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Old 09-14-2014, 09:02 PM   #1
Jd87 OP
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Question Tw200 rebuild time

I purchased my 2002 tw at 2750 miles with a oil leak and Puking gas down the thoat of the carb. Put a new side cover gasket on to fix the oil leak and change oil filter and oil. Little bit of crap on the oil filter but figured it was from the clutch. The previous owner had switched the fuel line and evap line. Started it and it ran slightly rich but sounded good. Took the carb apart and found he put the spring under the clip on the needle instead of on top. Put it back together and it runs great! Put a bigger back sprocket on it and go hunting. Halfway thru the trip the battery goes dead. Get home and test it and its not charging and the battery is shot. Replace battery with new fully charged battery and its still not charging. Turns out to be the stator so I replaced that and it's charging now. Great I can take it back up with me! Ride all weekend and everything is good. Change the oil again today to switch to Mobil 1 and there is all kinds of metal and black stuff on the oil filter but the screen was clean. It doesn't make any noises other that a little clutch noise like my ktm 500 and drz400 make. It runs fine to me. Just for fun I pulled the spark plug and it looks fine but the top of the piston looks horrible and the cylinder looks good from what I can see. I can still see the factory cross-hatching. Grrr no wander I got it for so cheap. It has 2950 miles now. I have no problem rebuilding it but I was hoping it would make it thru hunting season. Guess i have to ride my Drz but the tw is perfect for what I use it for!
So I wander where the particles came from? What would make the piston look like that? Only a couple real small pieces were magnetic. Ok my rant is over....sorry

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Old 09-16-2014, 08:28 PM   #2
Jd87 OP
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Any know where the stuff in the oil filter came from?
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Old 09-16-2014, 08:46 PM   #3
jtstalker
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I just rebuild my tw200 at 19000 miles. The lower connecting rod bearing failed. If it runs good, i would just change the oil and clean the filter good and see that happens. Hopefully its just crud left from break in. Does the crud stick to a magnet?
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Old 09-16-2014, 09:28 PM   #4
Jd87 OP
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Some small particles stick but most of it doesn't.
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Old 09-17-2014, 03:51 AM   #5
JohninVT
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Quote:
Originally Posted by Jd87 View Post
Some small particles stick but most of it doesn't.
Doesn't look like steel. It looks more like the PO stalled it in a giant mud puddle.

That could also be the reason he had the carb apart.
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Old 09-18-2014, 10:29 AM   #6
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If it's running fine, not smoking, and not making any lower end noises, I'd leave it alone and just ride it. If you're worried about any residual crud in the case, you could flush it with diesel and then put fresh oil in it.
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Old 09-18-2014, 01:01 PM   #7
montesa_vr
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Quote:
Originally Posted by chaddhamilton View Post
If it's running fine, not smoking, and not making any lower end noises, I'd leave it alone and just ride it. If you're worried about any residual crud in the case, you could flush it with diesel and then put fresh oil in it.
  1. monitor you oil consumption
  2. monitor your compression
  3. change oil often and see if the particles are reduced
I wouldn't tear the engine apart just because of what you've seen so far.
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Old 09-18-2014, 03:29 PM   #8
motorat
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that stuff looks like the bottom of a river crossing.
PO probably came up short crossing a river got scared and dumped it.
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Old 09-18-2014, 06:06 PM   #9
NJ-Brett
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That is funny!
You should see the crap that came out of my XT200 motor, chunks of gears, and it used half its oil in a 50 mile ride.
It had a sock for an air filter and a lot of sludge in the carb and gas tank.
Some cleaning and some new rings and a good hone and it runs great.
I had to replace a kick start gear with a missing tooth, and get lights, but for a very low cost the bike runs fantastic.
It does not smoke or use oil, even though the bore is shot, it rattles like its coming apart at any moment, but never does.

I change the oil often and do not worry about it.
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Old 09-18-2014, 06:09 PM   #10
byron555
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#1 on the diesel flush

Quote:
Originally Posted by chaddhamilton View Post
If it's running fine, not smoking, and not making any lower end noises, I'd leave it alone and just ride it. If you're worried about any residual crud in the case, you could flush it with diesel and then put fresh oil in it.
I bought a XR650L that was in a flood for dirt cheap ($525) Flushed the engine with diesel 1st (used the starter motor to circulate, but did not start it), then ran an ATF & motor oil cocktail for about 10 minutes. Then I ran super cheap walmart oil for 2 really short (100 mile) intervals. That with the carb cleaning gave me a great running bike till I sold it 4 seasons later.
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Old 09-18-2014, 07:59 PM   #11
Stephenmarklay
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Its likely fine.
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