That could have ended badly....

[chrisw]

Currently rebuilding my CB750 engine, this is what's left of the big end bearings (GL1100 bearing added as a reference).

https://i.imgur.com/MqEvq.jpg

Looks like the last person to do this put the wrong sized bearings in.

[Pete.]

Would not have lasted long if they did. Looks like plain and simple wear to me, with a touch of oilchange neglect thrown in for good measure.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[chrisw]

[U_W v2.0]

bit like me then because i have to ask.

that do those things do in an engine?

(gimme a break, im new to all this lol)
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BCF's biggest cunt list: Cansa, Pits, Rob

[Sako]

[U_W v2.0]

lol this could spiral into a million questions which would leave with a very intimate knowledge of engines as i have no idea what a power band is or what that does and how it in turn affects those metal things lol
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BCF's biggest cunt list: Cansa, Pits, Rob

[totalllama82]

Those are the bearings that the crankshaft rides on. The crankshaft is the shaft that the pistons connect to at the bottom end of the engine. The shaft, besides being connected to the bottom of the pistons, is connected to the clutch at one end.

The bearings you see assist it turning in the engine casing. They shouldn't look like the OP's picture though!
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Gone: Haotian HT125-8 / Yamaha YZF 600R Thundercat / Kawasaki ZX9R C2
Current: Kawasaki ZZR 1400 A7F

[Paris2]

[chrisw]

Google can answer everything....

[flumpy7]

[Sako]

here is a powerband - https://i136.photobucket.com/albums/q187/FoxMulder_R/powerband.jpg

[U_W v2.0]

ah well, like my first post on the thread says,

im new to all this!

bound to fall for jokes and general stuff like that. all good and fun though
____________________
BCF's biggest cunt list: Cansa, Pits, Rob

[flumpy7]

[pendulum]

GL1100 bearing looks twisted
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1998 CG125 (Sold) CB500 [+ Clio 172]
Usually_Wrong: I tend to fail more than pass. [Speaking about Theory Practice]
Usually_Wrong: im on unemployment at the moment

[yen_powell]

[Beelzebob]

[totalllama82]

[sickpup]

Are those the top shells by any chance?

[chrisw]

[mentalboy]

Only takes a short while with a lack of oil to do this, think how much friction is created in there when that crank's lobbing round at red line revs, once that crank grips them 'cos she's dry they'll just spin.
Are the faces good? I've recently done a 'Blade that looked a lot worse and ended up throwing away the crank - got any friendly old timer engineers nearby who'd make sure it's still true, always best to check for the cost of a couple of pints!
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Make mine a Corona.

[Cheeseybeaner]

[bunglehaze]