Q. Can I go on a long ride with Yamaha YZF R15 V3? Else, I should choose other higher CC bikes?

Long rides dont really need higher CC, thats the terrain you are going to, and are you going with pillion or not, first thing if you are planning to go with pillion v3 is not a good choice for long ride, else everything is fine, you can find many videos on youtube of v3 going to leh ladakh.Anyways V3 is more inclined towards tracks than long leisure rides, but it performs well, I went on 300kms with a single stop of 10 mins, and believe me you just need to adjust yourself with bike and there will be no pain at all

Yes, you can, but if you have any pillion then it might not because of Torque delivery comes late @8000 rpm

Yes always better Yamaha r15 v3