OE Exhaust verses Y piece and Remus etc

[Bubb]

Serious question:

What are the pro's and cons of the OE exhaust system, verses a Y piece, plus
aftermarket silencer (Remus/Scorpion etc) ?

Apart from the Y piece being lighter, are there real benefits from swapping the standard cat for a Y piece. What is the rear wheel horsepower gain from opening up the exhaust system with Y piece and louder can?
What Im really asking here is: BHP increase per Quid spent.... is it worth it?
Or do people just do this for the extra noise, and to shed a couple of pounds off what is a lardy bike (not a criticism in any way... they are heavy)

Thanks in advance.

Bubb

 

[Flanners]

Just whipped off my cat and OE can, put a Y piece and a Remus Genesis on it. Sounds nicer, looks better, is lighter, much better pick-up and the midrange is a lot better. I did the wiring mod 5-6 after removing the OE plug.

Negatives: it pops at times and has started at low revs to surge whereas the OE set up did not surge.

I am in two minds whether to leave it on, will give the 'brain' a few more miles to adapt or change the fuel map wires about; the OE stuff weighs a ton, I hope I can sort the surging.

 

[Steptoe]

A remus sounds faster but really makes no difference.
Plus the louder noise isn't much fun when you ride long distances, it's very tiring i can do without it.

I run a remus Y piece and standard end can.
Weight isn't much of an issue with all the other crap people add onto their bikes

 

[Jiffy176]

Mine came with y piece and Remus. Not to my taste. After playing about I now have cat and Remus. Wouldn't be bothered with Remus if it had not have come with it. Found bike responded better with the back pressure of the cat ( which is a silencer in its own right). Mine surged a fair bit and pinked on standard set without cat code plug. In the end I found a used techlusion and had
Tts set it up. Now runs lovely and I can use a gear lower around roundabouts etc. others will disagree but unless you are going for decat, can air filter and a remap can't see the point. I
would imagine the remap with the other bits would make some difference but you talking neary a grand if all gotten new for 10 maybe 15 hp. When mine was on the dyno it showed high 70s bhp

 

[Flanners]

Having lugged the cat and the OE can into storage in my garage I have to disagree there is a substantial weight saving to be had getting shot of them!

 

[John Armstrong]

Anything other than the original box plus end can might fry your left rear indicator / number plate / plastic pannier.

 

[Dazzle]

A remus sounds faster but really makes no difference.
Plus the louder noise isn't much fun when you ride long distances, it's very tiring i can do without it.

I run a remus Y piece and standard end can.
Weight isn't much of an issue with all the other crap people add onto their bikes

I have to admit I agree 100 % my GSA came with y piece and Remus,
Tried it for a while put the standard can back on, not too load but annoying on a long trip, much Quieter and seems smoother, mine has BB performance chip for what that's worth doesn't seem much different than my standard Gs i used to have, only acceleration in top and that's down to GSA gearbox, myself I'd prefer an overdrive top like standard.

 

[Coolcarbon]

Found bike responded better with the back pressure of the cat ( which is a silencer in its own right).

Which is why a few of us have junked the Can years ago and run with a 'Stubby'...