Got a bike today that I plan on giving to my son when he outgrows his XR80. I rode it today to see what it needed and it felt like it was governed down. Is that possible? It would pull until it felt like the powerband kicked in then it would just stop. I am a bit of a heavy fella at 200lbs but it still didn't feel right. I've rode a YZ80 that pulled harder and picked up the front wheel thru 3rd so I'm wondering what's going on here. Also, what type of coolant should I use and what do you guys suggest for my mix ratio? I really want this thing to scream so whatever I need to do just let me know! Thanks in advance!