Are you kidding. CB CH 40 is 27.405 MHz. There is no such thing as VHF or UHF Channels. Boafeng memory 40 maybe something they did. This is a Chinese radio. There are no channels on Amateur 2meter or 70cm bands. Boafeng and Wouxun are being reviewed by the FCC. Radios that were submitted for FCC for approval are not in the format of what has been coming into the country. They maybe fined or banded from importing into the USA. For example the Wouxun 950 operates at 9.5 watts in cb band and actually 1 Khz off. There are higher power radios but are imports brought into the country illegally. The FCC has been reviewing but not been cracking down but it is just a matter of time. CB max 5watts into finals typical 4 watts rms out. Your Boafeng is not approved for use in the CB Band. Your Yaesu complies with FCC regulations and will not operate out of band. Yaesu will not invite the FCC to come down on them. They have been selling amateur radios probably longer that you have been alive. 70cm band in USA 420-450mhz modulation must be in band limits. Your Boafeng has been modified to operate in the EU Band.
The USA 70cm amateur band is 420-450mhz in the USA. Transmitting at 477.400 is in the public safety band. Interference in the public safety band is inviting jail time!!!!. This is no joke. FCC will crack down ASAP. Illegal operation in the CB band is pretty much ignored most of the time. They go around every five years or so and make an example of a few people. They rotate to different areas. There is a different group that responds immediately to interference in public safety band (Police,fire,ambulance,hospitals,rescue, etc) . God help you because the Federal Judge will hammer you.
Illegal operation and interference in the amateur radio bands is self policed by the amateur radio operators associations. You would know this if you were licensed. Amateurs report malicious mischief to their local FCC volunteer coordinator who reviews it. They maintain directional equipment in their mobile vehicles , they id and build a case against the offender. They practice these skills with fox hunting contests. They rarely approach the illegal operator this according to FCC rules. The evidence is turned over to the FCC. The FCC no longer polices the bands like they used too giving out minor fines and warning. Now the fines are very heavy. The last fine I know of recently was for $2500 for not Iding every ten minutes. Ouch - check it out for yourself. You'll never know what hit you.
Many States and counties in the USA have laws against having scanners and transceivers in cars. Federal Law supersedes the reserve laws of the state and county. Licensed amateurs have been ruled to be allowed to have these radios in the car. Never the less they have been arrested and fined and had to go to federal court to seek relief. Fines for not using hands free operation stick. If you are pulled over you have no license and no recourse. Amateur operators like myself welcome you to the hobby and want you as a member of the community and will help you get your ticket anyway they can. Protect yourself and your future privileges get your ticket ASAP.