I make a mistake, I think I needed to include rest of FT817ND US class, as I'm not inheriting it. See attached patch.

-Vinny

On Wed, Dec 12, 2018 at 4:52 PM Vinny Stipo <v@xpctech.com> wrote:
# HG changeset patch
# User Vinny Stipo <v@xpctech.com>
# Date 1544661860 28800
#      Wed Dec 12 16:44:20 2018 -0800
# Node ID df70e2455c4877c9d58f440690e6161da16c880e
# Parent  62b4cbefa86738c37317a133f903500f669baf23
FT-818ND US Model - I think this patch may work, I can't test. Bug# 6289

diff --git a/chirp/drivers/ft818.py b/chirp/drivers/ft818.py
--- a/chirp/drivers/ft818.py
+++ b/chirp/drivers/ft818.py
@@ -250,3 +250,16 @@

     SPECIAL_MEMORIES_REV = dict(zip(SPECIAL_MEMORIES.values(),
                                     SPECIAL_MEMORIES.keys()))
+
+@directory.register
+class FT818NDUSRadio(FT818Radio):
+
+    """Yaesu FT-818ND (US version)"""
+    MODEL = "FT-818ND (US)"
+
+    _model = ""
+    _US_model = True
+    _memsize = 6703
+
+    _block_lengths = [2, 40, 208, 208, 208, 208, 198, 53, 130, 118, 130, 130]
+