Hello, Ihave an 2001 KX-5OO, I have the sleave in my bike with a Wiesco Std. piston,V-Force reeds, stock jetting, 40:1 Blenzoil Premix, to me it runs the same as a Nicasil cylinder, it was CHEAPER that way,Just let it warm up and you wont have any problems,YOU CAN WAIT FOR IT TO WARM UP A LITTLE BIT,just try to hold on to it!!!!Have fun My friend