Anup Bhai,

Its happening on cold start as well as while running
in other words if i leave the throttle it will be between 1000 to 1500 rpm earlier but nowdays it goes below 1000 rpm that causing

today am going to sit with my favorite local genius

just curious on what made this change and the oil change is the only major thing done before it occurred
lets see what the local mechanic says

Hi Felix,
I've heard about you from Karthik (aka 'AceHunter' on xbhp). Hope you are doing well. I would like to know about the local mechanic who tuned your engine. My bike also needs tuning. I got around 48 -50 Kmpl till april. But this month Its gone down to 42-43 kmpl .. Also am waiting for my 8th free service due next week. So probably I could find some time with your mehcanic.

I'm so much intreseted in the Tri state g2g but not this month where the weekends are packed with other commitments. I also have a trip pending to Kotagiri and bangalore. So I wouln't do justice to those plans. But would have come if it was in and around chennai.

Hi local mech are not got enough experience with bike like suzuki Gs150R,FZ ,Unicorn,pulsar etc .... You can go for oil change , bulb fitting , chain adjust,all things related other than engine.........
main problem of mileage drop after some time is due to non adjustment of value settings....all bike need value adjust after certain KM run and how u rip ur engine etc...... so check ur valve clearence before tune ur bike...even if ur tuning is right ... u get less mileage due to valve loose(tappet noise)...The easiest bike to hear valve noise is hero honda , and also easy for local mech to fix a hero honda valve problem....
But there is sure some real good local mech avail,but it depends on pure luck to find one.......
@rajesh He rajesh my SC called from pondy bcos i wrote to Suzuki abt my problem
when i talking with thru phone he told me gulf 4T plus 20W 40 is not recommended by SUZUKI....... is it true... he telling me here we are using power 1, and he himself using for his personal GS150 power1 racing full synthetic..means except castrol suzuki not recommending other oils..
I will keep my Gulf 4t plus can for another 1 year till my warrenty expires...

Ps Even my mileage drop to 42 to 43 due to value setting,MY SC(pondy) coming here karaikal for special camp to look after my bike and other bikesBut thanks to Mr vinod natarajan who instruct him to do
Before it gives constant 52kmpl and 53kmpl and 49.5 if I rip 70kmph to 80kmph

@Akfara.....These people do not have unanimity in thier policies.....

the other day,2nd service for my gs.I asked servicemen about my willingness to shift to "Gulf pride 4t 20w40" in my next third service...they said they do not have objection,and i can use without any concerns......strange....

@Madhu....i too facing the same problem.....i thought the problem was fixed in my 2nd service, 1 week back......the issue resurface from the second day itself...the engine is losing the 1000rpm idle stand and engine is off every now and than when i start........i have to raise throttle to keep idle......

Let me if you have got it fixed.....

@Anupdas.....Congrats......monsoon has hit GODS OWN COUNTRY......enjoy the rainy days ahead with cautious driving......

Any updates about the Teflon coating three years warranty........neighbor.......

@Akfara

By "value" you meant " Valve" rite. This is a new information, mileage dropping because of valve problem. Do your mechanic said what exactly is going wrong? I was told that when the engine becomes free after couple of oil changes one need to change the carburetor tuning and it will give optimum mileage.

I was also planning to change to semi synthetic Gulf 4T 20w40. As Madhu bhai said its better to change oil without their knowing, there is noway they can find it out. Again what is their reason for not using other oils . I think they are just making it mandatory so that we may not use any oil of another grade. All those who have used Castrol have mentioned that the oil totally loses its viscosity after crossing 1000 kms.

idle low engine goes off issue resolved

Oops, the culprit is not the oil, per the local mechanic I came to know the following fact I don't know how much true it is...!Local mechanic just tuned the idle screw issue is fixed. And the surprise is now changing gears are butter smooth at 3500 rpm ( earlier it was 4000 rpm) now the idle is set to 1400 rpmIn simple words he said bike is settling down your bike engine is settling in a smoother way slowly as you are not travelling far distance it took time or else you might faced this huddles at the early stage itself setting such as idle and other carb settings need to be changed accordingly this issue impacts mileage too mileage tooThis is applicable for all bikes despite its new or old.During initial few 1000 kms need to fine tune frequently and that is based on how the bike was handled, but later on it should be checked periodically. In his local mechanical proverb "carb is like a ring master and the engine is a lion if the lion is hungry it won't listen to its master thus the show will get spoiled". What I understood from his proverb. Like a kid your bike is getting matured slowly so tuning has to be done according to engines requirement. If engine is hungry and carb is feeding insufficient or inappropriate mixture of air will fuel will spoil your driving pleasure/bike.

