My other mechanic who is specialist in Hondas did say the same. He was like k these Suzuki's carburetor are good for 5 to 6 years, after that they will create problems like for example missing issue. But I think this is not true.
It is true that these butterfly carburetor are more sophisticated and need more care. What I have observed that Suzuki carburetor are mostly ruined by Hathora mechanics, they treat them same as of 70's. My specialist Suzuki mechanic told me that there is no need to open carburetor unless you are getting huge missing problems. These carbs are very complicated and every mechanic cant do justice with them. For example there is tiny rubber washer under the mixture screw, it is so tiny that it can easily be lost somewhere. Without this washer, fuel mixture can never be set to an optimum level and from here the missing issue or fuel average disturbance starts occurring.
I am using sprinter for quite some time now and it never disappointed me. Yeah, there were some problems I initially faced. I had been to different mechanics but no one understand these Suzuki bikes completely.
Luckily I found one specialist in my nearby and since then it is peace for me.
No mechanic can beat him in 'fine' tuning. Be it carb setting, valves setting.
Most people complaining that bike handling is difficult in traffic jam. I was one of them. But now I am happy. I got set my clutch. I got set by accelerator cable. You can set acc cable right underneath the assembly. If you want calm ride in jam you should losen the cable. A tight cable will make you tired quickly because a tight cable provide a sudden greater quick pick (being 110cc) and it gives a jerk at your back or at your neck.
In short, these bikes are totally different. If they are fine tuned you will get a pleasure, comfortable, trouble free ride for longer times.