When the lights are on my speedo lights up but my tach fails too! Is it just the bulb in the tach, if so how hard is it too change. Also my key got broke off in the ignition and it was on now to start it i just use the kill switch. Someone told me i could get a replacement from polaris fo like 10 bucks is this true, and if so how hard is it to change it? tahnx for the help??