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**vishnukmd** · 06-12-2011, 11:00 PM

Originally posted by lead View Post

hey guys my gs150r's engine is making some noise after it reach 6k rpm or above like some rubbles are in the engine is it coz of the tapid or something else is wrong?

It is due to many reasons. If you try to reduce this sound, the bike will shiver while you ride.

Originally posted by MSN1 View Post

Let us know the following

How many kms old your bike is ?

How many services are done ?

When you serviced last ?

Are you in run in period ?

When the oil was changed last ?

Just with the sound we can't conclude it as a tappet issue, some one need to drive and decide on what's it if its really annoying please visit your SVC asap

Madhu, a survey? Why is the mileage not included in it as vulcan tried?
1. Kms run – 16947.
2. 1 (one), the first, from the sc. Washing, polishing, oil / oil filter replacing, cleaning or replacing air filter, lubricating, chain tightening etc. myself. Inflating tire at the sc. Using iridium spark plug and no frequent adjustment required.
3. 9/2/2010 at 946 kms. But all the usual maintenance works whenever needed are done. Replaces the oil at every 2000-2500 kms.
4. N. A
5. At 16000 kms on 7/4/11.

**vishnukmd** · 06-12-2011, 11:14 PM

Originally posted by Maestro View Post

just tell me how you got that.....i need an improvement in mileage....otherwise the petrol will make a biiig hole in my pocket!!!

Nothing; I think. Kept everything intact. Strictly instructed the mechanic to not open or retune the carburetor or do anything like that.

The petrol used was branded, like Power, Speed etc. and the oil was Castrol power 1 ss. Besides this, the usual periodic maintenances.

The mechanic from the authorized sc was my pillion rider and it was a test mainly for him as I was always present with him at the time of servicing and always asked him to not play with the bike.

Originally posted by gs150r View Post

Is it possible to extend the warranty of our GS? My 1 year warranty will expire this june end

**MACH50** · 06-12-2011, 11:32 PM

Originally posted by vishnukmd View Post

What I have heard is that it is impossible to increase the performance and the mileage at the same time. Your engineer friend is doing something miraculous.

Maybe

.......but the results would be evident on the GS150R.It is definitely something new......a lot of work.The results depends on a lot of maths, which,I do not understand

Oh,very few people ride like you(Vishnu) when it comes to being gentle, atleast not me.
Moreover with solid boost in performance, that mileage on the under trial Fiero is not something comparable to the stock.

@Maestro: Vishnu answered you and he is the best man to trust with mileage issues

Increase of mileage in my cases are often just a stroke of good luck or a bonus by product of my clandestine activities.

The bike has to be really good in order to provide me mileage even after the way I ride.

**vishnukmd** · 06-13-2011, 12:12 AM

Originally posted by MACH50 View Post

Maybe

.......but the results would be evident on the GS150R.It is definitely something new......a lot of work.The results depends on a lot of maths, which,I do not understand

Oh,very few people ride like you(Vishnu) when it comes to being gentle, atleast not me.
Moreover with solid boost in performance, that mileage on the under trial Fiero is not something comparable to the stock.

@Maestro: Vishnu answered you and he is the best man to trust with mileage issues

Increase of mileage in my cases are often just a stroke of good luck or a bonus by product of my clandestine activities.

The bike has to be really good in order to provide me mileage even after the way I ride.

Whatever calculations your engineer friend is doing, there is no way to increase both performance and mileage of a vehicle together. It is against the laws of physics and thus against laws of universe.

I am ready to prove with any GS in the stock settings that it easily gets a mileage of 65-70 kml, within a speed range of 60-75 kmh.

It is simple but depend your riding habits and the condition of the bike.

**Maestro** · 06-13-2011, 12:41 AM

thanks vishnu.....so you mean to say that if ridden between 60-75kmph we can expect more mileage as compared to riding in 80-90 kmph range??

but one thing i would like to say....law of aerodymanics denies that a butterfly can fly but it does so lets hope machda's friend also does the same!!!!!!

**MSN1** · 06-13-2011, 12:46 AM

Originally posted by vishnukmd View Post

Whatever calculations your engineer friend is doing, there is no way to increase both performance and mileage of a vehicle together. It is against the laws of physics and thus against laws of universe.

I am ready to prove with any GS in the stock settings that it easily gets a mileage of 65-70 kml, within a speed range of 60-75 kmh.

It is simple but depend your riding habits and the condition of the bike.

thats true,

Performance (faster pickup and speed higher than stock level) cant be reached with out sacrificing the mileage.

in other words mileage is indirectly proportional to speed

the only exception is diesel cars

LOL in most indian driving condition its not possible for some one to drive constantly in 60 to 75 kmph for 65 to 70 kms
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i asked those question to lead not survey, to find what may be the possible fault
he said noise is coming at 6 k rpm but we should not continually drive at 6 k rpm during running

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i believe the warrenty of GS is 20,000 or 2 yrs

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**MACH50** · 06-13-2011, 12:46 AM

Originally posted by vishnukmd View Post

I am ready to prove with any GS in the stock settings that it easily gets a mileage of 65-70 kml, within a speed range of 60-75 kmh.

