ok u obviously weren't paying attention.plz read my post again
it clearly reads "make 2 strokes environment friendly" so dont jump my throat with 4 strokes and blah..I am not comparing here in the first place

and as far as your oilpump goes. It is throttle controlled. a premix is fuel mixed which i again throttle controlled as the oil is mixed with the fuel..i have seen tons of RX's with oilpumps calibrated wrong, because of no specific measurement of flow..it doesnt take a rocket scientist to put 20ml to a litre..and a wrongly set oil pump is equally wrong as a bad premix mixture..please get basics right mate..goes a long way.

and for your argument, the electric yo bikes dont pollute as much as the modern 4 strokes too..so what?

lol..cheers

if i put 20ml to a litre of petrol in the tank and the oilpump is supposedly calibrated at 20ml as well..how it is reducing overall oil consumption?


wrong again..the fuel quantity is variable with respect to throttle position. so will the quantity of oil as its mixed with the fuel..talk about arguing for arguing's sake

let me tell you something you can definitely do..most of the regular bunk oils have to be used a 30-40ml per litre of petrol..leading to more pollution..wheras 18-20ml of fully synthetic oil gives u the same lubrication and because of better technology used the oils are a lot less polluting, plus ur using a lesser quantity per litre

hope this has helped you

An oil pump has 2 input parameters - the RPM and throttle position.

Now, manufactruers recommend 2t ratios based on 1) max RPM and 2) max load.

This obviously has to be done in case of pre-mix, as you have to use the max 2t ratio (say 2 to 3%) assuming that you will be riding at max load and max RPM all the time. Else you end up with abnormal wear or seizing when those conditions are encountered.

Now just consider the case when the vehicle is idling. In this state, both load and RPM are minimum. However, the cylinder is still sucking in gas with 3% (say) 2t. But this much 2t is just not desired in this state! I can hear you saying that even the gas required is much lower in this state. That is true, but the point is that the gas still carries a 3% oil component when maybe just 0.5% (say) is required! Same applies to other states. Say you are doing 50 kmph on a straight road. Possibly, the optimal rato at this speed might be say 1.5%... but you will still be burning 3%.

I'm surprised that these facts are missed by most people. Can you think of a single other reason why the whole oil injection system is put in place? It is not just for convenience. The aim is to reduce oil consumption.

Hence this statement (in the guise of a question):

is absolutely wrong. As stated above, the oil consumption is reduced as the auto-lube keeps varying the ratio in varying riding conditions.

Not so sure about this. Let us just not even consider the oils given by bunks. Most of the bottles of relatively better oils (mineral) I have seen, in fact recommend a 2% ratio anyway. I'm yet to see a bottle that recommends even 3%. So I'm inclined to think you might be fine with using this ratio even with mineral oils... not just the fully synth ones (I am not considering drag races in peak summer, etc.)

The fully synth ones may likely extend engine life and keep the engine cleaner... that is of course possible. I do not know if they pollute less though... have never come across any data on that front. In fact isn't it likely that the fully synth ones give out even more harmful gases? This may again vary depending on the brand and the kind of base oils used. And visible smoke is of course not a very good indicator of actual pollution.

But there is one valid point you have raised - if the pump is indeed caliberated for a higher ratio considering a lower quality oil, then it will of course it *may* use up more oil when compared to a pre-mix of a lower ratio. But this is a big "maybe".

Lastly, it again goes without saying that if the pump not optimally calibrated, then the benefit is of course diminished. Likewise with sub-optimal pre-mix ratios.

here z the link abt that...i dont know much details abt it...only so much i could source from the net..let me see if any of my college seniors know them personally.
The Hindu : Kerala / Thiruvananthapuram News : Team finetunes two-stroke engine

Whats the point of this thread? 2Strokers are banned/phased out in India anyway.

Dude get yourself an RDD CDI. I've seen people running crazy jetting on their RXs and RDs and still having non smoking exhausts. Contact torqu3e here or Ron Chinoy at rddreams.com. They'll explain better.

How often does everyone decarb their exhaust?

Thats something even I'd like to know.

My gun has done about 20 k... never done any decarbing.

@rajazz
Sir, i appreciate your concern for the environment.
Cleaning the carb,spark plug and air filter time to time is very important. Using iridium spark plugs gives better combustion which means more power,mileage and LESS POLLUTION. Catalytic exhausts,rdd cdi and right mix of oil can keep the emissions considerably low.
This is all i know. If somebody knows more, i would love to learn.

1> Perfect jetting
2> Unrestrictive airbox/airfilter
3> Well designed carburetors which do not allow AF ratio to stray too rich during sudden closuire of throttle.
4> Well setup oilpump.
5> Engine with minimal frictional losses and piston to cylinder clearance.

6> Combustion chamber with minimum surface area (Mirror finishing) minimises heat loss to head, resulting in more power.
7> A well tuned expansion chamber designed for lower, more frequently used engine speeds.