Anyone else got any ideas?

[midlifecrisis]

So Ive got a few pictues to share with you guys. Warning, these are nasty, not for the faint at heart.

 

It appears as like a roller bearing is stuck into the top of the left piston dome, but I cant figure out where it has come from. I know the vitos crank bearings are a lot bigger than what this guy is, it looks more like a wrist pin roller, problem is, Im not missing one.

 

Anyone got any ideas of where this has come from other than the piston wrist pin? Inever checked the pipes before I reinstalled them.

 

I just installed new crank, rods, pistons, cylinders, head etc..... so?????????

 

http://s752.photobucket.com/albums/xx162/amidlifecrisis/Bashed%20piston/

[xX JAMMER Xx]

oh wow man thats horrible!

i am stumped at what that may be or where it even came from for that matter.

[bbcmudtruck]

[Building my First]

Looks like a rod bearing. The wrist pin rollers aren't near that big.

[#1JUANstunna]

It almost looks like the electrode out of a spark plug but it's not missing in the pictures. Maybe it was in the pipe or who knows. Maybe a banshee grimlin just got in there.

 

How many hours are on this top end? The intake side on the non damaged piston is are scratched up.

 

That sucks!

[RedStrapperRacing]

You mentioned just installed new crank, rods, pistons, cylinders, head etc.. - what was the reason for complete top & bottom end rebuild? Did you have a bad crank bearing when the old parts were removed? Maybe one of those lower needle bearings were malingering around in there some where and snuck past ya during re-assembly?

[midlifecrisis]

It almost looks like the electrode out of a spark plug but it's not missing in the pictures. Maybe it was in the pipe or who knows. Maybe a banshee grimlin just got in there.

 

How many hours are on this top end? The intake side on the non damaged piston is are scratched up.

 

That sucks!

Yeah, those scratches are from running a fuckin K&N shitpile filter. I have upgraded since then.

The bike has 5 minutes on this topend, just to make it a lot worse! As for the size of the bearing, I was told by the canadian distributor for Vitos, the crank bearings are 5-6mm in diameter, and this (bearing?) is an exact match in size to one of the wrist pin needle bearings?

[#1JUANstunna]

Man that really sucks! I have never had a problem with k&n filters before. Did you check your old wrist pin bearings to see if one was missing? Maybe some how one of those sucker got back in there on re assembly.

[shakar]

ah man....... sorry to see that happend , that sucks balls when it happens to ur old stuff never mind brand new .did u even get to ride it?

Edited June 9, 2010 by shakar

[toytech]

Yeah, those scratches are from running a fuckin K&N shitpile filter. I have upgraded since then.

The bike has 5 minutes on this topend, just to make it a lot worse! As for the size of the bearing, I was told by the canadian distributor for Vitos, the crank bearings are 5-6mm in diameter, and this (bearing?) is an exact match in size to one of the wrist pin needle bearings?

 

that sucks, but I think that those scratches are from not enough piston clearance looks like piston seize to me, I've run K&N filters for years with no problem but you always need outer wears on them, Good luck with the new motor hope it goes ok.

[06specialedition]

Thats no good. Yeah I've ran K&N's on all my bikes and never had a problem.

[bansheesandrider]

I can't tell from the picture, have you taken the piston off the rod and looked at the wrist pin bearings? I have had new bearings where the some of the needles were not properly inserted in the cage when being manufactured and it could have fallen into the cases during assembly.It is not a big deal if you catch it before assembling the topend, just push the needles into the cage properly. If you don't catch it then you can see the results.

 

If you did the previous rebuild because of a crank failure, then it could have been hiding in your pipes. I always flush out my pipes with solvent when doing a rebuild after a catastrophic failure.

[RedStrapperRacing]

I can't tell from the picture, have you taken the piston off the rod and looked at the wrist pin bearings? I have had new bearings where the some of the needles were not properly inserted in the cage when being manufactured and it could have fallen into the cases during assembly.It is not a big deal if you catch it before assembling the topend, just push the needles into the cage properly. If you don't catch it then you can see the results.

 

If you did the previous rebuild because of a crank failure, then it could have been hiding in your pipes. I always flush out my pipes with solvent when doing a rebuild after a catastrophic failure.

 

X2 on flushing the pipes - seen a buddy learn the hard way one time, thats all it took for me.

 

Damn that sucks - don't even sound like he got to ride the Shee before it had a heart attack

[midlifecrisis]

Yeah so I took the motor out tonight and split the cases ( if nothing else, Im getting good at that), and found no signs of any metal shards in the bottom end. The wrist pin bearings as stated before are all accounted for, as are the bearings from my previous pistons.

 

The bike never blew up before, but a bunch of mods were done to it over the winter, as it had a slight case of detonation (I know all detonation is bad). The previous owner had the bike lean out on him when it was -30. He also caught it right before the crank bearing had a failure, so theyres some good news.

 

I cannot for the life of me figure out where that little bitch has come from? Anyway, the cases are clean again, going back together again tomorrow, with a few more things added, and the cylinders are out being honed for safety, even though they were still smooth. I wanted to double check the hone size with the local shop, to ensure the right size pistons and rings were going to be installed, so we'll see what they say.

 

Thanks guys for all your help. And no, I still havent ridden it, only started the break in! BOO HOO!

[AKheathen]

um, that scoring did not happen from 5 min on a k&n filter..........it would either be something you did rebuilding, or problems on break-in, like incorrect clearances for that specific piston, jetting, or simply a result of that pin beating on the top, trying to rock it. now, did you check the locator pins off both cranks, if the vitos even used them? did you thouroughly inspect every part before installing, pipes aside? that pin could have been magnatzed and stuck to one thing or another, or been stuck to a messy tube of sealant, glove, grease, or whatever. hell, if you had that k&n sitting around exposed, all kinds of shit can end up in there, or using the airbox to hold parts, which it works good for. i'm not trying to talk down, just sharing past experience and observation. even this winter, i had my flywheel on-off 20+ times in 3 weeks, and got so efficient at it, i didn't even need to check the flywheel over every time i put it on.....well, i kicked once, and it fired up a couple times, then just stopped....it wouldn't kick after........turns out, there was a rear hub nut stuck to the inside, and trashed a stator i had just spent 3-4 hours and $20 in wire, etc rewinding. to me, that was an $80+ stator, and flywheel, so, that one oversight cost me about $200/sec.........long story short, that pin came from somewhere, and there is a igger problem than running a k&n....