This is true, I asked a guy while waiting outside for the showroom to open in Chennai last year, he was waiting to get his 350 serviced.
I asked why not a 500 he said"oh no they just use fuel" and every where I went I had a crowd, remember 120,000 rupees is a hell of a lot of money in India.
People would ask not how fast it went, but always how much fuel.
We asked for 2 x500 but they did'nt have any --all going abroad.
Now that my 350 is opened up, racing filter and open exhaust I can fly up hills I had to change down to before. I reckon I have picked up that 4 HP.