Query moved and approved.

I'll put it in a simple way.. a proper expansion chamber will improve the performance if jetted correctly . If its not chosen well it can decrease the mileage and ruin the engine.
Go for original Proton expansion [beware, lots of fake protons out there] . KRP quality is doubtful.

will it have any effects on mileage part too

Every performance mod has the equal and opposite reaction to mileage

A bit compromise on the mileage for sure.

:O

i will cope up with the mileage part......but what about the expansion chamber's cons........does it affect the engine or so, i m talking about the tested chamber and can't find from whre to get the proton

me too would like to know of a branded expansion chamber is availabe for the Shaolin, or if one has to designed and constructed how much does it work out to

Pros would be increase in power , sound , addictive power delivery and attention .

Cons would be drop in milage , engine life , hearing problems , dogs chasing you , cops catching you , neighbours cursing you etc.

KRP are not worth spending your money on , try them for free if possible and see if you would like to spend your money on them, same goes with Proton.

Look for chambers that dont use the stock bend pipe for a start. The best chambers will be custom built ones , I look at them as a work of art. If you wish to understand them start reading up on them and look up pictures on the net .

Chambers work like Turbos on 4 stroke motors and you can expect maximum power gains with a chamber.

No two pipes are the same so you must keep experimenting with different ones to see which one you like best for that " Ultimate Setup" . Its a long journey this one

Just remember to keep your jetting safe/ rich so that you dont hole your piston.

thanx for the replies and suggestions. I am currently changing my mind for chamber, going for a stock one

@ Vampire, what is the difference with using the stock bent pipe vs a custom made one? this we are talking about street chambers only. I feel a chamber like Proton delivers enough performance on a stock header and stock engine.

proton's good ??

he is talking about a tapered bend pipe which the key for performance on a REAL exp chamber

ofc i know hes talking abt tapered headers.. what i want to know is, how much difference would a regular street riding guy on a stock engine feel with a tapered vs stock header. I have ridden a RX with a calculated hand made chamber and one with a proton. I felt the proton was more street friendly! How many of us here fully know the physics of an Expansion chamber? Like i said in my earlier post, we are talking about a regular guy who is not much into mechanics but wants a fast street RX.
Proton have been in business for 18 yrs and were into racing as well and they still build chambers with headers if you provide them with values.

Thats a nice one. Every bit of it is true, especially dogs n cops.


As long as the bike is for street use & not drag/dirt/rally purpose, KRP or Protons will deliver excellent performance. More than chamber, it is the carb tuning & correct jetting.

KRPs and Protons run out of steam extemely fast . They deliver initial and thats it no mid no top .

To put it in perspective i would say Rallying / Dirt bikes ( in the 2 stroke indian scene ) run porting that is pretty close to stock if not stock ports itself since they need all round usable power and not peaky motors - which is also what most people prefer on the street and what many call streetable .

Take a look at the rally pipes . If Protons or KRPs are as good as you guys claim they are then they should have been extensively used by Rallying / Off road riders or they should all be running stock bend pipes with chambers built over them.

@ Yamdoot : Ill give you a hint : With a tapered header you can modify the diameter of your header and play with the shape to give you a smoother flow into the 1st diffuser of the pipe . Something that you cannot do with you stock bend pipe .

@ Kartik & Yamdoot : Stock bend pipe with a belly and end can is a very crude pipe design and it is what people in west used to run on their street 2 strokes till the late 60's , we are now in 2010 so please keep yourselves updated folks. Whatever your porting is, a well designed chamber will ALWAYS optimize performance and power delivery. ALWAYS. And a well designed chamber/ exhaust includes a very essential part - a custom header !!!

Compression Jetting Timing Porting Piping Gearing Sprocketing is the whole marketing mix.

I do agree that a tapered header will help decrease the flow resistance of burnt mixture providing a smooth flow besides increasing the chamber volume. but here we are talking more about a common RX/ 2st biker . Anyways i am yet to come across a perfect street chamber with a custom header. Have ridden bikes with chambers from well known teams and people claiming drag timings on self made chambers, the only one that impressed me completely was the Team TVS-Suzuki Rally chamber on the Shogun.