BMW NineT Forum banner

1 - 20 of 520 Posts

·
Registered
Joined
·
17 Posts
Discussion Starter #1
Greetings to all , I have owned my R9T two weeks now and having never sa on it prior to purchasing it i was amazed at how good a package it is .

Keen to make it "mine" out came the exhaust baffles and next on the sights was the exhaust flapper valve , this was duly removed and replaced with a plain piece of stainless tube, 60.5 OD x 75mm long do not purchase the commercially available part that costs £35 ( $50) just go to your local exhaust specialist and purchase an off cut. Mine was free in fact .
Having already removed the flap valve on my hP2 Sport and a GS1200 I know that it does not make any massive improvement on performance however the exhaust "crackle" on over run is to die for especially if you keep throttle off the stop a bit so some fuel is being dragged in.
Performance wise it does remove the slight dip in power/TQ between 2600-4000 rpm .

No warning lights come on the connector to the motor is simply taped up and hidden out of sight .
Next is to get rid of the KAT, this I will do by fitting Akropovic headers feon an twin can 1200GS ( yes they fit I already tried the ones of my mates GS).

It is not about performance gain it is just the noise ....

Happy riding ...

Dave. :)
 

·
Registered
Joined
·
17 Posts
Discussion Starter #3 (Edited)
Hi Dna
Isn't it possible just to uncouple the cables which leaves the flap open.?
Cheers piston.
Hi,
I suppose yes it is however you are then left with the servo motor etc just hanging around , It takes literally ten minutes to remove the valve and replace it with the tube , it will take you longer to uncouple the cables ,you can alternatively just remove the connector from the unit it stays open all the time then , I did this on my HP2 as the valve was welded into the pipe an valve was open all the time , I later removed it by changing exhaust .
Removing the whole thing including motor , cleans up the bike a bit .

Sometimes less is more .
 

Attachments

·
Registered
Joined
·
182 Posts
When you say remove the whole thing including the motor, by motor I assume you mean what the microfiche calls the servo unit? The wire you zip tied to the frame was the electric cable that goes into the servo unit? I would also like to remove that bit of clutter.
 

·
Registered
Joined
·
17 Posts
Discussion Starter #11
When you say remove the whole thing including the motor, by motor I assume you mean what the microfiche calls the servo unit? The wire you zip tied to the frame was the electric cable that goes into the servo unit? I would also like to remove that bit of clutter.
Yes I removed the servo motor and valve , if you really need to remove the wire trace it back and cut it off , just insulate the bare ends , I personally just tucked it up out of the way, it really does not weigh that much ...:)
 

·
Registered
Joined
·
551 Posts
Next is to get rid of the KAT, this I will do by fitting Akropovic headers feon an twin can 1200GS ( yes they fit I already tried the ones of my mates GS).
Now this I´d like to see pics of!
 

·
Premium Member
Joined
·
1,689 Posts
Let mere be the first retard to ask this but...
Why is all this necessary?

I don't get it.
It's a personal choice thing ;) (removal)
It will make no difference to anything really apart from you may loose a very small amount of engine braking 1.3% as the valve won't be shutting to slow down exhaust gasses escaping ,but it doesn't close fully on throttle release ;)
If as and when the valve seizes through carbon build up just remove it then .
As stated its a noise retarder exhaust valve that's all and it's not a vital part ;)
 

·
Registered
Joined
·
1,039 Posts
I forgot about that first post.
Since I can hardly effing hear anyway from years of blasting music, less noise is my motto... not more ( except when it sounds sooooo good)...

:)
 

·
Registered
Joined
·
51 Posts
Exhaust valve removal

I thought I'd create a new thread for this since it didn't really fit under removing the baffles.

Is anyone who wants a throatier exhaust note considering removing the Butterfly valve? Unlike EXUP, the BMW version is apparently only there to quiet the bike at lower (read testing) speeds. Here's an online tutorial I ran across on how to do it: Removal of the exhaust control vavle

I love the stock sound but I want more! It's just too civil a note for the badass looks of the bike IMO...especially around here in the land of Harleys. So...a full de-cat'ing, de-exhaust valve'ing Remus system is on its way to me. A booster plug is included to help with the expected lean mixture issues. I'll post a before and after video if there's interest.

If anyone is considering an aftermarket Akrapovic can, their sales page might be of interest. I was surprised how similar the notes were and that the measured dB levels were identical.
 
1 - 20 of 520 Posts
Top