Not sure what you are on about? Had plenty of stops and never any problems with officers if you genuinely have the correct IDP stamp that proves you are certified for motorcycles and in certain cases heavy bikes.
DTV, LTR, Elite or Education visa are your go to options. DTV for cultural arts or muay thai are most likely your easiest options. Depends on what criteria’s you can reach and what your plans in the country will be. Be careful with working without appropriate visas whilst in Thailand.