If I were you in Rs 1 lakh, I would have gone for the bike which gives me the highest power and fun to ride. As some one has said "Power grows on you" but the higher the power the greater the time for the power to grow on you
1) Karizma- Original bike was good, the new one looks horrible and its not selling much too. Old story case closed.
2) Honda Unicorn- Buy it if you are interested only in commuting. Rest its a very boring bike to ride on. If you are interested in very long distance touring and are tight on budget then you should buy this bike for its comfortable riding position and butter smooth (but boring-read no fun) engine. Engine NVH is the best in its class and two classes above. Honda Hornet again the same boring honda engine? It lacks power.
3) Suzuki Gixxer- Good bike, better than Honda Unicorn in power and looks but still not the best in terms of power. Compared to Unicorn has a slant pillion seat so lacks comfort on the pillion side.
4) RE bikes- Buy these bikes only if you were mad for them right from childhood and no other bike comes close to your heart than RE. If you are not one of them stay away from them due to poor reliability, bad quality and expensive spares. The weight itself acts as a detriment to the performance of the machine. RE buying decision has always to be the one taken from heart and it cannot be a decision taken by the brain. If you are in touring with two people and lots of luggage then you should think of buying the RE500.
Recently one of my friend changed from FI to carb due to the poor reliability of RE FI unit.
5) Yamaha FZ- Costly but good bike but nothing much to write about it as there are other bikes which are more powerful in the same price range.
Yamaha R15- Again a good bike with quality parts, but not so much powerful in its price bracket range. It costs above 1 lakh and not worth it due to lack of its power.
6) KTM- The most fun inducing bike I have ever ridden. 200 is worth its every penny. Amazing pickup, fun to ride, has an excellent chassis and braking.
Duke 390 the most amazing bike for 2 lakh Rs but above your budget.
7) Bajaj- Forget the air cooled bikes as they are now old technology. Let us talk about the NS200 and AS200. Engines shared between Duke 200 and NS, except cylinder head and FI Unit. Minimal Vibrations, slick gearshift and good brakes. Bajaj bikes still suffer from failures with respect to auxillaries like radiator, fan etc but should not be a deal breaker as those are minor problems and have been sorted over a period of time.
One thing to note here is that although KTM Duke 200 and NS/AS share the same engine but the AS/NS has been tuned for mileage and so looses on the pickup and handling is also not as agile as a KTM. Duke 200 is far more fun to ride and has mad acceleration in the mid range.
8) TVS- Forget RTR160 due to lack of power when you can buy a RTR180 or 200. RTR 180 - ABS the single biggest advantage, very reliable bike, very good acceleration, very good brakes (but loose their sheen over a period of time). Ok-Ok pillion seat. Rear disc brake is an added advantage.Very good exhaust sound but engine NVH is poor. Vibrations between 4000-5000 rpm are very irritating and engine sounds harsh after that. Amazing chassis makes it very flickable in turns and twisties. Has a bent forward seating position which causes pain in wrists if driven with pillion or on bad roads.
RTR200- I have not ridden it but in reality it seems the power is much more usable than NS200 below 60-70 kmph. It has an upright seating position as compared to its predecessor so no more wrist pains. Monoshock, brilliant chassis, very good brakes and value for money. The good thing is I think it has a balancer shaft incorporated in the engine (correct me if i am wrong) which irons out the vibrations. Carb version would be the one to choose for if you want VFM.
I also believe that one should not fall prey to marketing gimmicks of new technology used in the bike. 4valve v/s 2 valve, Carb or FI, whatever the case be I would be more bothered about what is the additional money and new technology giving me in terms of real world experience. For eg between RTR 160 FI or RTR 160 Carb, I would choose for Carb because of its better pickup and its cheap, reliable and easy to maintain.
My choice in descending order:
1) KTM 200 (But budget goes above 1 lac, but the most fun to ride bike which money can buy in its range)
2) RTR200 ( No liquid cooling so higher reliability, amazing chassis,brakes and acceleration. Upright seating position)
3) AS200 (Good bike which shares its engine with Duke 200,vibrations are minimal and performance better than RTR180 but nowhere near Duke 200)
I have dropped Honda, Yamaha and Suzuki bikes as you have a 1 lakh budget and one should try to go for the maximum power in the given budget.
Thanks