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**thefalcon** · 08-25-2010, 11:41 PM

Originally posted by manubhat View Post

Thanks for the info.. i wasnt online for many days so might have missed that discussion..
Try ring roads..u can easily touch 100++ if ur an insane rider like me..lol
i did it today on K.R.Puram hanging bridge[wet road+rain]...

I touched 95 on the inner ring roads itself..

Couldnt go more than that. But there seem to be interceptor vans everywhere(even outer ring road) so i'm always hesitant to go beyond 70.
(coming down to 50 is much easier from 70 than 90 or 100 when you see those vans parked in the side of the road )

Originally posted by sasmit View Post

As in the name " piot jet air screw" if you're tightening it , you're reducing the amount of air that goes into the pilot jet. If the amount of air is reduced it will draw more fuel in. Conversely if you're opening it you're allowing more air into the pilot jet reducing the amount of fuel it is drawing.

Your explanation seems correct based on the assumption that its a pilot air screw..

But is it an called air screw in the first place ??

If i remember correctly, its a fuel screw in 4 stroke bikes and it controls amount of fuel and not air.
(and it was an air screw in the older 2 stroke bike carbs)

**piyush22** · 08-26-2010, 12:14 AM

Planning on buying a bike!

Hi Guys,

I'll be turning 18 in a few months and my parents will be buying me a bike (budget 75k). I have read through most of this thread and GS150R seems like quite a good bike for me...
the first time when I saw the pics I was like "man it looks like a Passion Plus", then I saw it parked in the parking lot of my college and MAN it's huge! Looks are quite good in my opinion (not as good as FZ but quite good).

What I actually want in my bike is as follows (in order of priority):
1. Decent Performance ( i think this bike fulfils that)
2. durable and carefree with good service
3. decent mileage (anything above 45 is fine)
4. decent looks

I'm riding a 20yr old Kinetic Honda DX right now so practically anything I buy will be WAY better than it.

I have ridden a bike before but just twice (platina & apache). I have sort of understood how the clutch and all works and how to release it but i'm not exactly used to it. So please let me know if this bike is good for me as a beginner.

I live in Pune.

**sasmit** · 08-26-2010, 12:38 AM

Originally posted by thefalcon View Post

Your explanation seems correct based on the assumption that its a pilot air screw..

But is it an called air screw in the first place ??

If i remember correctly, its a fuel screw in 4 stroke bikes and it controls amount of fuel and not air.
(and it was an air screw in the older 2 stroke bike carbs)

It is still the "air screw " just because the engine is a 4 stroke doesn't mean the carb principles have changed. If the screw is between the engine and the carb it is most probably a fuel screw, if it is between the intake and the carb it is an air screw.

***MIHIR*** · 08-26-2010, 01:00 AM

Originally posted by adi231189 View Post

@anup you sure about it i thought it was anticlockwise=lean and clockwise = richer any body can confirm this?

and my max speed touched is 114 full throttle open.

Anup is right anti=richer

Originally posted by manubhat View Post

Finally the wait is over.....i got my bike's first service done today...

odo reading:700kms
problems faced before service:
1]gear shifting had become very hard.
2]headlight focus[points to sky]
3]Noise from chain.
4]low mileage[<40kmpl]

after service:
1]not solved.
2]adjusted...feels ok now.
3]solved
4]have to check in few days.
I got my bike from svc at 4pm today..i was waiting for this moment to unleash the beast.i was able to reach 105kmph in ecomode at 8k rpms

..top end acceleration is great...better than rtr's in my opinion

one more thing i noticed today is,rear wheel rotates when the bike is centre stand,with engine turned on[neutral].even the speedo shows 4-5-6kmph...is this normal?

yes, i know that. Its actually drag due to the crankshaft rotation, as gears on crankshaft n counter-shaft are in constant mesh{we have Constantmesh GB}, & its its good actually it ultimately suggests that your throughout transmission is free...
about speedo, as speedo sensor is connected to tyre it ll show the tyre speed. if you drive tyre by hand then also it will show certain speed

Originally posted by sasmit View Post

"Carb screw" is actually called "pilot jet air screw" , if you are tightening it ( turning clockwise ) you're making the mixture richer ( during idling and part throttle ) if you're opening it ( anit clockwise ) you're making the mixture leaner ( idling and part throttle ).

