Wiseco Piston for 99 CR250

otto · #1 03-23-2007, 11:20 PM

Hey guys, I am in the process of installing a new Wiseco piston in my 1999 CR250 and the directions say that if my cylinder has an exhaust bridge I "should" have 2 lubrication holes drilled into the skirt of the piston. Do I need to do this on this bike and if so how hard is it to drill the holes correctly and what is the best way to drill them? I have rebuilt some top end in the past but it has been several years and I never drilled lubrication holes.

Faded · #2 03-23-2007, 11:26 PM

Your bike doesn't have an exhaust bridge so don't worry about drilling the holes.

otto · #3 03-23-2007, 11:55 PM

Thanks dude, I didn't think so but thought I better check. Appreciate it.

ossagp1 · #4 03-24-2007, 12:45 AM

You are in luck, I have bridges for sale. They come with instructions on how to drill your piston.

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