B1U9: Free Flow Exhaust Explained | Myths Cleared | Royal Enfield

[@balajisundarrajan9684]

Great content brother. Would like to add few things. 1. Indian bullets do not have catalytic converter , but a heat sinking jaali , that soaks a lot of heat at the end of bend pipe which burns unburnt hydrocarbons. This heavy restriction causes a lot of back pressure , so much that, how much ever free flowing the remaining of your exhaust is , it doesn't alter the back pressure. So a free flow exhaust + *a hollow bend pipe* + an upjetted carb + free flow air filter gives a nice boost in performance. 2. Exhaust gases should be evacuated quickly and in large amounts, so a free flow exhaust may have more "volume" for gases to pass through but certainly no provision to push it out at high velocity. So restrictions are always not bad. Also an improper AFR may result in exhaust backfires,fouling plugs and worse , burnt valves. 3. With free flow exhausts , there will be a considerable loss in bottom end torque but a better top end , since REs seriously lack power , i highly doubt the benefit of using aftermarket exhausts other than some minor weight reduction and better(subjective) acoustics.

[@BulletismUnlimited]

+Balaji S great info Brother... I'm currently using a free flow long Punjab with a knn air filter.. I find a good low end torque and a quite decent performance all the way till 80-90 kmph! Just that, I notice a few mis mires at times.. but overall, no major set backs.. Btw, I also got a free flow bent pipe, but, the exhaust note was so loud that I had to go back to stock pipe...

[@balajisundarrajan9684]

Bulletism Unlimited Are you done with the lastest jugaad ? The one which we were discussing in quora

[@BulletismUnlimited]

+Balaji S oh, it you!! Not yet bro... The mechanic who promised to do it is unwell. Next weekend maybe..

[@balajisundarrajan9684]

Oh ok :) looking forward to see good results .

[@syedasim8640]

In free flow exhaust engine valve will be effected due to less back pressure use indori silencer for overall package

[@saicharan246]

Hlo sir i have one dout i have new classic reborn recently i have changed my bike scilencer and i switched to k indori scilencer after changing it i am getting tappet sound from engine so again i changed to stock but still tappet is getting sound so what should i do sir

[@deepakamane4937]

How is the long punjab silencer?is it free flow or is it also having filter in it? Any pick up issues are there after replacing the stock silencer

[@creators5505]

If less back pressure means engine runs lean and hot which is detramintal in the long run.

[@azeegaming1476]

Solution

[@jithu5879]

@@azeegaming1476 tune ur carbrator

[@theawakener1.6]

@@jithu5879 efi bruh

[@breslinjoshua594]

u mean that installing aftermarket exhaust like red rooster does bot affect the engine of the bike?

[@BulletismUnlimited]

+Breslin Joshua yes! It doesn't affect the engine in any way..

[@santoshrajagopalan616]

Nice video. Really informative. If I want to change my silencer to a red rooster for example I will also be installing the K&N air filter. would I need to rejet the carb?

[@BulletismUnlimited]

+Santosh Rajagopalan well, I don't think you need to right away.. Experiment one by one. RRP exhaust for a month, then knn n maybe later rejet. This way, u know the difference in performance n u start loving urbike even more ;)

[@harikrishnan232]

Hi , I am using Red rooster silencer for more than 20k kms and kn air filter. My chrome 500 bike has done 25k kms. But now I feel the drop in power , it’s become more linear 3 r 4 secs delay clearly evident during overtakes.little clanking noise is also felt from engine My mechanic says engine head needs to be changed and some problems wit fuel injector. Wat should i do now. I need performance I had plans to install powertronics ECU ,Should I change to stock exhaust and Ecu? Plz clarify, thank you!

[@BulletismUnlimited]

Maybe the mechanic is right.. get the head work done and check the fuel injector cleaned. Red rooster is a good choice, continue using it... After head work, go for ecu from RD. Take a second opinion about the head work, make sure you use motul 300v engine oil next time.. this oil does magic on a RE. All the best, keep me posted...

