Rear tyre tube.

Face. · Nitrous Nuisance Joined: 27 Sep 2009 Karma :

I have fitted a new tube in the rear tyre of my GS125 as the old one had a hole I it.Finally managed to get it back together and the wheel aligned(Far as I can tell).

So went to start the shitty thing battery dead.Full charge and were good to go.So I thought....
The rear tyre felt wobbly so more air went into the tube.
Made things a little better.

Upon further inspection the tyre has seated perfect but the tube inside seems to be warping the tyre so it's not perfectly round.If that makes any sense.

The tyre is 3.00-18 and the tube is 300/325 18.

Have I bought the wrong tube or is there a simple fix?I know with tubeless tyres you need to inflate them till they pop and are seated correctly, would inflating the tube help as to straighten it out?
Arsehole bike.

Many thanks,
Face.
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GP100(Sold), GS125, CB250RS, GS500E, KTM125SX, XJ600S.

Face. · Nitrous Nuisance Joined: 27 Sep 2009 Karma :

Bump.
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GP100(Sold), GS125, CB250RS, GS500E, KTM125SX, XJ600S.

Teflon-Mike · tl;dr Joined: 01 Jun 2010 Karma :

Take the wheel off.
Let half the air out of it.
Play basket ball with it for a while, flexing teh tyre in all directions around the rim, to get it free about the wheel.
Let remaining air out.
Make sure that the valve stem is straight, flex the bead away from the rim, and work your way around the tyre looking at the bead to see if you have bent it taking the tyre off or anything.
If not, fiddle it into a comfy seat a bit more, add pressure to tyre.
Fiddle it some more at low pressure, THEN pump it up to about 70/80psi and get teh tube to 'pop' the tyre onto its seat, THGEN reduce pressure to running figure
Refit to bike.
Hopefully should be properly seated.
Else you probably got a buckled tyre bead (clumsy removal) or rim.
And patience is a virtue.... suspect if you cant wait half an hour for a reply t a question on a forum, have you been patient enough to do the job logically, and thoroughly? Old addage, do it slow, do it once, do it right, DONT have to do it again.
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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?'

Face. · Nitrous Nuisance Joined: 27 Sep 2009 Karma :

Well it was my first attempt of changing a tyre tube ever so I'm on a learning curve.What do you mean by clumsy removal of the tyre?
As for the patience thing? I don't know when I'll be able to use the internet and the fact that I'm getting desperate to ride my bike again.
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GP100(Sold), GS125, CB250RS, GS500E, KTM125SX, XJ600S.

Teflon-Mike · tl;dr Joined: 01 Jun 2010 Karma :

OK, its your first attempt.
Have you never fixed a puncture in a push-bike tyre?
Same principles & techniques, only on a tougher bit of rubber.
If you haven't done a M/C tyre before, suggest you take it to a tyre fitters. they'll probably seat it for you for a couple of quid, provided you haven't damaged the bead.
Then suggest you find old push-bike tyre and practice taking the tyre on and off until you have the technique nailed.
Clumsy removal = taking too big a 'bite' of the bead as you work round the rim levering it off, or not getting the bead broken and in the valley of the wheel before you begin, so that you stress and bend the steel cord in the bead when you lever it over the rim.
Often you wont notice you have bent or damaged the bead until you have put the tyre back on and pumped it up and cant get it to seat properly, reason being that the bit of the tyre that sits on teh wheel is no longer round.
Have you got a Haynes Manual? Have you followed the instructions. shoudl explain what I'm talking about, with pictures to show the bead and the valley between teh rims, that the bead drops into when you 'break' the bead off the seat. Hard to explain in words.
____________________
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?'

Face. · Nitrous Nuisance Joined: 27 Sep 2009 Karma :

Teflon-Mike · tl;dr Joined: 01 Jun 2010 Karma :

Face. · Nitrous Nuisance Joined: 27 Sep 2009 Karma :

Fixed today Mr. Green

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Advice appreciated Karma

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GP100(Sold), GS125, CB250RS, GS500E, KTM125SX, XJ600S.

tahrey · World Chat Champion Joined: 07 Jul 2010 Karma :

good stuff Smile

i can't be all so bothered doing my own tyre unless i really have to, the cost of getting it done "properly" on a small bike is minimal. even so they sometimes fall prey to the pitfalls teflon mentioned... i figure i'd hit at least one of them on every single attempt!

i got through a ton of tubes during a 3~4 month period last year (stupid builders leaving roof nails on the drive, just bad luck, and...) one of which got done FOC because they had "pinched" the tube within the tyre itself whilst fitting... sounds a lot like what you may have done, except you got to see what was happening close up before riding, whereas I just paid the bill, whomped it in the car boot, bolted it back on the bike and rode away ... only to be flat again within 50 miles.

easily done, apparently, though it begs the question why didn't they double check for it then? Rolling Eyes

still no harm done and it was free second time.