Q. I am 100 KG weight and 172 CM height, is KTM 390 Duke comfortable for me or not?

It will be little bit tight. better go for meteuor 350 if you do long ride. else go for daminor. i am 180 80 kgs i still ride my duke 390 2013 model. it gives me backahe if i travel beyond 500 km. if you hardcore ktm fan and long distance rider duke will fit you. i city ride if ride beyond 40 km use shoes as it gives heat.

It will be comfortable for you, its not as comfortable as dominor for any people but still it's comfortable for long rides (max 500kms) and can use Air seats for more duration riding.

Although the posture is bit agressive but that should hardly matter for short or normal casual rides..