What damage can a top end bearing do?

[HD]

Okay so I have rebuilt my bike (details here)

Basically there is a ticking noise at very low revs on my bicycle. As soon as I rev it, it goes.

While rebuilding the bike, we didn't do the top end bearing. As far as my dad could tell, the bearing was fine.

Still not 100% it is that. Could just be the exhaust being a bit tinny while ticking over but yeah.

So:

a) what else could it be?
b) what damage would it do if it has gone?

Thanks guys
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Rusty '02 Vito Camper + CBR600F3

[Raffles]

Tappets?
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A good loser will always be a loser.

[MaybeGuy]

[HD]

What are tappets?

And will get a recording tomorrow.

We were gonna do it but I forgot to order one. We were then rushing to get the top end back on and cos my dad reckoned it was okay, we just forgot about it.

I forgot to mention it isn't constant either, it is kind of like doin git all the time while it is ticking over but not as such repetitive, say you count out 10 seconds it may do it 4 times once and 8 the next if you see what I mean.

Hard to explain and Im probably making it more confusing so take no notice of that.
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Rusty '02 Vito Camper + CBR600F3

[MaybeGuy]

sounds like it could be idling a little too low? its possible...
2 strokes arent the quietest engines anyway.

tappets are on 4 stroke engines. hence why that guy is a div.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[fiery tupp]

Probably just heating up ?
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If you can't fix it with a hammer , use your head .

[HD]

[MaybeGuy]

yeah, it should be idling at about 1500-2000rpm. not close to dying. try and find videos on youtube and make it sound like that
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[HD]

[Raffles]

[Teflon-Mike]

Its a 50cc two-stroke. Little end bearing, if it let go, could seriousely mash the engine.
Without the rollers in teh con-rod little end, conrod stands to get bent or broke, hardened rollers are likely to get into the ports, get dragged between piston and bore; snag in the bottom end bearings.....
Ie: can make a pretty nice mess of the whole shibang......
Worst case..... might do no more than make some nasty noises, and leave some debris in the crank-case..... you never know.

BUT, I suspect the noise is knocking.

You made comment about how its been semi-de-restricted, and you haven't messed with the carb.

Tune a bike, to makle more power, its going to need more petrol in the charge to make the extra power.

Tuning it, so it can drag more air in, without re-jectting will normally result in more air, same petrol hence a weak mixture, and that leads to funny knocking noises, known as 'knock'; or pre-ignition.

If your getting that at idel..... dont ride the damn thing! Put it under load and its likely to go incredibly weak and start melting pistons.

I think its back to your original connundrum of getting the jetting right for the mods you've made......

But I haven't heard it so could be barking up the wrong tree.
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My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?'

[MaybeGuy]

[Blue_SV650S]

[HD]

[MaybeGuy]

from the video i'd say it sounds pretty sweet. can you pick out the sound you're hearing from the video?

after reading your older thread, i'd say you're being a bit hopeful about the bike.

it's only a 50cc. 20mph up a hill sounds about right.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[HD]

The sound from say 0:08 in the first bit. there is the usual sound then a tapping

And really? Thats shit cos everywhere around me is hills Guess Ill just have to get onto the flat then!
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Rusty '02 Vito Camper + CBR600F3

[MaybeGuy]

ah right. didnt watch the first video.
then again im on laptop speakers.

also, is that keyham?
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[HD]

[MaybeGuy]

the less you run it, the more likely you are to be able to get away with re-using the base gasket if you do need to do the small end.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[HD]

[MaybeGuy]

if its the small end, it'll cost you a base gasket and a bearing. possibly a gudgeon pin.
why waste £15 on a full set when you dont need to?

impossible to tell for definate from a video. sounds about right with the tapping from the top end in my experience though
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[HD]

So you reckon I should just nip to Two Wheels and ask them what they think on Saturday then?
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Rusty '02 Vito Camper + CBR600F3

[MaybeGuy]

mechanics and garages are fucking scum. dont do that, unless they just listen and dont charge you.

i could have a look i guess, but not at my house like you suggested before. i could do without some cumslut nicking my bikes
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[HD]

[P.]