I have not tested the Mileage yet..The main thing that is improved is the acceleration.... Practically 145kmph is not possible in 6th,as we cant redline in 6th... Also there were lots of cross winds today...so you cannot come to any final conclusion yet...

The magic word is... "RELIABILITY"

If you eat a piece of bread slowly it will last a while, but instead you gulp it down it'll get over soon and there's a possibility that you'll choke to death in the process.

Though the thrill of it is priceless.

All km/h numbers are in center stand mode rite

If it is not so, it need to be proved scientifically.
The speeds I have mentioned are theoretical but are practical on road if you ride the bike at that rpm. E.g. GS reaches 33, 57, 77, 92, 105 and 120 kmh in first to sixth gears on road at 8500 rpm, where it produces its maximum power and it is not impossible to reach that speed and any kind modification is not needed to achieve it.

I cannot understand what you mean. Do you think that the FE and power/performance of a bike can be increased at the same time? If yes, how is it done? Please come to the correct point instead of beating the bush.

I have ridden my bike and am feeling the difference,so its just my opinion about acceleration..You need not worry about whatever effect the modification has on my mind...what are you trying to prove anyway?

If you want me to measure 0-60kmph in so called "scientific way" using a speed gun or a Gps device,its not possible because i don't have any resources required for the tests..........

Everything is because you have posted the results of/your opinions about the modifications on your bike in a public thread where all of us participate in the ongoing discussion.

nope.......just revving high like a Ducati

Yes. You dont need any mods to reach those speeds. So, it must be the first time manu has redlined his bike in those gears.

But, this "improved acceleration" can be quantified by launching two gs's side by side to see who is faster.


Its always good to have skeptics around to keep us grounded.

Manubhat can give you your answers with proof on both counts. But here is my attempt anyway. Correct me if im wrong.

Possible reasons that companies dont do this:
> Like ashwinprakas said, to increase an engine's reliability or operating lifespan.
> Target audience or price bracket. The bike is targeted at a certain segment for which such additional development expenditure\efforts is not necessary.
> If in case a demand should arise for a bit more power, companies could respond to this by doing such modification work to the existing design....assuming that they might have already engineered some room to accommodate such modifications into the original design. If joel's modification works, then they have.

Such room for improvements could also be inherent with any engine design. Or it could be the modifier's insight into engines that lets him see such possibilities for improvements that others fail to.

Of course, this is all theories and assumptions. But none based on thin air.

Now onto the FE part....while manubhat can probably supply the facts to dispel your doubts, its not hard to believe that an increase in powr can increase FE as well. Now I dont know how porting can increase FE. But I remember reading somewhere that an increase in compression increases torque by a considerable extent, so that it takes lesser throttle to move a gear at the same speed as it does to move it at lower compression. So, increased FE. But at a cost.

Lets suppose that there is an increase in FE due to the mods. This FE gain is offset by more strain on engine components due to the mods.

If there is an increase in torque(which is the point of this mod business), there must be more strain on the piston, crankshaft and all related parts that are now needed to function at a higher pace than usual. So, more wear and tear overall.

Here, 10% increase in FE means 4.7 kmpl extra over company claimed 47 kmpl(city riding conditions). Thats a savings of about rupees 1500 (at the current petrol rate of ~ rs.73.5 in bangalore) for every 10000 km of operation. More power means chances for increased clutch wear, chain\sprocket wear, tire wear, decreased operating life of spark plug and air filter and god knows what else. So, that FE savings is meagre compared to the potential for escalation of running costs due to faster wear of components.

+ most of the target audience is more than happy with what the vehicle is capable of and probably dont even approach the vehicle's limits.

So, even if it is possible to increase FE by such mods, its no wonder why suzuki dont do it themselves. No wonder gs150Rs and unicorns are seen as less troublesome than apache's and pulsars that make more power than our bikes do, at the same cost.

It appears that power output, FE/running costs and longevity of the engine are linked by a balance. Any 2 gains happen at the expense of the third. Or any gain happens at an expense. It is upto you to decide which gain you value more.

---------

@manubhat: test out against a stock GS, preferably one that has run lesser than yours.....and let us know man. Acceleration and mileage wise.We are curious.

Mine wasn't take to the red lines ever till my 8k kms.. Last week tired to touch it each gears upto 4th... Did tried that for few days too...

