Hey Nic,

Yea it has a little bit, it's got a little warmer the last couple of days up here in sunny Lancashire.

Only by a few degree's though.

Now i don't know whether to leave it in the bike and hope it still works in the morning, or to un-box this new battery and charge it just in case the old one decides not to work again tomorrow!?

Im guessing you have to fill it yourself and charge it...no chance of taking it back then..assuming they will refund you that is.

Hmmm...personally id charge it and use it. At least then 'if' it does it again you'll know it's not the battery.

I forgot to ask how old is the original battery?

Hope you didnt pay too much. What make did you get?

Good call. I have had two battery’s go down over the last 2 months. One on the xt660 and the other on my fz1 and that was a newish lithium battery. The temp dropped to 0 here for a week or so and it killed the battery’s. And as we all know it’s common for the cold to kill a battery. Ps I bought a motobat they yellow one. Did not last 6 months they have gone right down hill. Called the shop up they just refunded me did not even want it back? It was like they expected it they were not surprised at all. Everything is just being made cheaper and cheaper and they just don’t last like they used to. Ps use the new battery 100% as if it was the cold it is more than likely on its way out anyway

I got a Yuasa one from my local Yamaha dealers.
My battery is at least 3 years old as I haven't changed it since getting the bike, not sure how long it was in before I got it.
I charged the new battery overnight, took it down with me just in case, but the old battery started the bike straight away, same as yesterday.
So bloody weird!
Anyway I'm at work and got to ride my bike this morning so I'm happy (for now)
I expect the next cold stint will kill the battery again so I'll keep the new one nearby ready for the time..
Thanks for your help chaps, really gonna miss this forum when it closes, some solid dudes here!

Fingers crossed mate

If your going to keep on using the old one till it fails again lets hope it dont leave you stranded somewhere.

Carry the new one in a rucksack with the correct socket for when it does. I'm 99% sure your batteries foobarred.

I would just fit the new one anyway, you have bought it so just fit it

Well I tried fitting it but it was the wrong size (doh)
I know which I need now for sure though so i'll take it back to the shop and exchange it.
The bike's been running OK
Just once last week I took it to work and when I tried to start it to come home, it was hesitant but still managed to get me home.
The I tried starting it after I was home and it wasn't having it.
So I charged the battery overnight and it was fine in the morning (it's been nasty weather since so i haven't taken it out but I try starting it every morning and it's fine)

Still a strange one this...

The battery you bought from a Yamaha dealer was the wrong size?....

Is it not a YT9B-BS??

Just a thought...when it wont start,or struggles can you hear the starter solenoid clicking away?.have you tried shorting it out ? ie putting an insulated screwdriver across both terminals...old skool init!

Yea he managed to give me the wrong one (was the only one in his book that was for my bike apparently...)
He gave me the LYTX9BS and it's a little too wide.
I'm hoping as he was the one who told me which one to buy, that he will give me a refund towards the new one even though I've filled it with acid now..

It's the YT9B4 I'm after now, they have it in stock for �49

As for the Starter solenoid, I hear that sometimes, like this morning, the 1st time i tried the old battery it turned over but wouldn't start, so i tried it again and i could only hear the solenoid BRRRappping away.
So does that mean the starter solenoid is ok?

I'll get back to you's after i try the new/right size battery in the morning.