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**sunilg** · 01-29-2012, 12:25 PM

Query approved.

**Streetfighter** · 01-30-2012, 12:59 PM

Depends on how much you want to spend. A slip on with decat pipe will suffice. Air filter would be nice but PC-V is essential. Akrapovic or racefit would be my choice but mind you, the latter is mind numbingly loud, my first choice though. Akra and racefit come with decat pipes. Not the CE approved for road use akra though.

**capt** · 01-30-2012, 05:59 PM

Originally posted by Streetfighter View Post

Depends on how much you want to spend. A slip on with decat pipe will suffice. Air filter would be nice but PC-V is essential. Akrapovic or racefit would be my choice but mind you, the latter is mind numbingly loud, my first choice though. Akra and racefit come with decat pipes. Not the CE approved for road use akra though.

Thanks for the input bro! Though as per the Honda forum ,there are a lot of views.Mostly recommend a PCV or PC3 for extracting max performance from the exhaust n decat but some have fears of engine damage due to the bike running very lean.
Well various manufacturers of the decat linkpipes provide for the lambda sensor ,so i dont see why the original ECU should not take readings from the sensor and adjust the map settings.
I'm being optimistic as dont wanna burn a big hole in my pocket.
I like the yoshi R77D which is a 3/4 system and eliminates the cat.
Any more suggestions.... welcome!!!

**Streetfighter** · 01-30-2012, 06:50 PM

The PC is there to ensure you don't run dangerously lean. In an ideal world the ecu should adjust to richen the afr but do you want to take a chance with your hard earned money? Most bikes run lean with factory exhausts anyway.

The yoshi is a new entrant in the CB market, good reports but I still love the racefit growler.

**Carlitos** · 01-30-2012, 10:59 PM

Most exhaust manufacturers do provide for a lambda sensor, but the stock or factory lambda sensors have a limited bandwidth which is sufficient for the stock ecu and an exhaust system with a CAT. PCV/PC3 can be purchased with an optional wide band lambda sensor, which works best if you intend on getting a custom tune.
Also, a lot of the maps available on dynojets website for various aftermarket exhaust systems are generally maps developed with the lambda sensor disconnected. I would suggest going for an exhaust system setup for which dynojet already has a map available since finding a dyno shop to tune your exhaust setup in India might be difficult. Safest option would be to get a slip-on and hook it up with a PCV just to be on the safe side. Slipon maps are generally simple to develop and there arnt too many factors changing and so the slip-on maps available are generally good.
Yoshi, Akra, Leo Vince, Racefit, FMF are all great exhausts.

**Streetfighter** · 01-30-2012, 11:12 PM

Factory lambda sensors only provide readings up to a certain rpm range to pass emission norms which aren't measured at higher ranges. WB lambda sensor is needed if you plan on running auto tune.

Many slip ons eliminate the lambda and the PC for certain bikes comes with O2 eliminators. For the CB the eliminators aren't included, get them additionally. They are cheap.

Don't over complicate matters, get a slip on of your liking, if it doesn't eliminate the cat get an additional link pipe. Get a PC-V and load a map from dynojet's site matching your specs or ask someone on the dedicate forums to give you their map which matches your set up. For the CB, a quickshifter is only an additional 10-12k, you don't need the extra module which other bikes need thereby saving 25 to 30k.

**insaneroller** · 01-31-2012, 12:33 AM

Leave the common ones aside & go in for a Hyperflo CF. they are Honda specific exhaust maker. Check it out. You will get proper maps & the O2 optimiser will work well with the pcV...

**capt** · 02-02-2012, 12:22 AM

Hey guys!! Between a slipon and a full system,would there be an increase in power if i install a slipon or its just gonna make noise.
Does a slipon require a PCV ?

**Bladerunner** · 02-02-2012, 01:39 AM

Go with the Yoshi R77D CF. Its a superb sounding exhaust.

**Carlitos** · 02-02-2012, 03:54 AM

Originally posted by capt View Post

Hey guys!! Between a slipon and a full system,would there be an increase in power if i install a slipon or its just gonna make noise.
Does a slipon require a PCV ?

Slip-ons will increase power a bit, but not as much as a full system.
You definitely require a PCV with a full system, but its not a required for a Slip-on. Different people have different opinions on this. Lots of exhaust manufactures( leo Vince, FMF, Arrow) clearly state on their websites that their slip-on pipes require no re-mapping and work perfectly with stock fueling. On the other hand, dynojet has a good database full of maps for slip-ons. I would say, if you have the cash, go for it. Or else get the slip-on now and get a PCV later when you do have the cash. Doesn't hurt to be on the safe side.

**kinshuk.arya** · 02-02-2012, 09:50 AM

Originally posted by Carlitos View Post

Slip-ons will increase power a bit, but not as much as a full system.
You definitely require a PCV with a full system, but its not a required for a Slip-on. Different people have different opinions on this. Lots of exhaust manufactures( leo Vince, FMF, Arrow) clearly state on their websites that their slip-on pipes require no re-mapping and work perfectly with stock fueling. On the other hand, dynojet has a good database full of maps for slip-ons. I would say, if you have the cash, go for it. Or else get the slip-on now and get a PCV later when you do have the cash. Doesn't hurt to be on the safe side.

when we are putting in a slipon or a full system we are not changing the inlet charactristic of the bike.... the exhaust system is used just for scavenging the burnt gases??? then why do we need fuel remapping??

i can understand why we would need a fuel management if we had changed the air filter or the sub throttle plates but why do we need a fuel management when we are putting in just a exhaust system?

**capt** · 02-02-2012, 01:18 PM

Originally posted by Bladerunner View Post

Go with the Yoshi R77D CF. Its a superb sounding exhaust.

Yeah Bladerunner! Thats what i had in mind.I've seen the YoshiR77D on you tube and it sounds and looks great.
Any one using the same??Well comming back to the thread,do i use a PCV with the Yoshi R77D which is a 3/4 system and it has a link pipe decat with a threaded socket for the lambda sensor .Comments please !

**rahulk2008** · 02-02-2012, 01:34 PM

Originally posted by capt View Post

Yeah Bladerunner! Thats what i had in mind.I've seen the YoshiR77D on you tube and it sounds and looks great.
Any one using the same??Well comming back to the thread,do i use a PCV with the Yoshi R77D which is a 3/4 system and it has a link pipe decat with a threaded socket for the lambda sensor .Comments please !

I heve recently fitted the yoshi r77 slipon(without pc5) on my 2011 cbr 1000rr. It sound awesome(very deep and loud). As far as i know without a pc5 there surely will be a slight decrease in power and smoothness(from what ive observed). Ive heard an akropovic on the cb1000r,and it doesnt sound loud at all. Take a look at the leovince gp pro as it run equally well withour a pc5.

**Bladerunner** · 02-02-2012, 03:28 PM

When you put an exhaust (especially with an air filter), the bike starts to run lean usually. Also because you're getting rid of the cat con. The PC5 corrects that with the map for the exhaust you have.

You can go without a PC5 if you're not going with an air filter and you don't ride hard all the time. You can install a PC later. The Yoshi is the best for this and the fireblade. Go for it!

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