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Old 04-17-2010, 08:02 AM   #1
meams OP
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Spring Project: 1987 XL250R

Hello ADV- I'm new.

Used to ride throughout highschool but fell by the wayside when I went to university. However recently I came across a unique opportunity on a local car forum and decided to hop on it. I acquired a '87 XL250R for $50.

It developed a knock that varied w/ RPMs (although the owner couldn't be more specific about the noise) so he pulled the engine, opened it up, got busy at work, closed it up, and never re-assembled. I've been advised by friends more knowledgable than myself that I should put it back together and start it up to diagnose the issue - and then go fix it. They (nor I) were aware of any way to just open it up and see whats wrong [I'm competent, but not proficient].

So, as I embark on this little project - any advice/tips/tricks/warnings/words of encouragement?



In the event that you were wondering: Yes, this is being done in my living room. Yes, my apartment is on the second floor. Yes, my girl was the one who insisted on helping me carry it up the stairs --- and yes, she is a keeper.

meams screwed with this post 04-19-2010 at 03:57 PM
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Old 04-17-2010, 09:42 AM   #2
valvecrusher
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Quote:
Originally Posted by meams
Hello ADV- I'm new.
I acquired a '87 XL250R for $50.

I've been advised by friends more knowledgable than myself that I should put it back together and start it up to diagnose the issue - and then go fix it.
They (nor I) were aware of any way to just open it up and see whats wrong [I'm competent, but not proficient].

So, as I embark on this little project - any advice/tips/tricks/warnings/words of encouragement?



In the event that you were wondering: Yes, this is being done in my living room. Yes, my apartment is on the second floor. Yes, my girl was the one who insisted on helping me carry it up the stairs --- and yes, she is a keeper.
She IS a keeper.
I can't even keep all the bikes my girls knows i have at my home, much less the ones she doesn't know are mine.(It's my buddy's honey, i don't know why it's on OUR insurance,~ followed by my best straight face, like this)

Ask her to help push a bike through the house, and up the stairs, i'm certain her instinct would kick in and push the bike over on me at the bottom of the stairs..


You should be able to find 'something' that was making the noise, and you should look for

scored aluminum on hard cases
scratch cylinder bore
flattened cam lobes, and rocker arms

also look for play in the crank(big end) bearing, and the piston wrist bearing
check all the ball bearings for the crankshaft and transmission, make sure they roll smooth.

Those are good things to check in an already disassembled XL2
You can do it!

Inspiration below:Words of encouragement and general advice above



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Old 04-17-2010, 10:01 AM   #3
meams OP
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Quote:
You should be able to find 'something' that was making the noise, and you should look for

scored aluminum on hard cases
scratch cylinder bore
flattened cam lobes, and rocker arms

also look for play in the crank(big end) bearing, and the piston wrist bearing
check all the ball bearings for the crankshaft and transmission, make sure they roll smooth.
Thanks for the advice. I'm going to have to bury my head in my Clymer for a few hours or days before I open 'er up. I disassembled & rebuilt my honda (car) with a few friends - but one was a mechanic and did most of the actual engine work.

I guess learning by immersion is the best way
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Old 04-17-2010, 06:37 PM   #4
meams OP
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So I'm in the process of taking the top end apart to check things out - and I'm having the damndest time with this cam chain tensioner. I'm supposed to be pulling up on the tip where my arrow is pointing -- but it's so recessed into that housing I can't grab it for the life of me.

I just need to be able to lift it a little ways so I can slip a paperclip into the small hole it will reveal - but it's got me temporarily stumped.

Any ideas?

meams screwed with this post 04-19-2010 at 03:57 PM
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Old 04-17-2010, 08:06 PM   #5
gvthnks
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Push the piece in front of it down first. Each piece is tapered so if the front one doesn't go down a little the rear one can't come up.
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Old 04-17-2010, 08:07 PM   #6
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Quote:
Originally Posted by meams
So I'm in the process of taking the top end apart to check things out - and I'm having the damndest time with this cam chain tensioner. I'm supposed to be pulling up on the tip where my arrow is pointing -- but it's so recessed into that housing I can't grab it for the life of me.

I just need to be able to lift it a little ways so I can slip a paperclip into the small hole it will reveal - but it's got me temporarily stumped.

Any ideas?
Not offhand, but looks like a great project!
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Old 04-17-2010, 08:43 PM   #7
meams OP
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Pushing down the square piece in front of it helped me get at it a little better (it wouldnt' go down at first, was quite stuck). However, the angeled piece I'm trying to grab is still not quite attainable. There isn't much room on either side to grab it.
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Old 04-17-2010, 09:14 PM   #8
gvthnks
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Quote:
Originally Posted by meams
Pushing down the square piece in front of it helped me get at it a little better (it wouldnt' go down at first, was quite stuck). However, the angeled piece I'm trying to grab is still not quite attainable. There isn't much room on either side to grab it.
Mine was that way too. Not much to grab onto. Keep after it and you'll get it.
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wife calls it a sickness. I'm running a M/C rescue
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Old 04-18-2010, 09:16 AM   #9
meams OP
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I know the pictures are a bit big -- but I felt like a closeup was needed for this particular viewing assignment)

Allright. I haven't conquored the tensioner yet (I have adult league kickball practice in an hour or so), but I just snapped some pictures of my rocker arms for y'all to take a quick peek at. Since I don't really know what I'm looking for (I can presume, but i refuse to do so), I figured this would be easier.

Two of them "look" ok to me, and two are suspect (one moreso than the other).

Here is all of them:


The worst one


THe other questionable one (i really dont know what i'm looking for :shrug: )






Anyways - here's the bike (in the event that the original image didnt work:

meams screwed with this post 04-18-2010 at 04:06 PM
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Old 04-18-2010, 12:38 PM   #10
gvthnks
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Quote:
Originally Posted by meams


So - how do they look?

like mushrooms....
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wife calls it a sickness. I'm running a M/C rescue
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Old 04-18-2010, 01:06 PM   #11
meams OP
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Wait. So you can't see the bike pics at all? Becuase i'm definitely using URLs from the other web forum I frequent (The Shroomery).

I'm assuming we can't host images here on ADVrider?
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Old 04-18-2010, 01:49 PM   #12
gvthnks
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All I see is Shrooms...

You can host images here. That's the preferred method. For some reason they're just not showing up for me. Might be on my end.

Everyone else's pics are showing up though.
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09 Kawi KLR 650
05 Road Kind Custom
01 Suzuki DRZ-250
96 Honda Shadow
93 Honda XR 80
87 Honda XR250r
83 Honda XR350r
73 Honda XL350
73 CB750
73 Yamaha DT-1

wife calls it a sickness. I'm running a M/C rescue
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Old 04-18-2010, 02:04 PM   #13
meams OP
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Well, where do I go to host images? I tried the "Pics" link at the top of the screen but it took me to an image gallery - not aywhere where I can upload my own.

Sorry i'm so ignorant. Super new.
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Old 04-18-2010, 02:26 PM   #14
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You should just get a photobucket account and host them that way. It even gives you the img code to post directly here.
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Old 04-18-2010, 04:07 PM   #15
meams OP
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Thanks Kjharn. I just edited my post so you should see rocker arms now (and the bike aswell).

Let me know if it didnt work.
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