I have a stray part and I’m not even finished yet!

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July 28, 2009 at 1:38 am #96892

Trent
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Well it’s not that bad but I’m a bit uneasy about finding a ball bearing on the floor next to the bike last night because I have NFI where it has come from!

Background is as follows:

I’ve mentioned previously that I stripped my oil drain bolt and I’ve just now taken the motor out so that I can get it re-tapped and a helicoil put in. So I set out pulling the motor out using the repair manual for guidance and after removing the rear shock and header I noticed a ball bearing about 4mm in diameter on the ground next to the rear wheel. My rear wheel bearings seem fine (hard to check when the swing arm is off) and they’re only very new so I don’t believe it’s come from there but I can’t figure where else it could’ve come from I’m working on top of an old rug so I’m sure it wasn’t there before also. Heim joint looks all sealed up still so I don’t think it’d be from there if that even uses ball bearings.

So any guesses where it could’ve come from?

For those of you that might be concerned I’m doing this in that shed I previously posted pics of you can relax because I have my own garage finally! I’ll post pics of that when I get some decent ones at the moment I just have phone pictures which are very grainy. I can do a write up on pulling the motor for the KTM section if anyone’s interested but I mostly just followed the repair manual which is very helpful in most cases.

Cheers.

July 28, 2009 at 3:29 am #145499

Fez
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July 28, 2009 at 3:36 am #145504

TheBoss
Member

Fester read this :angry: and everybody else, these rules are going to be in forced from here on in http://www.obtrailriders.com/index.php?option=com_kunena&Itemid=56&func=view&catid=8&id=31222

Good Luck AB I am no help sorry

July 28, 2009 at 4:20 am #145506

Alex
Member

Well said Admin. It’s critical that tech questions are taken seriously even if the questions may seem stupid. Otherwise, the said person will never ask again…. one of my pet hates from “other” sites…

WRT the ball bearing, that bike is a Kato and I’m assuming 2stroke? (just saw the sig – 250excf!) Either way, motor stayed intact… 4mm BB is quite big and for it to escape from it’s race that bearing must be really shagged – if it came from your bike – which in my opinion it did not. Sounds to me like a BB from a bicycle bearing as they love rolling about the place here (cheap sht).
So no, I can’t think of any BB that big on Katos apart from the wheel bearings which shouldn’t “fall out”.
Hope that helps ease the anxiety.

July 28, 2009 at 4:23 am #145510

Trent
Member

Cheers. Nah its 250f as per my sig. I’m going to give the bike a good going over while the motor is out so hopefully I might get a better idea.

thanks for the help so far guys.

July 28, 2009 at 5:11 am #145505

Fez
Member

I will now try to help to the best of my knowledge. I have had a similiar find on the floor of my workshop and the BB ended up being out of the straight bar and socket set I was using to take off my rear wheel. It may simply, but may be worth a look.

July 28, 2009 at 5:21 am #145512

murph the surf
Member

Hey Austblue
When I did my sump plug helicoil job on the 525, I didn’t have to take the kickstarter off to remove the engine. It could be out of the kickstarter if it was removed. They have a BB and a spring that sits in a notch to keep the kicker out of the way when riding.
Thats my 2 cents worth.:unsure:
Good luck mate
Murph

July 28, 2009 at 5:32 am #145513

Trent
Member

You might be onto something with that! I had taken the spring off the foot brake lever and removed the rear master cyl. Is there a bearing in that? I’ll take a look in the manual now.

July 28, 2009 at 6:24 am #145500

Brendon Carre
Member

Hey austblue, I know this wont help you now but when i did my sump we layed the bike over and pushed a rag up the sump and then drilled and tapped the sump hole very carefully removed the rag fitted helicoil and sump plug stood the bike up and all was good. Cant help with the ball there is one on the kickstarter but you havent removed that so cant be that one. Hope you find where it lives, good luck.

July 28, 2009 at 6:50 am #145501

drew
Member

Hey AB,

my suggestion would be to go through the parts book if you have it, the one with all the exploded views.

see if you can find all the bearings it that and find them on the bike and as you have done inspect them.

but as most are saying it is unlikely to be from inside the engine.

and if it was from a bearing on the bike it would be easy to see where it had come from because something would be really loose or making all sorts of bad noises.

did you remove the kicker?

the head stem will be a tapered roller so not from there, but that’s obvious:blush:

the only other thought is if someone had used the BB to block off a breather/ vent hose.?

hope you get it sorted!

July 28, 2009 at 8:32 am #145522

David
Member

What about the clutch slave cylinder, there is a ball that pushes in between the rod and the cylinder it self……I think….have you removed the slave cylinder and just left it hanging…..just check the exploded views and you might find what I am talking about, I will check here and come back to you

July 28, 2009 at 9:54 am #145528

David
Member

Ktmrat wrote:

Quote:

What about the clutch slave cylinder, there is a ball that pushes in between the rod and the cylinder it self……I think….have you removed the slave cylinder and just left it hanging…..just check the exploded views and you might find what I am talking about, I will check here and come back to you

No I am wrong about the ball being here my man, I have checked and the two piece shaft with ball bearing has changed to one shaft and no ball bearing and one thrust needle bearing, sorry Mate I will keep the thinking hat on:(

July 28, 2009 at 9:24 pm #145511

Greg
Member

Hey AB check the ends of you extensions and ratchet, you know the ball holds the sockets on

TB

July 28, 2009 at 10:39 pm #145645

Fez
Member

Trailboss wrote:

Quote:

Hey AB check the ends of you extensions and ratchet, you know the ball holds the sockets on

TB

There the bits I was talking about earlier.

July 28, 2009 at 10:42 pm #145660

Greg
Member

Uncle Fester wrote:

Quote:

Trailboss wrote:

Quote:

Hey AB check the ends of you extensions and ratchet, you know the ball holds the sockets on

TB

There the bits I was talking about earlier.

Sorry Fes my bad, I was actually posting for micknmeld who told me on the phone this morning and he couldnt get through, I should have read the whole post again and checked.

Still hope something helps AB

TB
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