1199 Exhaust valve question

castle1911 · May 1, 2012

Rode about 100 miles on my 1199s this past Sunday and had a curious thing happen. At three or four random times during my rides, I lost the beautiful exhaust sound. Happened at random times too. Once during acceleration from about 40 miles per hour, another as I was coasting in 2nd gear. Was really strange, one minute as loud as loud can be, next, not a peep. I mean nothing. One time I was at about 60 miles an hour on the highway at a fairly stable speed. My guess is everything is just working its way in and something was just stuck, but was wondering if anyone else expereinced this.

leebeeone · May 1, 2012

castle1911 said:
Rode about 100 miles on my 1199s this past Sunday and had a curious thing happen. At three or four random times during my rides, I lost the beautiful exhaust sound. Happened at random times too. Once during acceleration from about 40 miles per hour, another as I was coasting in 2nd gear. Was really strange, one minute as loud as loud can be, next, not a peep. I mean nothing. One time I was at about 60 miles an hour on the highway at a fairly stable speed. My guess is everything is just working its way in and something was just stuck, but was wondering if anyone else expereinced this.

Yes I had the same thing, very radomly and when it is quiet and you suddenly open the throttle there is a very slight delay in pickup, I am guessing that it a fuelling issue? may itsto try and keep the consumption lower! it has never happened to me while accelerating has it with you?

castle1911 · May 1, 2012

leebeeone said:
Yes I had the same thing, very radomly and when it is quiet and you suddenly open the throttle there is a very slight delay in pickup, I am guessing that it a fuelling issue? may itsto try and keep the consumption lower! it has never happened to me while accelerating has it with you?

Nope - not during acceleration. Only when consistent speed or closed throttle. Comes back to normal when I open the throttle back up. It is freakishly quiet when it does it too.

leebeeone · May 1, 2012

castle1911 said:
Nope - not during acceleration. Only when consistent speed or closed throttle. Comes back to normal when I open the throttle back up. It is freakishly quiet when it does it too.

yeah its weird

tstephenson · May 1, 2012

Do any of you have the Termi slip on or full exhaust?

leebeeone · May 1, 2012

tstephenson said:
Do any of you have the Termi slip on or full exhaust?

no stock

tstephenson · May 1, 2012

OK that would make sense since the exhaust valve is removed for both slip ons and full term systems. Not sure what triggers the exhaust valve open and close

bolds · May 1, 2012

castle1911 said:
Rode about 100 miles on my 1199s this past Sunday and had a curious thing happen. At three or four random times during my rides, I lost the beautiful exhaust sound. Happened at random times too. Once during acceleration from about 40 miles per hour, another as I was coasting in 2nd gear. Was really strange, one minute as loud as loud can be, next, not a peep. I mean nothing. One time I was at about 60 miles an hour on the highway at a fairly stable speed. My guess is everything is just working its way in and something was just stuck, but was wondering if anyone else expereinced this.

the valve shuts at rpm between 2900 and 3000 whatever speed you are doing

karrl · May 1, 2012

same for me with termis!

castle1911 · May 1, 2012

bolds said:
the valve shuts at rpm between 2900 and 3000 whatever speed you are doing

Only thing is it has only done this a small handful of times at seemingly random RPM's. It doesn't go quiet all the time.

Desmo Dave · May 1, 2012

tstephenson said:
OK that would make sense since the exhaust valve is removed for both slip ons and full term systems. Not sure what triggers the exhaust valve open and close

I think you`ll find the slip ons retain the valve.In the box is a Y piece that connects to the value to increase the pipe diameter to the cans.

bolds · May 1, 2012

castle1911 said:
Only thing is it has only done this a small handful of times at seemingly random RPM's. It doesn't go quiet all the time.

It's really hard to get the right revs to get it to close when you are riding
Just have a go and you will see

bolds · May 1, 2012

Desmo Dave said:
I think you`ll find the slip ons retain the valve.In the box is a Y piece that connects to the value to increase the pipe diameter to the cans.

Tricolore doesn't retain the valve with the slip ons supplied with bike

Xbox · May 1, 2012

bolds said:
Tricolore doesn't retain the valve with the slip ons supplied with bike

Well "technically" the valve is still there .... just the actuating motor and cables are junked

Quinten · May 2, 2012

Xbox you have the sllip-on of full system>?

what did you or the dealer do to the valve?

Xbox · May 2, 2012

Quinten said:
Xbox you have the sllip-on of full system>?

what did you or the dealer do to the valve?

I have the slip-ons that come with the Tric.

A butterfly is built into the exhaust manifold, just above the connection point you see in the pic.

As you can also see, other redundant items:

1) Black box houses the actuator motor, located above the engine fan that sits in the belly pan.

2) Cable is the operating cable.

Butterfly is spring loaded, so now permanently sits wide open.

Make sense?

Quinten · May 2, 2012

yes make's sence

and how does you bike perform now? more power i assume?

on Dynotest it showed wit slip on 186Bhp..

but what are your findings?

Xbox · May 2, 2012

Quinten said:
yes make's sence

and how does you bike perform now? more power i assume?

on Dynotest it showed wit slip on 186Bhp..

but what are your findings?

Its a bit more lumpy down low to be honest and has probably moved some of the power & torque up the rev range.

Not ideal for running-in rpm in hindsight, but it does sound nice

Would love to see some dyno charts if you know of any, before and after slip-ons!

Quinten · May 2, 2012

i will let you know if i find any charts.

but you are still running in ?
if correct you should have more power.. let's hope so

haha.

i have only heard the sound of the bike with stock pipes ( wich was pretty damn loud for stock)

can't wait for mine with the termi's as wel.

have you also changed the mapping for the termi's?

Wallaroo · May 2, 2012

Jeff Nash at Advanced Motorsports in Texas did a stock bike with 70mm headers and termis and got 185.

Fasers here in Aust did a S with the full superstock system and got 192.

My headers have just arrived and there is no valve. They are now off to get Ceramic coated, which I understand when fitted I could possibly get close to the 190.

1199 Exhaust valve question

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