The air screw only controls mixture ratio till about 1/4th of throttle, beyond that the needle height in the slide controls the mixture ratio. when your throttle is wide open the mixture ratio is dependent on main jet number a.k.a size and the carb dia ( venturi diameter ) e.g. for the mikuni BS26 its a 26 mm dia venturi.
So if you're feeling the sluggishness somehwere around 70kph the pilot air screw is not to blame, if your intial pickup at part throttle i.e low revs is sluggish most probably your air screw setting is wrong.

. very nice indication of proper mixture is the spark plug insulator, if you have a nice chocolate brown color your mixture is spot on.
. If your plug insulator is white your mixture is lean
. black ,mixture is too rich ( or your piston rings, valve stem oil seals are leaking oil which is causing soot deposition )

plugs

I think he is right. But i still say it controls the fuel supplied by use of suction air pressure.(air bleed).
in 2 stroke engines they use Air control rather than fuel control.
Fuel & Air go Inversely proportional.
sasmit has written in opposite manner

but to keep it simple n sweet
Remember, ANTICKOCKWISE MAKES MIXTURE RICHER
CLOCKWISE MAKES MIXTURE LEANER
yes its very good to check the spk plug for combustion characteristics
It should be light brown
white=leaner mix
oily=worn piston ring, oil leak
dark black=richer mix

**adi231189** · 08-26-2010, 01:03 AM

Originally posted by *MIHIR* View Post

Anup is right anti=richer

yes, i know that. Its actually drag due to the crankshaft rotation, as gears on crankshaft n counter-shaft are in constant mesh{we have Constantmesh GB}, & its its good actually it ultimately suggests that your throughout transmission is free...
about speedo, as speedo sensor is connected to tyre it ll show the tyre speed. if you drive tyre by hand then also it will show certain speed

I think he is right. But i still say it controls the fuel supplied by use of suction air pressure.(air bleed).
in 2 stroke engines they use Air control rather than fuel control.
as Fuel & Air go Inversely proportional. sasmit has written in opposite manner

but to keep it simple n sweet
Remember, ANTICKOCKWISE MAKES MIXTURE RICHER
CLOCKWISE MAKES MIXTURE LEANER

So that means if want to get more mileage out of the Bike then Clockwise direction ?

***MIHIR*** · 08-26-2010, 01:12 AM

Originally posted by adi231189 View Post

So that means if want to get more mileage out of the Bike then Clockwise direction ?

nope its not like that
simply speaking fuel qty is like Blood Ps either low/high both are bad
lean mix will give poor combustion means that all fuel that enterd combustion chamber wont be burned because low poor combustion initialization.
on other hand rich mix wont get burned too, because of low oxygen available in combustion chamber to burn that extra qty of fuel...
its qty must be optimum.

its around 4-4.5 turns anticlockwise from dead position

**sasmit** · 08-26-2010, 01:29 AM

Gosh even I am getting confused now ... depending on your carb the idle mixture adjuster a.k.a ( air screw / fuel screw ) could be for either controlling air in the pilot circuit ( air screw ) or fuel in the pilot circuit ( fuel screw ) . Mikuni BS types idle mixture adjuster is a air screw I think

check this Mikuni carburetor operation and tuning

***MIHIR*** · 08-26-2010, 01:37 AM

Originally posted by sasmit View Post

Gosh even I am getting confused now ... depending on your carb the idle mixture adjuster a.k.a ( air screw / fuel screw ) could be for either controlling air in the pilot circuit ( air screw ) or fuel in the pilot circuit ( fuel screw ) . Mikuni BS types idle mixture adjuster is a air screw I think

check this Mikuni carburetor operation and tuning

"The needle jet is where the jet needle slides into. Depending on the inside diameter of the needle jet, it will affect the jet needle. The needle jet and jet needle work together to control the fuel flow between the 1/8 thru 3/4 range. Most of the tuning for this range is done to the jet needle, and not the needle jet. "

above lines are directly copied
this needle ultimately controls fuel flow.

