If you don't know the answer to your question you shouldn't be riding at all. It's like how long is a piece of string. The bike is dependant on your individual needs. The bike will go anywhere but if it is to small for your frame it will be uncomfortable,unstable and could cause you injury. Better to wait until you can test ride them don't worry about power worry about practicality.
If you have concerns don't do it simple. We all have choice. But up to the individual. Don't really see the issue number 1 and number 2 WTF you posting here for ???
Do the visa exempt 60 days + 30 day extension. The employer has shown their true colors it's about control. Had the same issues so l got 60 days. The employer must cancel the work permit technically when employment ceases. It's their responsibility once you do your 60 days notify them but email to cancel it they will get fined. My employer tried to make me pay 2000 bht but l stood my ground as my new employer was going to step in. But if you are not going back to teach in Thailand it's only an issue if you want another work permit. No affect on immagration different department