Yes, it is comfortable as the seat height of Bajaj Avenger Street 160 is 730mm. One can easily cruise at 80kmph and if need be, 90kmph too. For further details, you can refer to the article by clicking on the below link: https://www.zigwheels.com/reviews-advice/reviews/2019-bajaj-avenger-160-road-test-review/33850/
The kerb weight of Bajaj Avenger Street 160 is 150 kg which is lighter considering other models of Avenger series. Avenger Cruise 220 and Avenger Street 220 has a kerb weight of 159 kg and 155 kg, respectively.