Never questioned that friend ...........just trying out something that is not stock, mileage is merely a by-product......but would be able to explain it once I finalize whatever I am into.

@Maestro: Thanks for your gesture

Originally posted by MSN1 View Post

mileage is indirectly proportional to speed

Is there a law to prove it ???? I mean, Charles Law, Boyle's Law or Avogadro's Law something like that ????

**MSN1** · 06-13-2011, 01:11 AM

Originally posted by MACH50 View Post

Is there a law to prove it ???? I mean, Charles Law, Boyle's Law or Avogadro's Law something like that ????

Bike needs more fuel to attain and maintain higher speed in comparision to the optimal (40 to 60 kmph) speed, thus mileage and speed wont go together

i feel the below law will fit

Mileage is the mother in law to speed, she wont let her son in law to attain greater speed with higher efficiency

yeah with a divorce we can break this law

example turbo diesel engines will give almost same mileage even at higher speed.

**vishnukmd** · 06-13-2011, 02:01 AM

Originally posted by Maestro View Post

thanks vishnu.....so you mean to say that if ridden between 60-75kmph we can expect more mileage as compared to riding in 80-90 kmph range??

Originally posted by MSN1 View Post

LOL in most indian driving condition its not possible for some one to drive constantly in 60 to 75 kmph for 65 to 70 kms

i believe the warrenty of GS is 20,000 or 2 yrs

**vishnukmd** · 06-13-2011, 04:07 AM

Originally posted by MSN1 View Post

with a divorce we can break this law.

Inevitable?

**ashoka_bnglr** · 06-13-2011, 01:13 PM

[QUOTE=vishnukmd;647811]
Most of the GS owners are raising the engine rpm to 6.5 k or more to shift to the next gear. Some are shifting to 6th gear after 50-55 kmh speed. How can a better mileage be expected here?
Vishu , I change gears at around 4k and yeah i try to get to the top gear as soon as possible(and i was under the impression that this kinda driving will return a good average) but now I have to re think
So it would be helpful for beginners like us if you could share your tips and driving style you hav adopted
Someone on a KB100 was able to cover 24.9 kms with 100 ml of petrol. Does everyone get that mileage?

I am not against that engineer who tuned the Fiero of Mach. What I said is that no engine can be tuned to get 50% increase in power and 36% increase in torque. Getting an increase in mileage with this is out of question.
Second that

Originally posted by MACH50 View Post

not someone you may know.........not an Xbhpian, but an engineer and he is located in my city.

The modification promises 50% rise in Bhp from stock and 36% rise in torque from stock and as an icing on the cake,a stupendous rise in mileage too.But it comes as a package.The under trial Fiero now delivers close to 78 kmpl.

Everything else depends on what we get at the end of dyno-tuning.The Fiero has not cleared optimization yet.You can tell the tech is being refined for the GS150R.

I am also closing in on another modification fast, a full DC electrical system for my bike which would run Bixenon(both upper and dipper) megawhite(4300K) HID soon.

Mach bro,
Just by looking at the figures you quoted I was like .. If that is indeed possible it would be a miracle

But "To achieve something you hav to compromise on something else", I guess u may hav to compromise on mileage ..
But really hoping to get proven wrong in your case.
Good luck with the mods

**2strokerama** · 06-13-2011, 01:17 PM

What I said is that no engine can be tuned to get 50% increase in power and 36% increase in torque. Getting an increase in mileage with this is out of question.

I believe it can. Its a matter of using better parts\materials and\or technologies along with optimised calculations. If the engine efficiency increases because of those, so does mileage. + Mach_50, didnt mention how he drove to get that mileage....might be uncle mode.

If companies dont do the same, its probably because of the time and costs involved in doing it. + Its a business after all and ultimately they want more profit at lesser investment. + A higher end product might not get them the same sales volumes as a lower end, more accessible product. Though this is not a very apt example, still, you can see more Karizma Rs than ZMRs on the streets.

But I think, either mach_50 is ready to shell out big bucks on his upgrades or he's exaggerating a bit on the power and torque figures. Lets wait and see.

@Mach: Good luck man...thumbs up!

**Maestro** · 06-14-2011, 01:35 PM

Originally posted by MSN1 View Post

Bike needs more fuel to attain and maintain higher speed in comparision to the optimal (40 to 60 kmph) speed, thus mileage and speed wont go together

i feel the below law will fit

Mileage is the mother in law to speed, she wont let her son in law to attain greater speed with higher efficiency

yeah with a divorce we can break this law

example turbo diesel engines will give almost same mileage even at higher speed.

so what should be the optimal cruising speed on highway in order to get maximum mileage!!!

**2strokerama** · 06-14-2011, 02:50 PM

^^^^ I guess its probably at the point of max torque....around 6000 rpm i.e. ~ 80 kmph.

**Maestro** · 06-14-2011, 04:03 PM

so that means with gear shift @4500 rpm and with continous riding @6000rpm in 6th gear one can expect the optimum mileage

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