I took the needles from the pins on an '05 800 as the tacho after doing it's sweep read about 1500 revs without the engine running and the speedo read a few mph too and, if I can remember correctly, they pulled off quite easily. I put masking tape around the central part of the needle, the piece that attaches to the spindle, I then used a small pair of pliers on the masked part and eased it off.
If it is glued on normally a hairdryer, on warm, played onto the part will soften the glue allowing you to separate the parts, or there are 'debonders' available, such as Pro-Bond, for a couple of pounds, which dissolve the glue allowing you to separate the parts. If I am making a model kit and using etched brass on plastic which, normally, I will fit with superglue, if I have made an arse of it, not unusual
, I will use a debonder to split the parts.
I think as already stated in previous posts they should pull off quite readily without too much force.
Good luck