My 2008 cr165 started to make a funny noise in bottom end at end of last race. Took it it out again for ride today and it sounded worse. Took ignition cover off and can feel free play a little up and down and side to side so it needs to be split before more damage is done. The bike has way over 200 hours and most was mx riding so I am not upset about it, bike has been good. Is there anything to look for while its split. It is to bad that it could not have lasted another 2 hours so I could have finished off road race series with it since it was setup great for off road. I own a stock 2013 wr 125 that I will use for last race a change over to 165 this winter . My plan is to sell 2008 and changed it back to 125 unless somebody wants to buy it as 165 set up for woods. I have never split a motor but have a young freind who has split yz 125 motors many times. Is there any specail tools needed. Thanks for any help.