Hi , what is the time table to do the engine top end rebuild and piston change on 2013-2016 Honda CRF450R !? if i trust previous owner word , then i have near 60h on my piston . and i dont see any blue smoke when i cold start or running !? and no extra noises . but i am wondering if my engine fall suddenly without any warning !? should i do it to be sure for next year !? or just wait !?