[@harikrishnan232]

Thank you!💐

[@dipanmodi94]

Hi, I have question.. I've 3500 km driven Bullet Electra 350 (BS4). Till now I've not done any changes in my Gun. I want to replace the silencer from Company fitted to Long Bottle Punjab silencer. Is it a good choice? As per Govt Regulations and Milage performance both? I enjoy riding my Bullet at around 50 kmph and mainly inside the city area. What is your suggestion?

[@BulletismUnlimited]

Long Punjab is a great exhaust. You can consider it right away.. I think 3500 kms is a decent reading to experiment on your bull on. No, you won't see a dip in the performance.. infact, you might start loving the improved throttle response and the better sound too.. In Bangalore the cops seem to have a problem with the loud exhausts... But ppl still use it ... Pls check how's the scene in your city... All the best .. keep exploring...

[@dipanmodi94]

Bulletism Unlimited So ultimately its a pretty good choice from the technical POV. I also believe in following Traffic Rules so If the traffic rules don't allow the Punjab Silencer here, what can be the next good choice? I'm from Ahmedabad(Guj).

[@BulletismUnlimited]

Unfortunately none of them are street legal if you ask me. The cops dislike anything thats not company fitted.. you could try short bottle... And say it came company fitted ;) But if the cop is smart, you end up paying fine...

[@dipanmodi94]

Bulletism Unlimited 😂 Yeah Thanks for the genuine info. I would check with our state and city RTO rules before replacing silencer... Thanks.

[@BulletismUnlimited]

If money is not an issue, I would say buy it.. install it on a Saturday evening, use it on a Sunday, take your bull out on a highway n enjoy city rides too ;) Right now there are no RTO rules as such... U could argue, but the cops always win... Good luck!

[@somasundarama3494]

I've changed in to Cone free flow silencer for Classic 350 gun metal grey after completion of 1st service, Now I'm getting the good thump of old bullets and enjoying it lot, It's the right one or I'm going to in wrong way?

[@BulletismUnlimited]

Yes, it should be fine... Don't worry.. enjoy the new bull ;)

[@somasundarama3494]

Bulletism Unlimited thanks bro, I'm getting low mileage 30kmpl right now, before I got 38 kmpl.. I'm so sad.. What to do now.. If I replace the stock silencer, mileage problems will be solve?

[@BulletismUnlimited]

Before coming back to stock silencer, pls get the carb tuned once... Get air filter also cleaned once... Check mileage again

[@xshay2906]

Every Bulleteer has its own concepts and Facts. In my opinion (based on the official Royal Enfield manual and Garage Mechanic Facts) In order to switch to any after market exhaust (or any modification that directly or indirectly associated with the Engine Efficiency) Royal Enfield must complete its initial Run Period. A strech Run Period will Range from 3500kms to 5000kms. It is not advisable to change or modify bike components unless and untill you have completed Initial Run Period. Your Royal Enfield needs time to adjust with the default settings.

[@Vineethkattungal]

I got a doubt ,when back pressure is low leads increased combustion , that means​ more fuel and air then fuel economy ?

[@BulletismUnlimited]

+vineeth kattungal it doesn't increase combustion, it improves combustion... A better combustion means a better fuel efficiency in many cases... Sometimes, mileage drops marginally.. but there are a lot of factors behind this again...

[@1234fazermann]

You talked about rejetting, my classic reborn is fi, what do I need to tune then?

[@BulletismUnlimited]

You have to go for a ecu remap

[@1234fazermann]

Sir my question is if I only remove the CatCon & use the stock silencer, will the thump sound better? And do all indoris, mini punjabs, etc. sound the same as I don't see a standardised manufacturing process. Each co. has their own type of mini punjab & indori. Could you recommend a co. which makes the best ones(I've heard of Sans & globe exhaust).

