2005 wr450 piston loose ?
Posted November 08, 2015 - 10:44 AM
Posted November 08, 2015 - 04:38 PM
Why don't you measure it yourself?
Veneer calipers from Harbor Frieght are about $21
Posted November 08, 2015 - 09:15 PM
Posted November 09, 2015 - 09:02 AM
You cannot. The difference between in and out of spec is less than the calipers can accurately measure, even if you account for the round shape of the bore (which will skew your reading since the calipers have flats).
Take the new piston to a machine shop and have them mic it. But if it's new, and the shop measured your bore in spec, I would run it. if you stick a piston in without rings, you'll see a bunch of rock. Totally normal, the rings help stabilize. There is really just a small pad on the skirts that actually measures out to spec, the rest is relieved several thou.
What makes you say the new rings are out of spec?
Edited by bikedude987, November 09, 2015 - 09:03 AM.
Posted November 09, 2015 - 09:22 AM
Posted November 10, 2015 - 05:50 AM
I would find another set of rings. I would like to see more like .015 and .018 respectively for new rings on a 3.74" bore. But like you said, they are in tolerance.