Bandit

[Louise]

Ok, Sorry I cant find you 'Gaz' on the members search
But following the chat ive got some pics.

To everyone else, I had a new chain fitted a week ago.
It seemed to be ok, but was rubbing - could feel it on the footpegs spesh when breaking.
Anyhoo - I was attempting to Wheelie, first time - few inchs and left it at that.
Today, attempted again - 1st gear, rolling at 20mph, throttle off - throttle on - I must admit I pushed the bike to the limit im guessing.
Heard a really loud cranking/clatter noise from the back - Im guessing its the chaing.
People on other side of the car park even heard it.
Bike was judgering so pulled clutch in to smooth out and come to a stop.
Frightened me to some extent
Check chain, all ok - right tension - Guard isnt loose, all teeth in the front and back sprockets are all there. Hugger isnt touching.
Im miffed and so were a couple of others.
On the way home tonight I stoped, checked for the noise (other post of mine)
Well the noise seems to be comming from the front sproket.
Here are a few pics. Any avice again before I take it to 'another' garage.
Its starting to piss me off now - Im not trusting the bike at all ATM

[Bezzer]

It don't look much of a "quality" chain and you had a new chain but kept the old sprockets??. Front one doesn't look too bad but the rear one is wearing, you usually fit sprockets and chain together otherwise you can get excess wearing of both/either as the new chain beds into old sprockets. It was probably the vibes caused by this you felt through the pegs. The "noise" could be that as well or are you certain the chain tension is right by the book and not too tight.
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I used to be indecisive but now I'm not quite so sure.

[hmmmnz]

id say by looking at the photo (not that i can tell much from them)
that your chain is far too tight,
when you sit on your bike you should have 1/2 inch slack, (up and down)
that looks like its got no slack and no one is even sitting on the bike,
when you sit on it you are tightening it even more and the chain is probably catching on the edge of the sprocket as it moves past it,

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[goatrider]

Yep - I would agree with the above comment about chain tension. Chain looks like it has no slack in it at all. Might be a bit out of alignment too - check the adjuster marks on the swingarm where the rear wheel spindle goes through it - they should be on exactly the same mark on both sides of the swingarm - if they are not then the back wheel is not in proper alignment and the chain will be catching on the sprockets a little.

Put the bike on its center stand (assuming you have one - or a paddock stand - rear wheel needs to be off the floor) and give the back wheel a spin by hand. You will probably find that the chain makes a "clonking" noise everytime a link is taken onto the sprocket if it is too tight or mis-aligned.

It also looks like the chain could use a good bit of decent lube too - it appears very dry to me.

Hope that all helps

Let us know how you get on with the problem.
(apologies if you know this stuff already and have checked it all - i am new to this and just trying to help out )

Goat.
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Honda NS125R 1987, Suzuki GS500EW 1998, Honda CB750F2N RC42 1992
"I dont give a shit who your dad is......quit walking on the water while I'm fishing......."

[goatrider]

Sorry - forgot to say - Bezzer is spot on too.

A new chain on old sprockets is never ideal (but I bet we have all done it - I know I have - lol) and if the chain is a cheaper low quality job then the worn sprockets will kill it pretty quick and will wear the sprockets at a faster rate too.

If the tension and alignment are all ok then the old sprockets could well be causing the trouble.

I have had a similar problem to yours on my GS500 - I fitted a cheap chain to old sprockets (slightly worn but looked "acceptable" to me) and it was noisy and "jerky" as hell - after about a week I got so pissed off with it that I ditched the crappy new chain and old sprockets and fitted a brand new (expensive) o-ring chain and brand new sprockets front and rear - et voila - no more vibes, snatching or horrible noise...

Its definately worth shelling out a bit more cash for a decent chain - like most things in life....you gets what you paid for...

All the best,
Goat.
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Honda NS125R 1987, Suzuki GS500EW 1998, Honda CB750F2N RC42 1992
"I dont give a shit who your dad is......quit walking on the water while I'm fishing......."

[Pete.]

Nothing wrong with putting a new chain on used sprockets, so long as the sprockets are good.

Your front sprocket is shagged Louise, you need to fit a new one. You also need to lube the chain more what you have there is far from adequate. The rear looks to be not bad.
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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

[Kris]

I'd also check that the chain link that was clamped closed when the chain was fitted is not too tight, causing a tight spot.

Find the point at which the chain was closed and see if that particular link moves freely. It wouldn't hurt to check the whole length (I know my chain 'graunches' when the chain has tight spots).
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[Ichy]

Slacken the chain right off with the case off and check the sprocket for any sideways or up down movement. If you can get the chain slack enough to take it off the sprocket then, using common sense, start the bike up and put into gear, check for any odd noises.

