You have to ask specifically before getting it done.

You are right in that, that I have no means to go peeking insides of the petrol tank of bikes to confirm this with statistical data . Whatever I say is only based on complains and photos posted by other riders here .

To me , going out to replace a part even outside of warranty period , and then subsequently applying an additional material coating on the later batches amounts to a clear admission of a fault or defect with the initial batch of the product . Some would go as far as to call that a knee-jerk reaction. If their sales dipped owing to that , well I guess there is no way one's sales would increase because they goofed up, no ?

You are also right that here rusting is a common problem in all vehicles , particularly if exposed for prolonged periods or not well cared for . But rusting insides of petrol tanks cannot be explained away by either of these cause . Very many vehicles ply the roads daily even in coastal India with partially full petrol tanks and no rust inside it . It is not that I've not seen any rusty tank ever other than here, but seldom so much and so early on in it's life . Else I'm sure it would have been reported elsewhere on other ownership threads .... over here bikers come to get support for their bike problems ... not to support the bike makers at cost of their rides .
If surface preparation and galvanisation is not uniform , this problem can occur in some of the bikes while others in that same batch may be fine . I think it is more of a quality-control kind of problem , which happens from time to time with various parts of all manufacturers ... not a specific suzuki or GS problem . But when it does occur , there is nothing wrong in people reporting it here and us discussing it and suggesting probable solutions . Surely, there is no propaganda in that .
As I have already said , teflon is a polymer applied with high heat for bonding . It is a friction-reducing material not specifically an anti rust material . With abrasion , which is likely to occur at the mouth of the tank by repeated insertion of metal petrol-fillers , the coat would soon be lost in that area . Even in other applications such coating is not permanent .
There is certainly some kind of coating on the insides of your tank , no one can say for sure if it is teflon or something else . The general colour and appearance does certainly match up with the teflon material coating we commonly see on the underside of cooking utensils and electric cloth-irons . Anyway , the little bit of peeling around the mouth only is not likely to cause you any problem . Keep it clean by wiping with soft cloth from time to time , keep the water drain pipe clear and don't let water accumulate around the area ... this is common care for all bikes with this type of filler caps .

Originally posted by Pinaki View Post

over here bikers come to get support for their bike problems ... not to support the bike makers at cost of their rides.

I too am not supporting the GS makers here but not doing even the minimum maintenance works cannot be justified and encouraged. We have rights but we have duties too. In my case, the first servicing was the last one done at the SC but I am not facing any rusting or other problems. Servicing the bike at SC and keeping it in good condition is not the same.
Most of the SCs agree to record the free services are done if an oil filter is bought from them and the service coupon is handed over. I cannot understand why the bike owners cannot spend a few minutes to do it. Some of the SCs are accepting the paid service coupons too in this manner as they have a monthly and yearly target to achieve.
The pictures on page 1046 and 1047 of this thread is of a 19 months old Honda Unicorn. Don’t know why such complaints are not seen in that bikes ownership thread. Perhaps they may be accepting it as natural or there may be other serious issues to discuss.

Originally posted by Pinaki View Post

But when it does occur, there is nothing wrong in people reporting it here and us discussing it and suggesting probable solutions . Surely, there is no propaganda in that.

But how it occurred to a single bike mentioned in page 223 and 227 is the question. More than that, none of the tanks filled with sufficient fuel to cover at least the bottom area of it is not rusting. This too needs to be considered.

Originally posted by Pinaki View Post

As I have already said , teflon is a polymer applied with high heat for bonding . It is a friction-reducing material not specifically an anti rust material . With abrasion , which is likely to occur at the mouth of the tank by repeated insertion of metal petrol-fillers , the coat would soon be lost in that area . Even in other applications such coating is not permanent.

Suzuki has not used Teflon for antirust coating in any fuel tanks except the latest 2011 model. It is weather proof and water, humidity and petrol cannot penetrate and is very good rust preventive. To abrade, we are not inserting any metal rods in the tank or using metallic spoon or any other tools like that to clean it.
Insertion of metallic petrol filler has not yet made any scratches on the mouth of my bike’s tank as the filler, being smaller in diameter, goes easily in it. So, let us wait and see what happens. Anyhow, it is a fuel tank; nothing more precious and everlasting.

