Quietest 50/100 cc 4-stroke scooter

[unclebob]

Greetings. I am new to the forum and have a question. I am building a project and want to know, in you guys' opinion, what is the quietest scooter out there in the 50 to 100 cc range. My 4-stroke engine is 87cc and it will run at a constant 3600 rpm, which from my research would be about 1/2 throttle on a 100 cc scooter. Make/model would be really helpful. Thanks in advance for your input!