I have City Vario 2006. I have a small problem the whenever I start my car, the rpm drops alittle bit to 500 to 600 then settles for ~800 within a sec. I asked from Honda ppl, if its ok? They said nothing to worry about. My car's plugs are above 50,000 KMs driven (NGK). Car's pickup has also dropped a little bit as well as its fuel economy (decrease of around 2 kmpl). Should I go for plugs change? I understand that those plugs are capable of 20,000 KMs but somebody advised me if u dont drive your car aggressively and always on petrol (which is in my case), your plugs will last much longer than 20,000 KMs. Should I go for throttle body servuce as well? Somehow or the other I feel reluctant to get it serviced because when last time I got it done from Honda 3s (30,000 KMs before). There was no/negligible difference in my car. Please advise senior members