This post is for everyone who wants to buy the GS150.
About complaints in the forum:
Most of the complaints about bikes on this forum are generally wishes unfulfilled and over-expectations not met, often coupled with inexperience and incorrect information and some are one-off personal experiences. Very few complaints are mentioned by multiple users(some of which are not exactly faults, just the way a bike was designed and people who don't like that particular thing still bought the bike and complained).
I bought my GS150 in mid 2008 and didn't have any of the problems you mention. In my bike there was a faulty front shock tube(it had a chip) that was replaced under warranty during running in period, it was probably a quality control problem that showed itself after about 300 km.
There was speedometer cable assembly problem that others have also mentioned and even the mechanics at Suzuki service centre also acknowledged. You just need to take extra care of the assembly and the speedometer and tachometer cables.
I never had any wiring problems, and the bike was fine when I bought it. I can't comment on the paint as it is not important for me and I have never paid any attention to it, it probably still looks the same as it was.
For first time buyers:
Since it would be your first bike, i would strongly recommend that you borrow it from someone and have a few trial runs on routes that you will be riding regularly at the timings you will use it. Make sure you like the handling or at least can tolerate it in heavy traffic. Taking it for a spin on wide roads with less traffic doesn't mean anything.
Remember, the handling of GS150 is different from all other bikes in Pakistan, it is difficult to zig-zag in heavy traffic. If you have the patience and tolerance of watching a dozen or more 70 cc bikes overtake you at and between every traffic light then go for it, otherwise get a Suzuki Sprinter.
Sprinter has a shorter zero to 80 kph time than GS150 and it can zig-zag through the traffic with ease, which makes it a better in-city use bike. GS is the best long distance traveling bike in Pakistan. Make sure you buy according to your usage. If you will be using it for both in-city and long distance, then let your tolerance and patience be the deciding factor.
Misconception about Power:
One misconception is about power, GS150 has the power to take a rider and a passenger over Nathiagali hills using about the same gears that it uses to take a single rider, thats what power is. If you like to speed run the bike don't bother with GS, buy a Kawasaki GTO or Yamaha RX115 they have the high torque required, it will be much cheaper as well, maybe you will save enough to buy a Chinese 70 cc bike for daily work.