Carburetor Thread

[Ramborider]

my pulsar 150 classic doesnt tune by that fuel screw,i had changed pilot jet also but it dont get set properly,when release accelerator it get off and after or some time engine speed increases prematurely so what would be problem for this??
i had using 12.5 pilot jet while before that it has 17.5,as i have read from pulsar dtsi workshop manual about pilot jet size,but i have doubt is it same for old model or not mechanic told that have to change carburettor!!please help me out any one here having pulsar 150 classic who would having idea about size of pilot jet???

[rprathin]

i have question for how to tune yamaha gladiator because when i completely tight the fuel screw than nothing happens.....

[superbsalil_02]

cant get rpm constant on my p220.......
after going to leanest setting can i take 1 or 2 turn fast??

[sangeethskumar1]

can any of you tell the no of turns that would be optimal for p180 ug4. What does a turn means..?? is it 180 deg or 360 deg. i do most of my bikes work. but the carb adjustment is twisting me a lot.

[Rakesh Rok]

For those of you who think that a richer mixture is a gateway for more power, it may be noteworthy of a mention that even a richer mix is damaging and causes faster wear and tear.

Okay let me just agree with you that, I just got my Honda Unicorn carburetor tuned for a richer mixture, believe it or not, I had a race with an RTR180 soon after I got it serviced by the Mechanic and I was surprised to see that my Unicorn outperformed the RTR180 and was quicker from 0-60 and went till 85-90 after which the RTR took over (the last time I had a race with an RTR180 which was not in a good condition, my bike was just behind it, and this is a new bike, just around 10000k finished yet) and also a thing of note, is that the top end, yes the top end of my bike has been increased by 10 kmph, earlier with much effort, it was going to 109, now it reaches up to 120 and few more if pushed over the limits, can you explain it to me how these things happened if it not for the rich mixture. . ? My bike is around 6-7 years old now and I did not experience much of a fuel efficiency downgraded after the carburetor tuning (think it's an old bike and got fixed to that sought of mileage). . . Please don't say me that both things are the same as earlier I had tested before the tuning as well and also after the tuning to see my bike's performance. . .

[PS: Do correct me if I am wrong in anywhere]

Thank you.

[royal racer]

Carb tuning

I want to know If i tune my carb and increase the petrol how does it affect ..
it increase petrol flow in pilot jet.
it increase petrol flow in main jet
or All jet petrol flow increase.

[The Monk]

Re: Carb tuning

I want to know If i tune my carb and increase the petrol how does it affect ..
it increase petrol flow in pilot jet.
it increase petrol flow in main jet
or All jet petrol flow increase.

Query Approved and Merged

[rxdude]

Re: Carb tuning

I want to know If i tune my carb and increase the petrol how does it affect ..
it increase petrol flow in pilot jet.
it increase petrol flow in main jet
or All jet petrol flow increase.

Altering the air fuel mixture ratio will result either rich or lean mixture. Increasing the petrol means more fuel than the ideal ratio which will result in a rich mixture. Rich mix lead to incomplete combustion, more carbon deposits, fuel wastage.



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[royal racer]

Re: Carb tuning

Altering the air fuel mixture ratio will result either rich or lean mixture. Increasing the petrol means more fuel than the ideal ratio which will result in a rich mixture. Rich mix lead to incomplete combustion, more carbon deposits, fuel wastage.



Sent from xBhp Connect for iOS

I know what you trying to say but my question is different.

[bublu]

Re: [UT]: Tuning your Motorcycle Carburettor.

Dear xperts,
Previously i have problem with my pulsar200 dtsi carburetor diaphram and i have replaced my carb with bs32(220 carb) now i'm having intake manifold leakage m.i want to know that 220 carb intake manifold will be a direct fit on 200.please do reply me kindly waiting for your reply
Thanks in advance
From shravan pathipak

Sent from my A1+ using xBhp Connect mobile app

[amitmalve]

Re: [UT]: Tuning your Motorcycle Carburettor.

Could any on tell me whether the pilot screw found on honda bikes carb (viz. unicorn, dazzler, hunk/cbx extreme) is a air screw or a fuel screw?

[DukeDey]

Re: [UT]: Tuning your Motorcycle Carburettor.

Could any on tell me whether the pilot screw found on honda bikes carb (viz. unicorn, dazzler, hunk/cbx extreme) is a air screw or a fuel screw?

Afaik its an air screw. The cv carbs work by controlling the throttle butterfly valve using air flow (vacuum) which in turn opens the slide based on what the engine can handle. So the screw should be controlling the amount of air.

Sent from my GT-I9100

[Adarsh_Bk]

Re: [UT]: Tuning your Motorcycle Carburettor.

Could any on tell me whether the pilot screw found on honda bikes carb (viz. unicorn, dazzler, hunk/cbx extreme) is a air screw or a fuel screw?

Afaik its an air screw. The cv carbs work by controlling the throttle butterfly valve using air flow (vacuum) which in turn opens the slide based on what the engine can handle. So the screw should be controlling the amount of air.

In most 4 stroke bikes, it is fuel screw.

There is a simple & crude way of determining this. Just find the location of the screw on the carburettor. If it lies between engine & carburettor it is fuel screw. If it lies between carburettor and air filter, it is air screw.

[pwcrulez]

Re: [UT]: Tuning your Motorcycle Carburettor.

Wow good stuff, I am sure to try these stuff out.

[amitmalve]

Re: [UT]: Tuning your Motorcycle Carburettor.

In most 4 stroke bikes, it is fuel screw.

There is a simple & crude way of determining this. Just find the location of the screw on the carburettor. If it lies between engine & carburettor it is fuel screw. If it lies between carburettor and air filter, it is air screw.

Correct, it is a fuel screw