I too feel the change in acceleration in my bike... It's very repsonsive..

I'm not posting this with regards to Manu's post..

This I tried after Vikhyath's suggestion to dbosnit ..

Yes...its beautiful up at the top of the revrange.

What suggestion?

Good that youve escaped serious harm.

My bike is similarly scratched up after my last accident. The bonus on my bike was that the fork and crash guard was slightly bent and the handle bar heavily bent.

I didnt claim insurance on plastics. Ive let them be to remind me of the accident, lest I become complacent. Like they say.....out of sight, out of mind.

> whats a 407?

> theres no comfortable braking method wherever youre facing an accident.

This one.,


TATA 407 Van/Truck

@all :::

Added rewinding procedure to my album..

Please go through it and tell me anything needs to be corrected...

Still one more step for completing the DC setup is pending..

Will complete it ASAP..,

Many people do not explore the response of the engine at higher RPMs. It might be because from their early days of riding, they have been instructed not to do so. But the point i'm putting forward is its always better to know the response of the engine thoroughly because you never know when you might need it.

But the downside of this is, after experiencing the power at higher revs, we tend to become accustomed to the power and shift very high up the range. This is where the mindset and and shift indicators on our bike come into the picture.

[QUOTE=2strokerama;775784]Yes. You dont need any mods to reach those speeds. So, it must be the first time manu has redlined his bike in those gears.

But, this "improved acceleration" can be quantified by launching two gs's side by side to see who is faster.


Its always good to have skeptics around to keep us grounded.

Manubhat can give you your answers with proof on both counts. But here is my attempt anyway. Correct me if im wrong.

Possible reasons that companies dont do this:
> Like ashwinprakas said, to increase an engine's reliability or operating lifespan.
> Target audience or price bracket. The bike is targeted at a certain segment for which such additional development expenditure\efforts is not necessary.
> If in case a demand should arise for a bit more power, companies could respond to this by doing such modification work to the existing design....assuming that they might have already engineered some room to accommodate such modifications into the original design. If joel's modification works, then they have.

Such room for improvements could also be inherent with any engine design. Or it could be the modifier's insight into engines that lets him see such possibilities for improvements that others fail to.

Of course, this is all theories and assumptions. But none based on thin air.

Now onto the FE part....while manubhat can probably supply the facts to dispel your doubts, its not hard to believe that an increase in powr can increase FE as well. Now I dont know how porting can increase FE. But I remember reading somewhere that an increase in compression increases torque by a considerable extent, so that it takes lesser throttle to move a gear at the same speed as it does to move it at lower compression. So, increased FE. But at a cost.

Lets suppose that there is an increase in FE due to the mods. This FE gain is offset by more strain on engine components due to the mods.

If there is an increase in torque(which is the point of this mod business), there must be more strain on the piston, crankshaft and all related parts that are now needed to function at a higher pace than usual. So, more wear and tear overall.

Here, 10% increase in FE means 4.7 kmpl extra over company claimed 47 kmpl(city riding conditions). Thats a savings of about rupees 1500 (at the current petrol rate of ~ rs.73.5 in bangalore) for every 10000 km of operation. More power means chances for increased clutch wear, chain\sprocket wear, tire wear, decreased operating life of spark plug and air filter and god knows what else. So, that FE savings is meagre compared to the potential for escalation of running costs due to faster wear of components.

+ most of the target audience is more than happy with what the vehicle is capable of and probably dont even approach the vehicle's limits.

So, even if it is possible to increase FE by such mods, its no wonder why suzuki dont do it themselves. No wonder gs150Rs and unicorns are seen as less troublesome than apache's and pulsars that make more power than our bikes do, at the same cost.

It appears that power output, FE/running costs and longevity of the engine are linked by a balance. Any 2 gains happen at the expense of the third. Or any gain happens at an expense. It is upto you to decide which gain you value more.

---------

Awesome perception 2strokerama

Absolutely right... Nowadays I used do shift gears at higher rpms frequently... Following full clutch method..

Within a week of purchase I changed the indicator to no blink mode.. No plan in getting back to it .so I've to change my mind set..

Riding at speeds of 70-85kmph with more stop and go conditions..sometimes touching 90..
And even at these conditions too it delivers a good average of 52kmpl approximately (For 2.87litres of fuel - 150kms covered)..

Without any mods it's already doing its good performance..