[@BulletismUnlimited]

I don't know in which city you live, but I will say avoid any exhaust mods for now, the cops are all over the place these days.. U can look for ecu remap, air filter change options...

[@1234fazermann]

@@BulletismUnlimited Bro catalytic converter remove karne ka police ko nahi pta chalta.

[@kishorelucky6242]

Sit i own a gun metl grey classic 350 so i want to go for indoori free flow exhaust so does it hampers my engine and effects my mileage and plz do suggest me that how to adjust the carburettor settings while changing the silencer from stock to free flow

[@gpynadath]

Which all exhausts in the Indian market are free flow exhausts?

[@aliqadri4672]

How that pop bang sound and fire came when decelerate on motorcycle on free flow exhaust...??

[@chanduhas3283]

Hi..... I want to improve my performance on the Max Speed part.. and I know it might hamper my Mielage a bit.... I am planning to buy a - K&N or BMC air filter, - change the stock exhaust to GreasHouse MegaPhone (dnt know if it is a Free Flow.. need to check...) and - upjet the carb from stock.... Can you give me details like what do i exactly need to do to upjet the carb.. Just change the Pilot and Main jet (If yes then what and which one ?)... I am using Royal enfield Classic 350 (2013)... Please add your suggestios to the above points...

[@BulletismUnlimited]

I'm not sure about the jet numbers... Any mechanic will be able to help... Along with the above mods, change the bend pipe also to a free flow one, it's less restrictive and will improve the performance further

[@chanduhas3283]

thnk u vm

[@SukhwinderSingh-lx7kr]

Bro if we fitt empty bend on bullet bs4 standard it effect on milege nd engine its true bro

[@royalriderharsha336]

S

[@nirmalanand98]

So re-jetting the carb is not required if I am using the stock silencer is it?

[@BulletismUnlimited]

+Nirmal Anand that's right... For the stock setup, you don't need to change the jet.. u could still get it tuned for either mileage or better power... A good tuner usually tries to do a balance .. so that u don't get a hit on mileage and neither is power too less

[@gokulraj5357]

Will the milege drop?

[@anilkumarmundawad6349]

Where I can get the good wild boar silencer....can you please suggest.....

[@BulletismUnlimited]

Check on olx or find out a local store

[@tyagiarpit9]

Good one man

[@Ryug-n7]

Hlo sir i need a help from you please reply

[@enfieldrider8723]

Sir you are totally different 😁. Long bottle silencer on Bs6 R.E. ❤️eny problem ??🙏 please reply

[@BulletismUnlimited]

I have not heard of any issues... but I have not used it personally

[@sylvesterreid4839]

Can we go long distance with free flow exhaust

[@BulletismUnlimited]

Yes, no harm in doing long trips

[@rahulbabu7025]

how much mileage do you get??

[@raavan71]

I doubt seriously the claims here.My friend installed short bottle aftermarket silencer in his std 350 model at about 2500 kms in the odo.the instant effect was that the mileage reduced from 38 kmpl to a mere 30 kmpl.The company mechanics also warn against such changes..

[@BulletismUnlimited]

+vinu TN this is strange. I have been using after market exhausts from a long time, not just in my bullet, but all my previous bikes. Can you ask him to get the carb tuned once, maybe lesser fuel is sufficient now. Pls don't visit authorised service centre, they are trained to discourage ppl... Any local mechanic can fix the issue. But yes, I admit, a slight dip in mileage does occur...

[@Arif-qw2lc]

vinu TN i agree Same happened with me, when i changed the exhaust

[@gabrielrocksan8210]

vinu TN hey bro don't go to the RE service centers they r the real fuckers they will fuck ur strong heart trust me just go to other local two wheeler workshops don't go to bullet experts they can also fuck u too so so go to a common two wheeler service center and check the carburettor properly bcoz carburettor is the main thing of fuel drinker so check it properly and reduce the alow speed maximum and time to time change the engine oil and use high performance engine oil and plz don't look the price of engine oil buy a good one if u like ur bike RE or not

[@sylvesterreid4839]

Does air filter reduce mileage

[@jay-yl1kr]

Ya they do

[@rahulcm4762]

Hi bro.. I'm using jb racing indori free flow scilencer.. Is it harmful to engine..? My bull 10000 km completed..

