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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 05-21-06, 05:29 PM   #1
Mr. Fierte
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God, I love working on bicycles!

Give me a chain to clean & lube any time. Give me a bottom bracket to grease just for the fun of it. Never, never complain about maintenance on a bicycle.

This is what my Son brought home for me to fix today

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Old 05-21-06, 06:18 PM   #2
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Drill a hole in the bottom of that bottom bracket - then it won't fill up with water like that when it rains.
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Old 05-21-06, 06:30 PM   #3
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I love working on my bike.... so much that the first BikeForums group I read is Bike Mechanics.

What is that thing? Looks awful!

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Old 05-21-06, 06:33 PM   #4
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Looks like somebody did not quite make a stream crossing.

Always test the depth with a big stick first!
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Old 05-21-06, 06:44 PM   #5
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A little Tri Flow and it'll be good as new.
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Old 05-21-06, 06:57 PM   #6
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that has to be eithor a motorcycle or a car part...
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Old 05-21-06, 07:31 PM   #7
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Hmmm....JB welded (but broken again) clutch cable stop.....and that there piston has got a hole in the side.....

Looks like you're in for some fun.
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Old 05-21-06, 08:31 PM   #8
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Make him drink it.
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Old 05-21-06, 08:42 PM   #9
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A little Tri Flow and it'll be good as new.
NO, NO, NO!!! WD-40 (water dispersent 40).
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Old 05-22-06, 01:45 AM   #10
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IMHO if your son is old enough to do that he's old enough to fix it.
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Old 05-22-06, 02:35 AM   #11
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The top of the piston looks pretty badly warped, or is that just the angle of the photo?
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Old 05-22-06, 05:58 AM   #12
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Yep, that's what happens when you bury a KX250 motocrosser in a 3 foot deep mud hole. And I do mean bury, where nothing but one end of the handlebar is visible. That's the piston and rod sticking up out of the crank case which is filled with muddy water. The man who suggested WD40 wins the grand prize. A four stroke motor would have been a write off but 2 strokes are wonderfull contraptions. After flushing with clean water, then filling the crank case with WD40 and finally flushing with gas/oil mix it's good as new, well almost. But now I have to go through every bearing from the steering head to the swing arm and wheels. Fun, fun, fun! Like I said, never ever complain about how hard it is to maintain bicycles!
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Old 05-23-06, 08:11 AM   #13
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You, sir, deserve one helluva Fathers Day present!
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Old 05-23-06, 08:23 AM   #14
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IMHO if your son is old enough to do that he's old enough to fix it.
haha. yep - exactly.
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Old 05-23-06, 08:27 AM   #15
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I once got my Hodaka (100cc 2-stroke) a littletoo deep and sort of squished the piston. (water does not compress) About 20 bucks for a new piston, ring, top-end bearing and gasket (1974 or so) and it was good as new.

I havn't found any water in a BB yet, but I did remove a dead hornet from one...
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Old 05-23-06, 09:23 AM   #16
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looks like... some sort of piston? from a car?

I have no idea
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Old 05-23-06, 10:45 AM   #17
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I did that once. Had a hooker on the back. Wheelied into a previously shallow creek. She was not impressed. Once the water gets immulsified, kerosene is your friend. Only in the PI.
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Old 05-23-06, 03:36 PM   #18
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I did that to my brother in laws 250 once. I buried it in a hole that he said was not that deep. Only the bars were showing. We did the same thing. Brought it home flushed it out and fired it up. Ran OK once everything dried out. 2 strokes are pretty tough to kill. I have seen outboards in fresh water submerged for a few days come out and run once flushed out. Salt water is a different story.
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