97LONOMA
+1y
any one ever put some oil in the piston ? my friends 400 piston broke some how so he took the top part out and the piston was broken so he took the piston off his old 450 out for the 400 and put some oil in it to lube the piston and put it back together and it sound better than new VERY QUIET. has any one ever done this ? is it good for the piston ?