Name That Sound

[The Disapproving Brit]

My local garage have told me it's at least a month before they can even look at it, and they reckon it might be throwing good money after bad to even get them to look at it. So I bow to the BCF experts.

https://www.youtube.com/watch?v=Ol4TOU3d1RQ

The backstory:

A few weeks ago, I changed the oil and oil filter with fresh 10w40. When I drained it, only about a litre and a half of oil came out. I filled it with the manual specified 2.6l, which took it to between the lines on the sight glass. A few days after, the starter made a strange clunk sound when I tried to start it. Give it 15 seconds, and it started without a problem.

On Tuesday, it had a good 100 mile rideout, and didn't give me a moments trouble all day. On Wednesday morning, I tried to start it to go to work. It made the clunk sound again, and then when it started, it sounded like this. Since then, the starter tries but fails to start it until I've bumped it. When I try and bump it, the back wheel seems very keen to lock up.

I've had a look at the starter clutch after suggestions from here, and although I don't have a clue what I'm looking for, nothing seems to be loose or damaged in there. Also, the starter clutch is on the right. The knocking comes from the left, and only when it's leaning to the left.

The fact that the knocking only happens when it's leaning makes me thing that the starter has knocked something loose, which is now rattling around and making a noise. I have a sinking feeling I'm about to become intimately acquainted with the crankcase, and the long list of things that the service manual tells me to remove to get at it.

Can anyone suggest any things that are doable in my backyard before I put a cover on it until I can borrow a garage?
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Current Bikes: 1983 Honda VF400FD / 2003 Honda VT750 Shadow
Bike Test Passed 18/03/09, Car Test Passed 14/05/13

[TheSmiler]

No idea about the noise but which garage did you go to
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CB125>CG125>GN125>ER5>K100RS>R1100RS>K100RS
A2 completed 23/07/15 Ready for the Golden Crisp Packet

[The Disapproving Brit]

[RhynoCZ]

Did these have the emissions control system, that was on californian version of NC27? It does sound similar to what I've experienced when the hose of this system blew on mine. Took it all out and sealed up, worked great.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[TheSmiler]

[misscrabstick]

Even ignoring the leaning over bad noise, even upright it sounds proper fucked to me, like the valve gear is busy grinding itself to bits.

I think you need to accept that the engine will need to come apart for a better idea of what disasters lie within.

[nisp]

agh sounds fun........ I had this kind sound with my cx literally last week,

Thought it might be the cam chain,
turned out the crank was really really worn and got to the point of pummelling the big end shells in to chunks, it's actually quite amazing really.... Totally knackered the crank and needed to find another one.

out of curiosity can you see the oil and if theres any metal particles in it? to see if anything is grinding inside?
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Suzuki TS 50 1999 Honda CB 125 t2 1981 Yamaha XJ 600 s Diversion Honda cx 500 MZ ETZ 250 1985 Yamaha FZR 400 1981 Suzuki TS 185 1984 Triumph bonneville 790 2001 MZ TS250 1979 Suzuki sv 650 1999 KTM exc RFS 450 2007 Hercules mx 125 1976

[Nobby the Bastard]

Sounds like the crank is fucked.

In techincal terms, Bottom end is knocking....
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[wilz1234]

[Nobby the Bastard]

[wilz1234]

[Nobby the Bastard]

Forget the leaning, just listen to the noise.

It's knocking.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[serlant]

Sounds fucked. I would NOT start it again until you have A taken the cam covers off and made sure the cams haven't lunched themselves and B drained and strained the oil checking for particles, does sound like big end bearing has gone.

Edit: not unlikely low oil pressure has lunched big end bearings and top end at same time.
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04 CBR1000RR, 1995 Husqvarna TE410, 1998 VTR1000(Sold), 1990 XJ600(sold), 1996 KH125(dead and sold)