Any interest in a two stroke dirtbike build?..

[Sublime one]

Last one I had was a YZ 490.
It was stupid fast and yes it hurt every time I rode it and that was when I was 26 years old.

It was a Four speed and once you had it going you never took it out of second gear.

Yep, that would be too much bike for me today! I would wrap myself around a tree inside of thirty days! When we were all thirty years younger we considered 250s a beginners bike! Now it is all the bike I could want or handle! You go @j par !!!

 

[j par]

I think I have a complete front end assembly for that bike J par. It’s not doing me any good if you need anything. Wheel, trees, brakes, forks.

Oh I forgot I am blocked , someone quote this so He will see it.

I appreciate the offer..

 

[j par]

Yep, that would be too much bike for me today! I would wrap myself around a tree inside of thirty days! When we were all thirty years younger we considered 250s a beginners bike! Now it is all the bike I could want or handle! You go @j par !!!

I've always had two stroke 250s. My curse has been when my friends have motorcycles I don't, and when I have them my friends don't... so before I bought this one I made a good friend of mine promise he would buy 1 if I bought one...

 

[j par]

From the last picture of the engine and frame on the bench, I went ahead and strip the frame of anything that it had left on it and set it aside...
I did do a compression check before I tore the engine down. And it seemed pretty good, but my gauge is very unreliable...
I took the head and cylinder off and the power valve areas were very dirty so I pulled those apart...
When I got the clutch mid cover off to see what the glob of JB weld was, it became extremely obvious...
The bolt that holds the drive gear to the crank shaft came loose and bored a hole through the case, and you'll love this instead of pulling the case off and tightening the bolt.
They just JB welded over the hole... ...
Not fixed correctly, which wouldn't have took much at the time caused the seal behind it to break loose, and all the oil got sucked up out of the case and burnt through the engine and probably was fouling spark plugs like crazy... Of course I found this out when I went to dump the oil out of the case and about 4 t-spoons came out......
The bolt was stripped and And getting the thread fixed in the crank was a real pain.. Thankfully, a local machine shop helped me out... Of course, to get to all that I had to split the case... This is and all the bearings seem to be good. But I did put new seals in everywhere... And I took the cylinder in to be honed and The guy said the piston was in good shape so I just bought new rings...

 

[cudavert]

Cool, I love 2-stroke anything!

 

[j par]

I got some little dremmel wheels from Amazon and got the cases and cylinder and head cleaned and again cylinder honed...

 

[j par]

For $60 bucks I threw in a new clutch and springs when I put the motor back together...
From there I cleaned up the frame and prmed and painted it...
And this brings things up to last week..

 

[RustyRatRod]

I assume the little radiator in front is an oil cooler?

 

[RustyRatRod]

I think it's cool you can do all this stuff. I couldn't find my butt in the dark with both hands with anything motorcycle related.

 

[j par]

I assume the little radiator in front is an oil cooler?

Actually, those are little water radiators they're water cooled nowadays.

 

[j par]

I think it's cool you can do all this stuff. I couldn't find my butt in the dark with both hands with anything motorcycle related.

I just bought a manual and subscribe to one of the motorcycle forums for some help as well...
I'm learning a lot as I go along. But that's usually my reason for doing it.

 

[j par]

Next up was a lot of uboob videos to learn how to rebuild the forks.. while the manual covered it it still was very difficult to understand as it was covering three different types/years and talked about stuff with pictures three pages previous... it helped but it took a "lot" of re-reading and back-n-forth...
First one was a struggle and second one was clock.work..
I cleaned everything up before the rebuild and Polished the ends after..
The dark oil is what came out and the clear is what went in...

 

[ValiantRacing]

I rebuilt this bike last year, it was all white and needed some help

 

[j par]

I rebuilt this bike last year, it was all white and needed some help

View attachment 1716141010

Real nice..!.. what year?..

 

[ValiantRacing]

Real nice..!.. what year?..

2005 first year for the alum frame

 

[j par]

More..?..