new piston

[jonooffler]

Hi the time has come to pull the jug off my 2003 KDX220 and replace this piston its done 2400 miles and I don't know if the piston is stock or not.
Just wanted to ask what you guy thought about bore do you think its safe to put in a new piston (Wiesco) or do you advise scotch brighting the bore to give better oil cover.
Any other help would be great.
Jono
2003 KDX220

 

[julien_d]

The scotch brite trick is just to break the old oil glaze of the cylinder to help the new rings seat properly. Deglazing the cylinder is a necessary step in installing new piston/rings. How you go about deglazing is up to you. Muriatic acid works well if you're brave, scotch brite or SOS pad works fine too with a little more elbow grease.