1996 cr250r issues

[CSyz]

ok gotta few questions for you guys and gals.

Does anyone have pics and detailed info on tuning this bike?

Kickstart wont budge, this is a seized piston yes? just the topend rebuild or what?

Thanks

[NYMXer]

It could be anything from a stuck piston to WORSE!!! Take it apart and find out.

[ossagp1]

I have lots of "stuff" on that one. You have to be a little more explanatory of what went before "kickstarter won't budge" before anyone can really tell you what it could be. Take the pipe off and look inside the cylinder and see if it looks like a seized piston for starters. It could just be the kickstart mechanism, but it would help a lot if you would tell evertything you know leading up to what you described.

[CSyz]

Ohhh k. well it ran fine before, then it just wouldnt start but would turn over. Then we changed out the plug gapped correctly. and then this happened, i think we are gonna take it apart sometime then take a closer look thanks.

[CSyz]

Finally took it apart and found out the rings were wicked worn causing the piston to tilt and not move at all. It was also in about 1million pieces.

Now It seems the PO bored the cylinder out a little. Can we go out again and then rechrome it?

Also does anyone have a good way to flush the bike? I was told to use kerosene in the crank area to get all the little pieces out.

Thanks!

[ossagp1]

oh you can do anything from the kerosene to diesel to 5 dollars at the car wash. all of them will get about 98 percent of the pieces out. Is that good enough for you to take a chance on or not?

Seriously, if that much metal was flying around down there, regardless of whether they pass a "feel" test right now, the rod bearin and main bearin are really good candidates for replacement.

You can likely get the cylinder redone or oversized and replated, they can save about anything.

[CSyz]

What at the carwash? the water will kill the bearings...

Thanks, im hoping its that easy, I told my brother id pay for the parts so i don't wanna go overboard

[ossagp1]

Oh yeah,, how silly of me,,,yeah,,right water does what to steel,,,disolves it!! Is that it?

When you say easy I am wondering if you actually read my post, but good luck.

[CSyz]

Listen silly goose: Water will kill your bearings!

I did read your post too, It pretty much is good enough to chance it. Its an 11 year old bike. If it toasts, he will buy a new one.


Basically it is easy to flush, get the head redone... Im sorry that is hard for you.

[ossagp1]

LOLOL!! Sonny, if you stripped it down today to it's last bolt, that might be your first time. My 101st time was probablay before your parents met. Again, good luck though.

I am going to guess you have never made a dime off any of your mechanical skills. Now I am off to write to some bearing companies and tell them not to clean any of the newly manufactured product with water.

[CSyz]

Guess again. Ive worked with cars for a while now. Why the hell do you think water is bad for an engine? other than it not compressing causing bent rods!

I do know how an engine works, and no I've torn down a bike before.

Sorry if your that old you should really be in the guiness books by now

[ossagp1]

I don't believe you!! Now it will bend your rod if you pressure clean your bearings. You are cracking me up. I didnt say run it on water. Though if you actually ride one it will sure take some in if you cross streams.

You dont really get paid to work on cars do you??

[CSyz]

I used to till the pay/hr. ratio didn't work out.

Sorry, I won't fill my case with water. And what do they use at car washes? Pressure washers.

And ride what? a bike? wow i thought that was why i was on this forum. Not to get harrassed by an old guy, that can't just tell me where to get my cylinder done... Thanks for the info on the flushing though.

[stormbringer]

CSyz,

Why do you not just split the cases and rebuild the crank and replace the bearings. NOT way too hard for the mechanically inclined, NOT too costly, and you will have peace of mind knowing the engine is mint.

Oh, you can't because why?

"Its an 11 year old bike. If it toasts, he will buy a new one." right?
So the money you blow on the top end won't matter?

[TUK101]

Honestly, I have taken my chances on the bottom ends when the piston grenades and have learned that it is about a 50/50 chance of it actually working out. When it doesn't work it usually ends up costing over $500 to fix. If it does, you end up saving about $300 or so. Tranny fluid has worked the best for me for retrieving the tiny pieces of piston that frag all over the bottom end. If there is any resistance whatsoever when you spin the crank by hand you are done for before you even get the bike running.

[ossagp1]

I will pray for his bike!!

[TUK101]

Originally Posted by ossagp1

I will pray for his bike!!

That is probably a good idea. Because it sounds as if he has his mind made up about just doing the top end lol.

[CSyz]

Originally Posted by ossagp1

I will pray for his bike!!

Thanks

We will see how it turns out. now can i hear about boring the cylinder and then recoating it?
TIA

[CSyz]

Originally Posted by TUK101

Tranny fluid has worked the best for me for retrieving the tiny pieces of piston that frag all over the bottom end. If there is any resistance whatsoever when you spin the crank by hand you are done for before you even get the bike running.

Cool, there is no resistance whatsoever it moves real smooth. No up and down play whatsoever either. we are painting parts now and trying to find a place to do the machine work.

[crdude]

This CSyz guy cracks me up, hey, when your bottem end lets go, and your parting your bike out, let me know so I can buy a few parts off ya' for my 96.

So hey, its been most of a year sens this thread was started.. why isnt your bike running yet? I thought you were Mr. Pro mechanic?