Apex domains cannot have CNAME records.
Question and response
Question
dig muttonpowersports.com. NS
Answer
muttonpowersports.com. 5 NS ns-1549.awsdns-01.co.uk.
muttonpowersports.com. 5 NS ns-793.awsdns-35.net.
muttonpowersports.com. 5 NS ns-590.awsdns-09.net.
muttonpowersports.com. 5 NS ns-822.awsdns-38.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0