Piston mods??

[buffmaster]

Ok, I just got my cylinder and piston back from U.S. Chrome and I was reading the little pamphlet from Wiseco and I saw that it says something about drilling oil lubrication holes in it if your cylinder has an exhuast bridge. What's an exhuast bridge and do I need to drill out the holes? This is the '98 KX250 w/the 2mm over kit from Eric.

 

[kickstartkx]

An exhuast bridge if the part of the cylinder between the two exhuast ports, I think you need to drill the holes in the piston for extra oil because that is a common spot for it to seeze, and i think it has something to do with the heat

 

[Pete Payne]

The kx 250 does not have a bridged exh port . no driling is required