Good to know the issue is solved. This one is very similar to the one mentioned by my service engineer. So he increased the idling rpm and did carburetor tuning rite. Let us know the economy

Great sense of humour.........

sorry anup its typing mistake. thanks for pointing out.....its not valve problem, just valve adjust...if u see the manual valve clearance should be checked every service...Ok the last two bike i had is four stoke CBZ 2000 -2003 then pulsar DTSI 150 2003-2009
The CBZ gives me 48kmpl till i gave to local mech(no service center here for hero honda that time) he played with valve setting , and my mileage drop to 32 to 35. I sold it ....Regarding pulsar i got valve sound around 5000km(after 1 year) and mileage drop to frm 53 to 44...I went to SC here ,he trained frm bajaj He did and my bike return to 53 ....then around 15000km again valve sound occur mileage drop to 45...Went to SC problem solved(interesting thing is my current GSR SC mech is working there that time for pulsar)...Then till my bike sold no problem with engine valve but i had silencer corrustion due to it mileage drop little 53 to 50...(there is hole in silencer it is solved by welding) again bike back to 53 54 .....
the mileage i quote is consistent moreover i never drive rash...
SO i write my experience here ...but people have to tell whether I am right or not.
Previously All I had is 2 stroke bike valve problem will not come mostly(valve sound will not come in 2 stroke) But i am not sure...whether anyone had experienced in 2 stroke with valve problem
but for GSR both valve and fine tunning(if need) requiered for optimum mileage
check my album to see my pulsar , i miss my pulsar which i sold due to back pain and vibration..
Sorry for long post guys.....
CASTROL and suzuki had agreement so other oil is not recommended by suzuki due to this...but all depend on showroom

did he adjust carburator tuning? along with idle screw adjust

mikuni to padmini

what is the reason behind for suzuki to change from mikuni to padmini carburator?

By experience you know about these problems with valve. Its a very informative for all of us here. The two strokes don't have valves, they have ports. A very simple set up in which inlet port and outlet port is uncovered by the up and down motion of the piston. Four strokes have a different mechanism,they use timing chain and gears to open and close the valves.

But I didn't understand about the clearance of valves, may be due to the wearing of gears. Since you know that mechanic very well, every now and then ask the mechanic about the problems that others face. It will be a great help.

It looked exactly like Mikuni. May be its a cheaper Indian version ?

Thanks u more informative than me ,yes true i use to see in paper ads comparing TVS suzuki V/s Hero honda
less running parts v/s more running parts ..... hero honda sue TVS for this ad
And i remember for performance local mech do Porting (cutting,polishing and modify) for 2 stroke which can't done for 4 stroke
About Padmini what i think is , there is some problem (hidden) in using mikuni
examples are fuel choking,idle speed varying etc...they replaced some of GS150 carburator(mathew) to check whether the problem reoccur or not
Only suzuki engg have answers

No milage tuning was done as I am still getting 53 or 54 kmpl just the idle screw was adjustedAkfara sir: am using the castrol power 1 oil its semi synthetic have done close to 700 kms with it now the color of oil is bit dark brown (new one is transparent) which means when I reach 1000 it will be damn black and might not serve good after that rite. per our manual suzuki didn't recoment any brand they just want us to stick to their acceptable quantity################Posting from blackberry so please pardon spelling and sentence space mistakes

@ Madhu Bhai

So that problem you mentioned could have corrected by yourself.

@ Akfara

The two stroke engine is simple, there are few moving parts compared to four stroke. The main drawback was that it didnt have a dedicated lubrication system like four stroke and also since there are no valves some of the incoming fuel air mixture escapes through output port. Since the oil is added with the fuel it tend to be deposited in the ports and that's what you mentioned by cleaning and polishing. Two stroke engine are easy to work with, from the point of mechanic.

But these four strokes are very complicated. But they are lot eco friendly than two strokes. But for a two stroke fan, four stroke is still boring to drive. My friends father still drives an RX-100, it shines better than my GS.

So that may be the reason why they changed carburetor. Let's see the mileage of 2010 GS.

Can you explain about that advertisement.

If you are interested about two strokes this link will help

did u notice my earlier posts where i mension same thing,but i did'nt check at 700km s which u did ,but at 1500km....what u told damn black...MY SC owner and Mech want to change my mind for Mobil 4T 20w 40 and told even after 3000km if u see the oil it is brown color and engine is smooth so and so.
I had gulf 4T plus 20w 40 in hand but waiting for SC(main) to arrive here for special camp for GS150R ,i contact direct suzuki so they send MY main SC head to attend my complaint