it was smoking like crazy.

A brief tear down revealed the cause:
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*top ring was actually split in two even though the cyl Nikasil was mostly good. Just a chip north of the exhaust port.

at which point i knew the engine was coming off so i could inspect further. Moments later:
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I knew the shocks were leaking so i took them off too to find the head bearings were a little tight and probably needed some grease (upgraded thrust bearings thankfully), the frame maybe needed a little paint to address the rust, so did the chain.... an hour and a half after my "new" motorcycle looked like this :x

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..lot of elbow grease on those shocks too. things were rusty, near pitted. right arm was sore for a day
:facepalm

LMAO, talk about a basket case.

Basically ran the bike for 10minutes, almost got pulled over for being on the street with it and now its torn down. The cylinder is out getting re-plated - This alone is costing more than the bike itself :rofl. Rebuilt the forks (seals) last night, the frame and some bits are at my powder coater's (BLACK!) and i guess i'll cleanup the rest and get her all assembled in the coming 2-3weeks.

SOB, i just wanted to put on a helmet and ride some easy trails. I've actually never dirt biked in my life. Have found many good resources here about trails and stuff so i'll post more pics when she's done and about that first dirt ride.

Thankfully i can build anything and my garage is better equipped than some mechanic shops. I'm dying to get out there and do the damn thang with all ya'll.

I'll leave the original body work which is good, just faded. Age is earned, no need to hide it. Just want to have a mechanically sound sturdy bike that won't leave me stranded.

I hear this is a classic, is powder coating the frame black blasphemous or am i safe to do it? Just saying because i had a green 600RR once and that was pretty offending to a lot of people i tracked with :ride
 
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BEN-ZX-14

Well-known member
Nice bike, i have an 89 motor cylinder, etc if you want to put it back together.

I bought the bike for the side case only. I mounted the 89 side case on my 86.


I have spent plenty on mine.
 

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KazMan

2012 Fifty is Nifty Tour!
Staff member
Honda was known for the red frame, I would make it red again. But that's just me.

Here's my '86 YZ250 that will be coming apart this summer for some resto! And I'll be going red frame :teeth
 

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etxxz

"i wanna go fast"
Nice bike, i have an 89 motor cylinder, etc if you want to put it back together.

I bought the bike for the side case only. I mounted the 89 side case on my 86.


I have spent plenty on mine.
lol yes i'm currently going through the same problem.. do i buy the 89 AL clutch cover or do i jbweld my water pump area. I sand blasted it to clean it. We'll see. Jb weld is a $5 risk. I def could use the 89 engine if you wanna get rid of it!! :thumbup

your bike looks very clean and pretty though. wow. have you taken it her on the dirt yet? hehe kiddin. it is super clean.

So much for buying old and stay on a low budget.. i'm probably going to be $1000 into it once all is said and done :shocker

Honda was known for the red frame, I would make it red again. But that's just me.

Here's my '86 YZ250 that will be coming apart this summer for some resto! And I'll be going red frame :teeth
:thumbup good point. I haven't seen a black frame... who had black frames?



some from the fork job. holy ** that was a messy job. Forks had literally no oil left in them -.- poor bike.
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KazMan

2012 Fifty is Nifty Tour!
Staff member
:thumbup good point. I haven't seen a black frame... who had black frames?

I can't think of a brand with a black frame in '86...

Honda/Yamaha - Red - Yamaha would go with a white frame in 87
Suzuki - blue
Kawasaki - silver
Husquvarna - silver ??

'84 I know the US Yamaha's were yellow/black with black frames...
 

fast4ward

Tired and Emotional
I bought a KTM MX500 with a broken rod that is in a similar way in my garage - a pile of parts waiting for me to buy a new piston and gaskets for it and restore the rest to 'nice' condition.

It's on my to-do list .......
 

Butch

poseur
Staff member
You rock. Once you have it put back together all freshened up it will work for years with little Maintenence.

Hit me up to go riding...
 

etxxz

"i wanna go fast"
right on dude you'll be hearing from me pretty soon then. Should get my cyl back from playing at about the same time the PC will have the frame done. Knowing me ill build the thing in one sitting... gotta find a place to go ride so tty about that ; |

I bought a KTM MX500 with a broken rod that is in a similar way in my garage - a pile of parts waiting for me to buy a new piston and gaskets for it and restore the rest to 'nice' condition.

It's on my to-do list .......
'Nice' is as far as I wanted to get as well.. just don't want mechanical problems. Fun projects that we get into woth the original intent to save money lol, but at what cost to us too in time and sweat..
 

etxxz

"i wanna go fast"
She's starting to look like a bike again...

even though its not red, it will not stay in the shed. Black is easier to keep "clean". Blasphemy!

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etxxz

"i wanna go fast"
Precision PC in san carlos/belmont. We send him a lot of stuff from my work. I give him all my personal stuff too always good prices. He always gives me a so so quote, i shrug, then he takes 30% and asks for cash. lol. So there you go.


Maaan the rear shock bearings were super filled with crap and had zero grease left in them... that was a messy job to clean it up.. eiighh. Front wheel bearing was not so bad but still. I bet the PO didn't maintain this bike ONCE for the 10years he owned it.

Brake caliper rebuilt. Brakes bled / rear adjusted (lol @ drum!). Tonight i'll clean the plastics and sucks i gotta wait 1.5wk for the Cyl to arrive otherwise she'd be running this weekend. Carb back to stock settings. Radiators cleared up.

Can't believe the manual asks for 20:1 gas. Dios Jesus!

Maybe tomorrow i'll throw the oily pipe and exhaust hardware in the fire, clean, dry, repack arrester. And Monday i get to track the 600RR at thunderhill so booya. fun weekend.
 

Lunch Box

Useful idiot
Damn Luis, you are making amazing progress. I need to strip down my new (to me) bike and go through it thoroughly soon, as well. This has certainly provided additional inspiration for that endeavor. :thumbup
 

etxxz

"i wanna go fast"
LMFTFY

[smoke]ringggttiiiinnnnngggggggriiiiiinnnnngggggggg [/smoke]
can't wait :laughing


getting the replated CYL on monday so tuesday she should running! ...maybe. Something tells me the replating process does away with the paint so i may have to spray the whole engine. Black. Wrinkle.

Cleaned the exhaust the good ol fashioned way... but unfortunately, in all my exitement i melted the AL muffler :rofl yup so now i have to find a used one on eBay. I know better. The whole exhaust was soaked in oil from the melted/beat-up piston and broken rings. oh well. lesson learned..
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etxxz

"i wanna go fast"
i can't believe i've slacked off so much:

this method to get out dents... not so good. Once she's running again i'll do it pressurized air and a propane torch :thumbdown It worked somewhat... plus the wife bitch slapped me in the morning.
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piecing back together. replaced cyl cachin$. 1986 HPP is totally retarded :wtf How in the world did honda come up with this design. Anyways, it was interesting to figure it out even with a service manual and as somebody who designs engines for a living lmao
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Wrinkle, no words :teeth
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this is the magnesium cover still... i should have taken a picture of what i did with the water pump section. Basically filled it with JB Weld. Ports too. another retarded moment for Honda this year. Magnesium and Water.

Plastics are still dirty but you get the idea.
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Will address the pipe once its running but i got most of the dents out. 3 freeze cycles.
 
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