Today I took 100ml test for bike and it came up to be 42kmpl The chief mechanic(who was with me) also took the test and he got ~43kmpl(He was sure of getting 50+ with his driving ). I asked him for the remedy. He took it back to service center and said I am re-tuning the air setting for my bike. I was puzzled is it true that there are any air settings in bike??? It sounded weird but being a IT guy have no idea about it.

Its called carburetor tuning ! ... To adjust the amount of fuel-air mixture that engine gets .... its of two types -> lean (more air, less fuel => low power, high mileage) and rich (less air, more fuel => high power, low mileage) !

EDIT: we have couple of threads on xBhp on this topic, I found these two
1. http://www.xbhp.com/talkies/pit-stop...rburettor.html
2. http://www.xbhp.com/talkies/universa...ce-tuning.html

Lean mixture necessarily dont mean high mileage and rich mixture high power. There is only one optimum point where we get maximum mileage and power. This optimum point is not a single point but a range(since a single point cannot operate perfect in a wide range of engine rpm). In that range we can adjust to a little leaner, assuming engine revs will be lower and richer tweaked for more high end for desirable results depending on the style of running.

hmm ... thanks for this insight .... mine was just a raw reply being another techie in biker's world

Its a pleasure bro, we all are here to share our info . Its commendable that you gave reply to an old query.

Thanks For ur support brother But still I love my GS

@Anupdas:yeah,u r right,it should have been downshifting instead of upshifting during throttle blips,I just was thinking something else while posting back then

@Gagan0123:When u enter corner in higher gear,you know that you need to accelerate while exiting it.But how can you accelerate??? If you are in higher gears,you would be losing revs when you would engage the clutch,so you need to downshift.But while exiting corner if you downshift suddenly with you bike still in lower rev range and high road speed,you will suffer a loss of momentum suddenly,since lower gear needs more torque to turn your wheels,which would result in bike going slower due to torque loss or the bike may slide off too as it would face the inertia of the lower gear......
So what is done,as we downshift,we try to keep the momentum of the bike going which it needs to have to keep its road speed constant,so we rev up the bike and downshift,as a result the lower gear finds its revs for the correct road speed and the bike does not lose momentum............then carrying forward from that momentum,you can accelerate out in the lower gear and shifting up again.
This is my sequence of blipping throttle:
Press Clutch-downshift-rev up-release clutch,now this works best for me....many others have their sequences changed,they rev up first,downshifts later.Hope this explains throttle blipping to you.

@Anupdas:
Yes,rear braking amid a corner helps changing direction.........its true,and it simply locks or slows down rear wheel,by allowing more momentum to the front wheel,which then turns in easier changing the direction likewise.A technique,which needs to be mastered........otherwise won't be of any great help.

Voluntary counter-steering is as easy as night and day.While moving right steering left and while moving left steering right.....what a mad concept
At slow speeds it would seem unreal,but at higher speeds,if we counter steer,the bike tilts more in the direction of the corner.
For example,if I am gonna take a left corner,I do enter the corner steering left,but then I realize that I can narrow-in more instead of going wide over the corner,then need is to tilt more,which is done by slowly steering right as the bike is using momentum to go left,the bike narrows in towards the center of the corner,enabling a faster and less wider line.What happens is,as the rider tries to steer away from the direction(action),the inertial reaction of the momentum tries to keep the bike in its predesignated trajectory,as a result the bike tilts more into the corner.

Now that I have typed in a lot of words..............I hope people reading this would be able to understand it

@ Mach

What you said about blipping is absolutely correct. An engine produces maximum power at a range, the art of gear shifting is to maintain the engine revs within that range. By blipping the throttle we are actually matching the revs of engine and transmission and also we are making the engine closer to its power band. Its useless for us, since we most of us rides between 4-5K rpm, but i think the power band of our GS is between 5k-8K. But even so blipping can give smooth gear shifts, smooth power delivery and make engine stress free.

About the braking i meant front+rear brake and not just rear, while riding in mud and gravel we can brake rear and steer with the angle created by slide.

If you are regular MotoGP viewer who can forget the way Julian Simon corner by sliding rear all the way.

Got it buddy, after two days of practicing and experimenting turning in market roads, I've got it now, here's the speed and gear required list I've made for turning efficiently:
if speed is
0-15: 1st Gear
15-40: 2nd Gear
40-70: 3rd Gear
>70: 4th Gear
Didn't went above that in the city streets
Though on clean banked turns(like on the NH79 which I use daily for going to college) you don't even need to shift gear if you are riding even at the speed of 110.......
Thanks again for explaining blipping Mach......

Yepi

Hey Gagan (Out of Order ) & Raptor Mach, you read my mind...

Hi hi , the way you mentioned seemed like you are a speed freak.....

Im very happy to see at least one mallu except me. Blitz, Spacetech, AnoopGeorge, Whiteryder you guys listening..... Lets meet up some day when you procure vallyettan (big bro) of your Hippo.

shifting gears

Hi Guys,

I noticed a small pbm for a couple of times.. When I am in 4th gear or 5th gear and above 60 kms speed... I find it very hard to go to next gear..when I press the clutch to shift the gear.. the bike kind of jerks forward..i don't hae any pbm with shifting the gear less than 4.5 Rpm. Is this common..or should i be in top gear before I start speeding up in order avoid this??

When did you change you engine oil? Gear stucking usually happen when engine gets hot or when the oil is about expiry. I have noticed that changing from 5th to 6th takes a little more effort than changing from 2->3->4->5,its more like shifting from 1->2 . R Shifting from 2 to 5 are very smooth.

Are you using toe or heel to up shift ? When my bike was new I was using heel shifter but now I use only toe shifter. I hope you close throttle while shifting and open throttle only after releasing clutch. When the engine rpm increases we need to shift quick, pulling clutch, closing throttle, shifting, releasing clutch, opening throttle all these must be done quickly if you are doing following this, there wont be any jerk.

If this don't help, try changing engine oil.

Engine oil was changed Very recently.. I don't have any problem with changing gears in lesser speed.. Only when i am in higher speeds, i feel it is difficult..

I have never felt any problems with changing gears in other vehicles at higher speeds. Maybe i am very exited with my new bike, i may have forgot to close throttle (at higher speeds)..Let me try to check it correctly and get back to you..

Sure, closing of throttle in the sense just go easy on throttle, else you will lose momentum. Also check the clutch has adequate play. BTW whats you ODO reading?