Suzuki Sprinter is really a good bike. Except the indicators and Seat comfort, overall it's a nice balanced bike. Congratulation for new bike.
For GS-150, the life of 150 is only 2-3 years. After that u have to replace it. I don't know why it is happened, but overall maintenance is very tough. You have to spend plenty of time and money on it to keep it running smooth.