Tachometer is inaccurate

I recently changed out the backlight leds on my 2011 CBR250R (ABS). I had to pull apart the whole dash unit to get in there. This includes taking off the tachometer needle. The leds work great now but the needle is in the wrong position. For example, when I'm idling at a stop the tachometer reads 0. Also when I'm close to redline the needle is off by a few thousand rpms. Has anyone had this issue before and have an idea on how to align it properly?
Thanks in advance.