Rusting tanks form inside is too common in all vehicles of all makes , just everybody ignores and takes it as normal.Its related to metallurgy science were manufacturer have to process the metal to prevent rusting , corrosions. In GS its poor material (choice) used for tank, whereas remaining body including nuts , screws are of good quality and hardly rust.
Most people recommend tank full to prevent oxidisation , but petrol is abbrassive and tends to clean up the surfaces as it dips down and fast evaporation due to high flash point some condensations occurs due to cooling and this speeds up the rusting perticularly in coastal regions.
I usually keep tank half and make sure petrol doesn't splash near neck filler cap region while on th move , and than apply WD40 in that part .

Somebody tell me how many models have come till now? I bought in 2010 & there was an older model before that and new models have come later. Need to know this for the tank I'm getting replaced. So my 2010 model is which gen. ?

Yours, probably, is second batch and the difference is in the stickers. Ask for the latest model. Its stickers are different but it is antirust coated.

The specs of tank that is shown in your avatar-

Vehicle model - Suzuki GS150R
Color - Candy Dark Greenish Blue
Part No. - 44100F30H10CHVT (2nd gen)

Thanks for the suggestion.

What is the best gear shift to speed ratio for a week young GS150R bike?

My bike settles well (from the engine sound) in the following ratio
1st gear: 0-7 KMPH (starting at 1.5K RPM from idle to 2.5K RPM)
2nd gear: 8-15 KMPH (starts around 2K RPM to 3K RPM)
3rd gear: 16-30 KMPH (starts around 2.5K RPM to 4K RPM)
4th gear: 30-40 KMPH (starts around 3K RPM to 4K RPM)
5th gear: 41-50 KMPH (starts around 3.5K RPM to 4K RPM)
6th gear: 45-55 KMPH (starts around 4K RPM to 4.5K RPM)

Since mine is a new fellow, I have been trying to keep the RPM around 4K about 80% of the riding time. I have about 125 KM on the ODO.

Is this good? Any suggestions?

This is good for runnin period, keep under 5K , you should get good FE

During my initial break-in period of the bike i always kept RPM below 5k, no matter in any gear.Also rode 400km in a single day, which helped to settle the engine.

Bad news!

So finally after all these days, that guy in the SVC tells me that he can't be of any help because he sends Service Records to the company every month
Now he told me to visit in the evening to check out a MINOR SCRATCHED tank which I may get in a discount. I'll click its photos & post here for more suggestions.

One thing, do we get the tank cap as a spare part from the SVC ? Then maybe I can replace the tank cap & clean the tank ? Feeling so helpless right now

I argued why this SERVICE policy when no maintenance is done inside the tank then the executive told me "No sir, its not like that. We do SAND PAPER cleaning inside the tank if we see there is any rusting happening"
Now I had no answer

I am going to e-mail Suzuki one last time. I want to know the e-mail address of the concerned person you guys here think will have the authority. Is Atul Gupta (Vice President ( Sales & mktg) at Suzuki Motorcycle India Pvt. Ltd.) the correct person ? Or who else ?

Please understand the desperation & help for one last time

Originally posted by chiragwarm View Post

Now he told me to visit in the evening to check out a MINOR SCRATCHED tank which I may get in a discount. I'll click its photos & post here for more suggestions.

Possibly it is a tank replaced under insurance as those replaced under warranty is returned to the company. Whatever he gets goes to his own pocket. Yet, you can buy it if it is usable and the price is very reasonable.

Originally posted by chiragwarm View Post

One thing, do we get the tank cap as a spare part from the SVC ? Then maybe I can replace the tank cap & clean the tank ? Feeling so helpless right now.

Spare tank lid is available for Rs. 705/- and it is with separate key. A set of ignition switch, fuel tank lock and seat lock is available for another 900/- rupees. But you can replace the tank lock with that which is on your tank now.
Some private workshops are removing the dent with compressed air. I don’t know how it is done but is heard to be a perfect work.

Originally posted by chiragwarm View Post

I argued why this SERVICE policy when no maintenance is done inside the tank then the executive told me "No sir, its not like that. We do SAND PAPER cleaning inside the tank if we see there is any rusting happening"

His is a false argument as fuel tanks are not sanded to remove rust.

After the bad service experience as mentioned in my previous posts, the mileage has decreased from 55-60kmpl to 47-52kmpl. Plan to visit the castrol bike point where they have the CO monitor to get the carburetor tuned.

Which city are you from ? And how does the CO monitor work ?