Try running it and the compression may come up.
A lot of the 53's were sold prior to our gas ported piston mod, and I would bet this one is not mod'd. If the comp. doesn't come up after you try to run it, send it in and we'll fix it right.

YS Service
1295 Industrial Court
Gardnerville, NV 89410

Phone 775-782-4562

Thank You,
Dave Shadel