This is the time of year when we are much more likely to hear the dreaded "groan" from the starter or hollow "click" at the solenoid

(unless you are lucky enough to have a kickstart

)
The following product I CAN personally recommend to releive those symptoms

I have used one now for two winters and where I live we get several degrees of frost regularly, even in summer months

These batteries,even when poorly attended to, will crank even the most reluctant engine into life, if there any suggestion of life in it

They recover from deep discharge much faster too

GEL type batteries are not only an investment towards peace of mind, they can also be installed in a variety of positions without fear of acid spillage and are maintenance free

Treat your bike to a Christmas present she/he will thank you for, for years to come

http://www.ebay.co.uk/itm/Motobatt-MBTZ10S-Upgrade-Moto...4607d9cf7c
I'm not promoting this particular supplier, just the type of battery

Oh, and they are "Quadflex" which means they can be fitted either way round