danimal95
05-27-2008, 07:02 PM
so i decided to put the 310 kit in my 85 R this weekend,after pulling the motor splitting the cases and installing the new crank and piston assembly,all is well.after sliding the new jug over the piston and rotating the assembly i notice that the piston is .030 out of the hole measured at the oter diameter ofthe piston not the dome,i figure i can work around this by machining the head no problem.then as the piston reaches the bottom of its stroke i notice that it doesnt go far enough down and is blocking 1/3 of the intake ports and 1/4 of the exhaust port..this i cant work around any thoughts?????it seems as though the piston was made wrong,i need help asap thanks