[@shree397]

bull ki gand lag chuki hai😂😂😂

[@aBhii123]

Broo u have notice any mileage drop and harmfull to engine

[@sr.venkatesan1096]

How much kilometer to run to change silencer bro

[@BadassBulleteer]

5000

[@ayushdhanda3831]

2000 is enough

[@yujirohanma2715]

After making my silencer free flow my engine is starting to make tik tik noise why is this happening??

[@damanpreetsingh2294]

Tappet sound

[@mdshadab5906]

Punjab is also a free flow silencer. Is this harmful???

[@BulletismUnlimited]

No, not at all..

[@bijitkalita006]

sir what about the Red rooster performance exhaust?

[@BulletismUnlimited]

+Bijit Kaita that's one of the best exhausts in the market right now, but a little expensive.

[@CoolGuy-oj2zg]

what do you mean by objecting carborator

[@BulletismUnlimited]

+Cool Guy it's called upjetting, not objecting. Now you are upsetting me brother ;)

[@avinashcj398]

What does upjetting means in RE's...

[@BulletismUnlimited]

+Avinash C J it simply means putting a higher no jet in the carburettor

[@avinashcj398]

Bulletism Unlimited , appreciate your reply. Can you please give me your contact number so that for any kind of doubts i can reach you. If you think privacy you can use my number in your whatsapp [phone] so that i can get some usefull info. Because every bullet must know to self treat when we are far from mechanic while trekking.

[@arshcompetitive184]

Which exast Bett dug dug sound real bullet bike

[@issadiah2173]

Klop0

[@dipanmodi94]

hi... You have helped me good in choosing Silencer. Now I want your little more help. Its my NEED. My seat cover got hard after 8 months and needed to change it. Its 3 days, new seat cover is having a thin foam layer inside cost me 300/- and when i ride it for 10 kms in city it felt hard and my shorts got sweat. So if possible suggest me good Soft seat cover having sweat absorbing material. Its trouble for me so expecting your helping suggestion asap.

[@BulletismUnlimited]

Hi, this seems like a tricky situation.bro... try going for a good leather cover, not low quality stuff... If the issue is still there... Go for a new foam all together...

[@dipanmodi94]

Bulletism Unlimited actually my seat was too comfortable without seat cover and the seat cover before this was leather but that got hard in 8 months. But as sometimes cats attacks with nails on seat so for seat's safety I require seat cover. If you can share me link from any online store as per my requirement It will be grateful. I will fit it my own.

[@BulletismUnlimited]

I'm not aware of any online store that sells it... U have to visit a local seat guy only... try to find a solution for the cats also in the meanwhile ;)

[@dipanmodi94]

Bulletism Unlimited Yes cat is not a usual problem but it happened once in my old TVS Scooty. So precautinary seat cover is required. otherwise it can lead me for whole new seat.😅 Nevertheless thanks for your suggestions. Will give you more trouble in future. 😜

[@BulletismUnlimited]

Sure bro. Anytime

[@ARYAN-db8ho]

hindi v bol le bhai... sound quality v improvement kro plz...

[@sanjeevdhar6847]

Its my advice that if u r indian youtuber.... First of all use standard quality of mic not the local one.... Secondly if u don't have a good quality mic then speak loud n in hindi....so that everyone can hear ur voice...angrej banne ki jarurat nahi h.... nothing is audible in ur video....

[@1234fazermann]

Chup kar, bharat mei more people understand English than Hindi.

[@ashishgoswami4419]

Bhai hindi hi bol leta