That's one of the reasons why I installed a lithium battery, no cold start issues after that! You just need to make sure that you prime the battery before starting the engine, e.g. 20 seconds with the lights on, or waiting until the engine light goes out before starting the engine.This is after 5 min leaving the ignition on the voltage with ignition off climbs back to 12.7 The initial voltage was 13.0 after starting the bike and raising the rpm to 4000 rpm the voltage is 14.7 which is a healthy output. What the 12.2 shown after 5 min is the stock battery has a very limited reserve and a low amp per hour capacity meaning on a cold day it would not take many attempts for the voltage to drop below the systems cut off which all modern bikes have since the introduction of CPUs and multi sensor engine management. This cut off voltage can be around 10.0 volts and is to protect systems from damage but you would think this is still enough to start the bike, yes on earlier bikes pre engine management bikes you could!! The only answer is subject to a fault free bike charging system is to install a larger capacity battery which many owners have done which can start the bike on a cold day as normal and for more attempts due to a greater battery reserve. This installation of cheap low capacity batteries is a problem across all manufactures and with the introduction of more LEDs lights which use less drain on the electrical system the temptation is they will install smaller batteries.