Keeway Superlight 125cc makes a horrible noise when in third

[Rooz12]

Hi,

I have a Keeway superlight 125cc and I went to take the bike for the MOT this morning and I heard a horrible noise in the 3rd gear.

it sounded like the chain was gonna come off!

I turned around and cancelled the MOT.

I've put the bike on the center stand and started it and put it in the different gears to see whats going on and where the noise was coming from and I found out that the noise is from somewhere near the small sprocket close to the engine!

This noise gets much louder if im moving the bike but it is still very noticeable even when the bike's stationary and it only happens in the 3rd gear.


Please view the video attached:

https://streamable.com/d8lrwx


The bike doesnt slip out of the gears so this can't be a clutch...

what is the the issue here? and what are my options?

Thanks in advance.

[Nobby the Bastard]

Picture of the whole chain please.
____________________
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

[Rooz12]

[Nobby the Bastard]

That chain is fucking minging. Have you ever lubricated it?
____________________
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

[Rooz12]

[Rooz12]

[Nobby the Bastard]

Are there any tight spots on the chain?

Measure how much slack there is In the middle of the chain run with the chain rotated every 6 inches or so. It looks a bit slack to me and seems to jump on the top of the run every time you changed gear.
____________________
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

[Rooz12]

[Nobby the Bastard]

[Rooz12]

[Nobby the Bastard]

[Nobby the Bastard]

What does it do when it's running and in gear?
____________________
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

[Rooz12]

[Nobby the Bastard]

In that case your gearbox is fecked.
____________________
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

[Rooz12]

[steve the grease]

Just put a chain and sprocket set on it - cheap enough from Brooksbarn, Wemoto , or similar. The engine sprocket wears much faster than the big one on the rear , it will be trashed , the chain is worn and stretched and trying to jump off the teeth of the sprocket. 25-30 quid for the parts.
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All the above is my personal opinion, you can see my lips move, but I'm talking out of my arse.
I've been riding, and fixing , bikes for 50 years, in that time the more I learn, the less I am absolutely sure of.....

[Easy-X]

Bit hard to hear over the engine but if it's making noises in certain gears without even a chain then it points to the gearbox

The general state of the bike is not great. Sorry to say but unless this is "a way to pass the time" sorta project you're probably better off throwing it in a skip. The only good news I can give you is it's a pretty generic engine so parts probably not an issue if you do take the engine apart and find, for example, a gear missing a tooth.

On that did you find any bits of metal when you drained the oil?
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Royal Enfield Continental GT 535, Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[WD Forte]

"The bike doesnt slip out of the gears so this can't be a clutch.."

Wrong I'm afraid, the clutch doesn't keep it in gear it has things called detents to do that
the clutch helps you get into gear

"what is the the issue here? and what are my options?"

I reckon if it were the chain it would be noisy in all the gears
My guess is internal damage to the gear teeth/shafts

If you dont want to strip it and try to find parts to fix it
Its a 157FMI engine so used on quite a few bikes
not just the KY Cowboy
for example:
https://www.ebay.co.uk/itm/185270838663?hash=item2b2300a587:g:wmEAAOSwRoth8m09
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bikers smell of wee

[blurredman]

Sounds like a tooth has disapeared on the third gear. Someone been grinding their gears? Re-build!
____________________
CBT: 12/06/10, Theory: 22/09/10, Module 1: 09/11/10, Module 2: 19/01/11
Past: 1991 Honda CG125BR-J, 1992 (1980) Honda XL125S, 1996 Kawasaki GPZ500S, 1979 MZ TS150.
Current: 1973 MZ ES250/2 - 18k, 1979 Suzuki TS185ER - 10k, 1981 Honda CX500B - 91k, 1987 MZ ETZ250 (295cc) - 40k, 1989 MZ ETZ251 - 51k.

[Mysteriass]

Replacing the gearbox sounds like a good learning project if you've never done it before. What you'll learn by doing it is invaluable. A chinese bike that "doesn't matter" is also the ideal candidate for a novice mechanic.

Also, prices of 125's are going up, perhaps due to fuel / oil economy (and increasing size of ULEV zones?). I bought a 125 about two years ago for £500 as a commuter, it's worth double that now.

Get a Haynes manual for your equivalent engine. If it's a 157FMI then it's some kind of Honda CG clone. (Some modern CG's have a camchain in I think due to Euro emissions BS - so a CG in name only - part of the CG appeal was getting rid of the camchain) There's also plenty of youtube video's out there of stripping / refurbishing these small engines.

Take a video / pictures of the job as you take the engine apart and put each part in order in a row on cardboard with notes so you can see the order they came out of the engine, then reverse that process as you put the engine back together.

[slowasyoulike]

If it was me I'd not be throwing money at that - I would take a punt on a cheap bottom end (e.g. this one for £40) and a gasket set (about £20) and make one working motor out of what you have.

[Nobby the Bastard]

[WD Forte]

OP ought to mention year and fuel system or there could be some
consequences........................................

https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fmedia.giphy.com%2Fmedia%2F2kSbKYFtEyd1Z8PB0Q%2Fgiphy.gif&f=1&nofb=1
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bikers smell of wee

[redeem ouzzer]

Chuck the chain in the skip, attached to the bike.

What a fucking shed.
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Be a REAL MAN!

[Rooz12]