[Paddy Blake]

Also check if there is any side ways movement in the rear sprocket as the
bearing in the housing might be on the way out.

Paddy.

[JonB]

Completely un-related from mechanics, but you've only had the Bandit a month tops after having a 125, sure it's sensible to try and wheelie so early?
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Be careful whose advice you buy, but, be patient with those who supply it. Advice is a form of nostalgia, dispensing it is a way of fishing the past from the disposal, wiping it off, painting over the ugly parts and recycling it for more than it?s worth.

[Vincent]

Yep, as above. My bet's on a blown gearbox bearing or rear sprocket carrier bearing. If the garage adjusted your chain too tight I'd take it back to them, but don't tell them about the wheelies

[Louise]

I know, I know but I wanted to try
Anyway took it to a recomended garage, He said the bike sounds absolutly fine
Chain is the right tention, Back sproket looks fine - unsure of the front - didnt have time to check. He rode it, but only up the drive and said it was all good.
The vibrations can be caused by the chain working its way into the sprocket ect ect
He also said as its my first big bike im sitting on top of the engine so I would here lots of different noiseys.
MOT booked for next week, which he will check the sprocket again.

[Pete.]

This sprocket is knackered, it's about to start seriously hooking the teeth. The cutouts between the teeth have gone from having a circular base that fits the rollers of the chain to a flat-bottomed U-shape, with sloping sides, this will cause the side-plates of the chain to stretch and the rollers of the chain to roll-up the sides of the tooth cutout and jump over the tooth, putting enormous stretching-force on the chain and destroying it in short order. You need to change this sprocket very soon or you'll be needing another new chain too. The reason the rear sprocket isn't showing so much wear is because it's about 2.5 times the size of the front so each tooth of the front sprocket gets used 2.5x more often than the rear, plus the load is distributed over more teeth.
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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

[Finglonga]

[Paddy Blake]

Its a new chain Finglonga so there should not be any tight spots.The front
sprocket is going to shorten the life of the chain so i would change it anyway.

Paddy.

[goatrider]

Fair comment, fing - they are only a "guide" and its always worth double checking with a metal ruler from center of spindle to end of swingarm to get it mm perfect....but if one side was on say mark 4 and the other side was on mark 5 then its a good indication of misalignment.

Hope it gets sorted soon Louise.

All the best,
Goat
____________________
Honda NS125R 1987, Suzuki GS500EW 1998, Honda CB750F2N RC42 1992
"I dont give a shit who your dad is......quit walking on the water while I'm fishing......."

[JGY6000]

JUST to let you know on the inside of the front sproket cover there should be a little spring that returns the clutch cable back, yours is missing, this could have somthing to do with your problem!!!

[JGY6000]

https://www.bikechatforums.com/files/spring_116.jpg

[Louise]

I will have new sprokets fitted soon £50 for both including the fitting. Chain has only done 30odd miles, so wont be a problem there. Will double check outside to see if the spring fell out as I took the cover off But sure I didnt see one.

[Pete.]

Louise the rear sprocket looks good enough to last at least the life of your crrent chain, and the front should only cost about a tenner plus fitting. It's no bad thing changing both but it's not necessary.
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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

[Fallen Angel]

Geri is spot with his diagnosis of the front sprocket ... the clatter you heard was probably the chain jumping teeth on the front sprocket ... change it soon as it could knacker your chain quite quick.
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[timjim]

Louise..in the first pic you posted of the back wheel-is that swarf on the back wheel?if so ,try and get the back wheel off the deck and spin the wheel by hand..check and listen for noise,in particular from the back wheel,also check for ant tension or roughness in the drive.The reason i ask,is that i had similar characteristics form my Bandit after a tyre chain and found out that the f###wit let the spacer out between the sprocket carrier and the wheel bearing .Also agreeing with what other people are saying..yes youve got a spring missing(from your bikle).Dont trust the adjuster measurements on the swingarm and dont try and wheelie...its not clever and its more control with 2 wheels on the deck!!!!!Tim

[Louise]

Garage guy tested back wheel seemed fine.
TBH anything like that I would rather not touch untill I read more.
I seem to touch something and it breaks lately.
So spring, front Sproket - Get the garage to do it next week.
T/y Guys!

[Louise]

I need to get to London today - Last min thing. WIll be ok to ride? Just not ragg it? Only about 60 miles, maybe more - I tend to get lost Then come back tonight. Dont fancy taking the train!

[Dalemac]

I would guess that if you slowly accelerate you could avoid the chain jumping the teeth, so you shouldn get the noise, however i dont know if the 120m round trip would do the chain any good......
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