Hello vinuchel, I've been using a 2017 Bajaj Dominar for an office commute that was between 30-40 kms with half of it being in Mumbai traffic. I was going for a Pulsar 180 but made a switch to the Dominar 400.
I'm 5'5 with a relatively shorter inseam and lean as well, so not the perfect guy to use this heavy bike and somehow, I've managed to gel well with it.
My suggestions as per my own experiences would be to:
- Get a good pair of hand gloves: Gel handlebar grips are fine but what really would make a difference is the hand gloves. And not the cheaper ones. You should check for the grip, if you experience a pain in the webbing between your fingers and they should fit you perfectly.
Case in point: I was moving at 90km/hr and I was shedding speed to try and negotiate a turn but couldn't do it in time hence I crashed into the divider, got thrown to the other side of the 3 lane highway and my palms escaped without any scratch. Gloves with good padding will not only give you a good cushion but will also help protect your palms.
- Get a Fego float (or an alternative): I got one and instantly realized it wasn't for me as I'm not that tall to tip toe on my bike. Fego float alternative I have increases the size by 1 inch and I loved riding on it, but come traffic and I couldn't manage the bike confidently. Make sure you're able to comfortably maintain your relaxing posture once you are at a halt. Mine is slightly stretching to the right and keeping the right foot straight and flat footed to the ground while my left foot rests on the gear shift thereby locking the bike between my legs properly. Increasing the seat height should not take away your ability to be able to balance your bike properly when standing still.
Case in point: If you have gotten used to a factory tuned suspension setup on curves and general riding, tweaking it might take some getting used to. Or you might have to tweak it trying to find the perfect setup for you. If you are on a long trip, and have luggage mounted at the back, you might not find the setup to your liking as there will be a difference between the suspension tune with and without the luggage. Hence you can opt for a inflatable seat like a fego float.
Get fog lamps: But get the mounting right. I saw you mentioned narrow single lane roads/highways. I had mounted fog lamps I bought from Amazon on the leg guard. They served my purpose well because the fog lamps pointed straight while the headlamps on the bike could change direction. I had also slightly bent the right fog lamp
towards the ground to increase the length wise spread of the beams. Unfortunately, during the lockdown my fog lamps got stolen from the parking (I hope they are using them properly at least) hence I don't have them anymore. Oh, you might ask why fog lamps for back ache? I've found myself leaning slightly forward while riding during the night commute to better see things and judge the road. That extra pair of light beams light up the road properly and made me give up that habit and maintain a decent posture.
Get a tank bag: A tank bag is my best friend. It has improved my commute experience and long ride experience as well. In commutes, I am able to just put my weight on the bag when I'm in traffic thereby releasing any pressure from my legs and wrists. On long rides, I let go my left hand on straight highways and rest it on my tank bag and opt for a very relaxed stance that can be changed very quickly if there is a dog or pedestrian crossing the highway. Mine isn't a magnetic one, stays permanently on the tank and I also use a combination lock just in case.
Stay hydrated: Long rides are good and all, and I've also found myself a hydration pack on Amazon that makes it easier for me to sip water while I'm riding. I arrive fresh to my office or home, the capacity is 3 liters and I generally end up drinking a liter and a half on the commute. Still a good way to take care of myself.
Get bungee cords: If your work bag is heavy, don't mount it on your back. Use bungee cords and securely mount it on your rear seat. I was not born with a backpack on my back and I ride the same way

You can also (sort of) lean on it while on a signal or on long stretches of road and use it as your back support.
Learn to shed speed properly: Now by no means I'm judging your riding style but here are a couple of pointers to keep in mind while shedding speed.
1: I've always gripped the tank with my legs to reduce pressure on my wrists when I'm braking. That way, when the bike is slowing down, the upper half of my body is not being pushed forward and end up causing any stress on my fore arms and wrists.
2: Try and anticipate the situation around you. This is especially easier on commutes as you can have a mind map of the potholes, crowded areas around you and can basically avoid last minute braking and possible stress to the wrist and back.
3: Use your rear brakes as much as you use the front ones. I generally start to slow down using my rear brakes first and then gently engaging the front ones. Since both my legs are working to adjust the gear and engage the rear brake, it kinda becomes a mental exercise to grab the tank with the legs but I do end up finding the sweet spot which then provides me with ample time to judge and engage the front brakes. My bike comes with rear ABS hence I'm able to use it effectively without the risk of losing the rear grip, you should do the same or follow the 70:30 braking where 30% (and initial engagement) is the rear brake and 70% effort is from the front ones.
Get a good windshield: Looks are subjective and you might have people coming at you saying "why did you buy a naked street bike if you wanted to put a large windshield on it?". I laugh these things out as a windshield helps immensely on long rides. Remember how I rest my left arm on the tank bag, I also end up taking cover behind the windshields "sphere of influence" to better manage the amount of winds hitting me.
My first bike was this Bajaj Dominar 400. I was a car guy but Mumbai traffic and the fathers MT Innova made me convert to bikes. The Dominar is heavy, has its own set of setbacks for me in terms of my weight to height and health. But it has been a constant source of happiness during and after the commute. And more importantly, I do credit that bike and its weight, its dimensions and the tech it comes with to take me out and bring me home safely.
I don't exercise much, but I do make sure that I'm properly stretched before the bike ride. If you can add exercise to your daily routine, it will help too. Of course consult your health professional for that.
I have also had no prior experience of riding bikes. Most of what I know is from youtube. And not only from Dominar owners, but
-people taking their A(1/2) license tests in the UK: learnt how to use engine braking, braking in general, being aware of surroundings.
- or people in Sweden trying to ride their heavy ADV bikes around the country: My bike is heavy by my physiques standards and hence these were a great help for managing a heavy bike.
- our own brothers and sisters negotiating the Himalayas crossing rivers, falling down, picking themselves and their bikes up (properly, without injuring their backs I will add): occasionally I might be unable to put my foot down properly for there might be a pothole right where I've managed to stop at a signal and my legs aren't that tall, if I risk falling, there was an immense learning on how to manage the fall and recover from it.
- from people who traverse the Central Asia route on large and small bikes alike: staying hydrated, taking breaks, staying safe even in the back roads (i had an incident where I had to reach out at my pepper spray bottle when I was trying to pass pedestrians who were inebriated and were threatening me with consequences when I stopped to take a deep breathe and regain composure from the thought of a possible accident)
- and from race bikers too: speed shedding, using my body as a resistance to speed, negotiating curves.