bike has come out beautifully. which workshop did u get the work done at ?

the 5 speed kit that ur talking about for about 2.5k change includes the 3rd , 4th and 5th gears of the 5speed which are different from that of the 4speed. Did this mod recently on a friends bike and its good VFM.

If u port a 4speed or a 5speed bore and run it on a 4 speed transmission u will face a big drop in rpm between the 3rd and 4th gears. This problem is reduced due to the closer ratios of the 5 speed gb. A better gb from a purely performance objective would be the rxk close ratio gb amongst other combinations + clutch bell etc.

4 speed bores also makes alot of sense in blore city because of the additional low end torque that can be readily tapped into while negotiating our horrific traffic here .

My only suggestion is that u change ur present exhaust becas the cat. con is simbly utter nan sanse !! Fling it as far as u possibly can ( beware its really heavy !! ) and plonk on an expansion chamber . U will truly fly.

Cat cons are an eye sore to me cas i know however beautiful and emmaculately maintained an RX is ... it will never ever go fast with a cat con and a ratty porki rx from shivijinagar with an expansion chamber will pee all over it in a race...

thanks Vampire

i know cat con is heavy - but i don't want to lose out on rideability factor it provides in city. i might try a rx135 chrome silencer in future. but no exp. chambers for me. if you see i have tried to keep it as stock as possible and definitely 'll not be opting for an exp. chamber.

going fast well i never did anything to go fast till now.. all efforts are to make it go as a healthy rx should go.
and regarding 'ratty porki rx' from Shivajinagar... i know they are all pee and thats why i don't go near such things
i ride for my satisfaction only

^^^ Make that +1.
Its pity that the RX has lost its charm to the guys who God alone knows wants to make what out of the bike...
I have a RX-100 and run the cat-con silencer, it revs higher and gives a more smother ride...
@bhp please share some more pics and also the cost involved in chroming,painting, parts. I had redone my RX-100 about 5 years back and just out of curiosity want to see the price difference...

Again you have a very sweet bike dude...

^^^ "expansion chambers" being factory fitted and bought from ShivajiNagar are two opposite ends of the world...None of the 2-strokes you see in India come with factory tunned exhaust and just by putting a chamber if you think you go fast then thats fast for you my friend....
What carbon deposits are you talking about...A OE would make a silencer that cause a higher, faster and excessive build up of carbon...Please explain me and enlighten me...BTW to let you know there was a time when on MMSC RX-135 used to be raced they were running these catcons on them...Now i don't think that was because of emission norms....

thanks RD
'll post pics as i click them. after these pics i have added few more things like new proper stand etc.
cost so far it is more than 23K all inclusive.
-painting and tinkering of chassis, engine panels, petrol tank cost me around 7.5K
-rest all new spares and stuff

+1 i agree


but as RD said there is a lot of difference between a factory chamber than a jugaad. AFAIK every bike needs a properly custom tuned chamber otherwise you will be doing more harm to the engine

+1 again
as i said 'll try for sure.

yes indeed, because at every little change in carburretor setting (like upsiziing jet, or free flow air filter) will demand a differently tuned chamber, the diverging and converging portion of it has certain angles in it which are reflection of charge travelled through pipe.

@Vampire. since you seem to have a pretty good experience in Chambers, can you provide me with some values for a stock 4 speeder? Im thinking of building my own pipe.

1. Exhaust port diameter.

2. Exhaust open degrees ATDC.

3. Con rod length.

4. BMEP

THANKS!

@Nitesh Im sorry but i cant seem to remember any of those figures off the top of my head. Stock ?? Now whats that ? i do not have a single stock 4 speed bore to measure exhaust port dia and tell you - all of them have been worked on.

50mm is the motorcycles con rod length and mine is 6.5 inches. Which would you prefer ?

THANKS !

ps: maybe you should redirect your sincere queries to Atul or your new found gurus. Cheers.

@ Race Developed : Even crude expansion chambers show increases in power over standard free flow exhausts on 2 strokes , whether made in Shivajinagar or by NASA. Surely u cannot expect major manufacturers to mass produce chambers when consumption is so low in India. However they are mass produced in South East Asia from where we get the "Bangkok Chamber". The ones raced at MMSC were because they had to follow class regulations of not changing company fitted exhausts. Cat. Cons have a filter element that have a shelf life and are also restrictive leading to excessive carbon build up in the exhausts due to the process of combustions which in turn blocks the exhaust and leads to excessive carbon build up in the cylinder as well , which in turn will cause your engine to overheat and cause damage. Does that make sense to u ? Made sense to me when I was told about it. My bike came with a cat. con too and i generously donated it.

Oh Atul is it? is he still tracable?? He's become more Infamous rather than Famous. Maybe in Bangalore his whereabouts are known to some . You sure the conrod is 50 mm? thats 5 centimeters! and 6.5 Inches?? I would love to see the bike perform. I always thought the conrod was measured only in mm's .

P.S- New found Guru's? you must be kidding!! I do take sincere advices from real knowledgeable people as and when required, but 'GURU'S'?? GURU'S are for 'CHELA'S' dude, not for me !

Vampire, i went throught your posts in this particular thread. Very true & funny too. Loved it. Even an off the shelf chamber will show noticable changes in the performance as compared to heavily restricted Cat-Con silencer.

Doc, con-rod length (Of a bike) should be same as stroke length, which is 50mm. Regarding 6.5", vampire seems to be talking about his personal con-rod. I hope you understood.

Since we are talking about chambers, the conrod measurements are taken from centre of the small end to the centre of the bigend isnt it? And talking about his personal rod he is free to have his preferences.

Exhaust port diameter? Didn't know exhaust ports were circular.

There we go again.. Sunnyboi we are talking about chambers. There is a way to calculate rectangular ports and the mean dimensions are noted.

Whats your problem eh?? i ask you some piece of information thinking you are some expert on chambers and when you dont have any info/ knowledge to share you start blabbering ! You have answers post them and if you dont just dont spoil the forums atmosphere.
I also cant seem to understand your fixation on my so called imaginative 'Guru'. If my 'Guru' is ACUALLY capable of building a pipe i WILL ask him to make a pipe for me! Whats wrong in that? Atleast he knows his stuff !

Stay away from your posts? whos interested in meaningless ones? Besides i wont fall to your level so dont worry. and this forum is not your property of yours to tell me that. Im free to post anywhere i like so stop threatening.

Correction: con rod length should be twice the stroke length for all ic engines be it for 2 wheeler 4 wheeler or for more