If you are talking about what is written about that fig no 2...
see it yourself our screw is located at front side not the back side,
n valve shown in fig no2 regulates fuel by virtue of air doesnt it??

***MIHIR*** · 08-26-2010, 01:46 AM

Guys how to adjust upper dipper positions of headlight????????
what EXTRA things will be required to change Parking lights myself to LED

**mathewsyriac** · 08-26-2010, 02:40 AM

Originally posted by sameershiraj View Post

Thanks Rajat.

Sure I will post bike pics. I have selected grey colour. My bike will be in hand in one week. Waiting for it now

Hey!!!!
Today evening when u called up Mr Kalyan, i was besides him at that time

Actually, i went there to collect my bike after service... And u know what???
When we came outside the showroom, saw a brand new Gray GS150 outside the showroom and ur name was written on the number plate

So, i saw ur bike first

**MSN1** · 08-26-2010, 08:38 AM

Can someone tell me what is Suzuki Pulsed-secondary AIR-injection (PAIR)

Can someone tell me what is Suzuki Pulsed-secondary AIR-injection (PAIR)

Don t worry its not their in GS it seems this is in slingshot and suzuki claimed it give more mileage and less pollution

would like to know what exactly it is

**basumataryraj** · 08-26-2010, 11:18 AM

Originally posted by *MIHIR* View Post

Guys how to adjust upper dipper positions of headlight????????
what EXTRA things will be required to change Parking lights myself to LED

if you mean how to adjust the throw of headlight then there is screw behind the headlight assembly. You would be able to see it when the handlebar is towards the left. Turning the screw clockwise will raise the beam and vice versa. To change the pilots you would not need anything other than the leds. Raj

**MACH50** · 08-26-2010, 11:59 AM

@sasmit-if you are tuning the air-screw,its anticlockwise is leaner and clockwise is richer.
If you are tuning the fuel-screw.its anticlockwise is richer and clockwise is leaner.

On 4stroke bikes the Fuel-screw is tuned.
On 2stroke bikes the Air screw is tuned.

I have both the bikes and I know it,trust me.
My 4T is Suzuki GS150R.
My 2T is Suzuki Shogun.

So please don't make it confused and complex

**adi231189** · 08-26-2010, 12:34 PM

Originally posted by MACH50 View Post

@sasmit-if you are tuning the air-screw,its anticlockwise is leaner and clockwise is richer.
If you are tuning the fuel-screw.its anticlockwise is richer and clockwise is leaner.

On 4stroke bikes the Fuel-screw is tuned.
On 2stroke bikes the Air screw is tuned.

I have both the bikes and I know it,trust me.
My 4T is Suzuki GS150R.
My 2T is Suzuki Shogun.

So please don't make it confused and complex

Now really i am confused so if i want to get more out of the bike in terms of mileage which side should i turn clockwise or anticlockwise?

**dcs** · 08-26-2010, 12:44 PM

Originally posted by adi231189 View Post

Now really i am confused so if i want to get more out of the bike in terms of mileage which side should i turn clockwise or anticlockwise?

If you really want to get better mileage, dont target the AF mixture Screw. Target a better riding practice, and I assure you you will gain considerably towards fuel efficiency.

There isnt too much to fiddle with AF Screw as there is just one sweet Spot which has the best of everything. anything a little here or a little there would either take the power or the FE away.

Efficient riding contributes a lot towards the Mileage and believe me, using the throttle, clutch, gear and brakes wisely would do the trick.

dcs

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