450l with a knock of some kind

[r00ster_c0gburn]

i keep hearing a knock of some sort coming from what sound's like the left side. my crappy video didnt pick up the noise... the knock only comes when it is warm. so my curiosity got the better of me today and i took the oil pan off. and this is what i found.



the flakes are of aluminum i believe they aren't magnetic. so i was wondering what you all thought? i am thinking the wrist pin is floating around and catching something after it heats up..
what do you think it could be before i tear it all down and just look?

r00ster

 

[Charlie G]

I haven't any idea, but then I'm not an expert. It dosen't look good. I hope someone pops in says it's something simple. Wonder what a clutch basket is made of and if it could get chewded up?

cg

 

[r00ster_c0gburn]

I haven't any idea, but then I'm not an expert. It dosen't look good. I hope someone pops in says it's something simple. Wonder what a clutch basket is made of and if it could get chewded up?

cg

i ain't no expert either, i know them shavings don't look good. i took the side covers off and all looks good to me. there is no obvious marks or that any thing is loose. there wasn't any shavings in either of the side covers just in the pan.
here is my clutch...


and the stator...



does any one else have any ideas where this metal could be coming from? it is not magnetic so i think i can assume its not a bearing, but like i said i am no expert by any far stretch of my imagination...

thanks

r00ster

 

[Charlie G]

Rooster,

You might want to post a thread in another section , as not as many people wander through the 2 cylinder area. The picture of the pan is not real clear, can you get a better one up?

cg

 

[tkent02]

It's got to be bearings, either from the cam bearing or caps or the mains. Gears and things are magnetic, pistons don't usually shred like that and still run well. This engine has plain bearings on the crank, yes?

 

[Charlie G]

It's got to be bearings, either from the cam bearing or caps or the mains. Gears and things are magnetic, pistons don't usually shred like that and still run well. This engine has plain bearings on the crank, yes?

Yes, plain bearings.

cg

 

[Guest]

Were you able to isolate the knock to an area of the engine? Other than just generally the left side I mean...

If the wrist pin was floating around, I would imagine that would do more than just knock, but I may be wrong.

 

[r00ster_c0gburn]

Rooster,

You might want to post a thread in another section , as not as many people wander through the 2 cylinder area. The picture of the pan is not real clear, can you get a better one up?

cg

here are some hopefully better pic's of the pan.







@pete
it was loudest on the stator cover... it could be heard from the clutch cover and valve cover but not as loud as the stator cover...
you are probably right about the wrist pin idea i had... some times i throw ideas around with out thinking about them first...;-)

@tkent02
i was hoping it wasn't bearings... guess i will have to tear it down and see witch ones... i am assuming it's the caps or mains because there was no metal up top when i adjusted the shims...


thanks guy's
r00ster

 

[Guest]

Hmmmm... only two things in behind the stator cover there... crankshaft and counter balance shaft.

If that's where the noise is from I'm afraid your going to have to start pulling it apart...

 

[r00ster_c0gburn]

well i tore it apart, and the left connecting rod bearing had spun...:-(

here is a pic the one on the left is from the left connecting rod and the one on the right is you guessed it is the right connecting rod bearing...



as you can tell i am not the greatest photographer, but you can see a lip on the left bearing where it was banging around...

 

[Guest]

Ouch! That don't look good... but at least you found it!

 

[Charlie G]

rOOster,

Are you going to get new bearings and fix it up?

cg

 

[r00ster_c0gburn]

rOOster,

Are you going to get new bearings and fix it up?

cg

yeah...i'm going to... might take a couple weeks to get everything together... until then i am going to clean and paint a few things... try my hand at polishing the side covers, and get a new cross over pipe made for my exhaust. hopefully by then i can put it back together...;-)

r00ster

 

[Guest]

Do all your O rings and oil seals at the same time, replacing those 30 year old ones now will save you trouble down the track

Oh, and use an OEM base gasket!

 

[tkent02]

Pay attention to the oil pump and passages, make sure oil is getting every place it's supposed to. Something caused the old bearings to fail, it would be a shame if the same problem caused the new ones to fail right away.

 

[r00ster_c0gburn]

well got my 450 put back together and it is running... painted it high temp black. i left the side covers aluminium almost polished... i will post some pics and a new video of it running...

 

[Charlie G]

Nice to hear your having sucess.

cg

 

[Guest]

Good stuff! Lookin' forward to those pic's

 

[Guest]

Hmm,

I posted this a while ago.
http://www.thegsresources.com/_forum/showthread.php?t=172854


I was under the impression that a crank that spun a rod bearing would not be trust worthy.


I'm very interested in how its going to work out


What normally causes this ?

I mean starting the bike and reving the Pi$$ out out of it would do it,

or overheating it

or very old and contaminated oil

or clogged oil passage,,,, but the bearing is after the oil filter

 

[r00ster_c0gburn]

Hmm,

I posted this a while ago.
http://www.thegsresources.com/_forum/showthread.php?t=172854


I was under the impression that a crank that spun a rod bearing would not be trust worthy.


I'm very interested in how its going to work out


What normally causes this ?

I mean starting the bike and reving the Pi$$ out out of it would do it,

or overheating it

or very old and contaminated oil

or clogged oil passage,,,, but the bearing is after the oil filter

i am not sure what caused it on this bike, cause i bought it with out hearing it run and it didnt have any oil in the case when i checked ... i was told by the p.o. that the rr was bad, but that was not the case... the right side plug was dead and the carbs were needing a good cleaning... only after new oil and plugs and cleaning the carbs did i notice the knock, and then it was only after it warmed up it could be heard... i am thinking maybe (i dont really know just a guess) that a combination of over revving and only running on one side caused the bearing to fail... or maybe the p.o. started it with out oil???
i checked all the oil passages for blockage but they were open and the pump was ok (so say the dealership) so i am hoping all will be fine... right now it sounds good so hopefully it will be fine... i have my fingers crossed...