Prince, you seriously need to relax.
You mention consumercomplaints.in? Go through that website & you'll realize that any company operating in India has complaints against it on that website. Samsung, LG, Motorola, Intel, Bajaj, TVS, Maruti, Ford, every company you can think of.
You know there are people who aren't used to authority. The problem is that even if power is given, people don't know how to use it. They don't know how to wield authority. Fools are fooled everywhere & smart people are recognized within seconds.
The first complain you mention...the one selling the test-ride model. That customer is the one stupid, okay. He catches the dealer red handed & still takes the bike's delivery after the dealer promises a compensation with the service? What the $hit, fu*k is that? He visits the service centre & it takes him hours to get his issues attended? I bet the word fool is written on his face.
I'm a Bajaj hater. Fine? A road side mechanic can service a Chetak. What specialized component does a Chetak has??? Nothing. Look Chetak is a good scooter. Its Bajaj bikes that can't handle stress for a prolonged time & that is the reason I don't like Bajaj. Bajaj service is fine.
Understand this that Yamaha India's position was precarious. The company was such a poor performer in terms on annual sales, some recommended Yamaha should close shop. Libero, Crux, Gladiator, then remodels, then face lifts...the company was going nowhere. No customers, bikes with starting troubles, mileage issues, quality issues....& its competitors setting sales records every month.
That is the reason Yamaha got so frustrated it finally decided to design a bike specially for India in line with the global R series. It decided it in a time when India still isn't ready for 150cc bikes that cost almost equal to the TATA Nano. Yamaha set an annual sales target of 3000. R15 sales crossed the 3000 mark within a quarter year.
Understand this that Yamaha lost its entire fan following after it ceased producing its 2 stroke models, the RX100, RX135 & the RXZ. There are enthusiasts who still have the RX series & still love them. Even I love them. But no one would purchase the new 4 stroke Yamaha's with Bajaj Caliber & Hero Honda Splendor. And why should they? Hero Honda & Bajaj offered better models than Yamaha.
Now tell me Prince, there is a company called Yamaha which has global presence. But it has very very poor market in India. It has a nationwide dealership chain...but many dealers left Yamaha during its lean period (& they were right to do so). A dealer's earnings are from the bikes it sells. Each bike fetches the dealer a fair amount. With almost no sales, the dealerships were running as a loss or at the break-even point. With no healthy source of revenue, how do you expect them to keep their service up to the mark? Ask this question to yourself and you'll know in your heart (to be precise, the brain) that it isn't possible. Except for big town dealers selling the R6 & other higher class bikes, the other small town dealers had a real hard time.
Its only with the arrival of the R15, the FZ series & the Fazer that Yamaha dealerships are good now.
I answered in one of your previous questions that service for the R15 is good. I repeat service for the R15 is good. The mechanics are specially trained at Yamaha's factories in select cities for R15 service. Just like TVS trained its mechanics specially for the RTR series & just like every dealer trains its mechanics at the company factory for a newly launched, differently designed model.
As for the service, cheats, frauds are everywhere. A dealer will understand with the language you speak whether you are smart of not and whether you can, if required take appropriate action in case of a trouble. Tyre problem isn't Yamaha's fault. Selling old bike is a dealers fault & that fool should never have taken the bikes delivery. Other problems are minor & the respective people should simply have met the company representative at the dealership/service. It would have been enough to solve their problems. Rest assured that Yamaha India cares for its goodwill. It even supports its customers for mods. Yamaha India will listen...& if you keep your eyes & ears open, you'll never have a problem that's persistent.
The other R15 problem...one related to the fuel pump...that too is the customers fault. He obviously is getting the bike refilled with adulterated petrol.
If you aren't satisfied just because of a complaint website, without any personal experience, you can always go ahead & purchase the P220 which you like so much. Then there's the Apache RTR180 too.
P.S.
The last line of your question "plz expain YAMAHA" is childish. Yamaha doesn't have people to scan online forums or Yahoo Answers. Yamaha won't answer your question here. There is an official way to clarify your doubts.