Welcome to the forum StuW!
It's great to hear that you're going to get your motorcycle licence and start your biking adventures
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I've been riding motorcycles for ~ 13 years and I can honestly say they are one of the greatest passions in my life ...
They truly make me happy, and I hope that in time you'll become as passionate as we all are
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With regard to the S1000RR, at the end of the day it is entirely "your" decision, all we can give you is our opinion based on experience.
That being said, I personally do not recommend an S1000RR, or any Sportbike let alone Superbike for that matter, as your first bike.
The reason for this, is that you simply can't appreciate how extreme these bikes are and how much you need to learn about riding, beyond just passing your test.
Superbikes are extreme in every sense of the word ... and as result, I am of the opinion that they would only hinder rather then facilitate your progression as a rider.
As MacRR has mentioned, insurance will be colossal, so it is essential you look into this before you even consider a particular bike.
Next, you must appreciate that riding a bike is entirely, wholly different to driving a car (irrespective of what that car might be).
The power is like nothing you will have ever expedited before, and despite the vast array of electronic assistance these bikes have, they are by no means fall proof, and so these bikes can get you into serious trouble very quickly indeed.
When you're starting out in riding, I personally think a middleweight naked bike makes a huge amount of sense, because you'll have a thoroughly entertaining amount of power, but it will be far more forgiving and manageable then a 200 hp super bike.
The next benefit is that an upright riding position gives you total control at slow speed, when moving the bike around or slow speed manoeuvres etc which will help build your confidence, rather then being perched over a sportbike feeling intimidated.
As an example, I rode enduro bikes and then motocross for years before getting my bike licence, I started out on a basic middleweight naked road bike for a couple years before moving to a 600 class sportbike. Despite that, I personally remember it taking me something like 10 + K miles before I could honesty say I felt comfortable doing U-turns on a sportbike lol.
The final benefit is the insurance, you'll pay a fraction of the price of a S1000RR.
I think it's very important to bear this in mind because whilst you may well be able to afford it, if you just waited a few years building both your riding experience/skills and your no claims bonus you'll be able to purchase your dream super bike in the future and the money you'll have saved would go towards good quality kit, mods, experiences etc.
If I had my early biking time again, I would have told myself to stick with a naked bike for a while longer, and indeed a middleweight sportbike for longer before moving up to a super bike.
The main reason for this is the insurance cost. The second is that there's no getting away from the fact that a superbike that can do 100 mph in 1st gear can be frustrating to ride on the road, because you simply can't let it off its leash without risking your licence.
I don't mean to sound discouraging in any way, but motorcycling is something I hope you'll enjoy for the rest of your life, so there really is no rush at all to get into sportbikes ASAP
... and they get better every year too!
Whatever bike you decide on, I hope you are wholly happy with it and that you build your riding experience as progressively and as safely as possible
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Oli
P.S. Golden rules I hope will serve you well:
"Look" where you want the bike to go.
Counter-Steering is how any two wheeled vehicle turns (try it if you don't believe me, and you'll be blown away at how responsive a bike can be). Lastly, the "experiences" you have on your bike are far more important than "what" bike you ride
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