Pop on the overrun

MATKAT said:
How nice to have Mr Cookie here with a 1200 :D

:o



it's in for first service on friday, so it's someone else's problem. bollox to it :D
 
whitegloss said:
the standard sewing machine "noise" (may not meet the oxford concise dictionary meaning) is an emarassment to the two wheeled variety of transport-do yourselves a favour and ditch the standard can and fit a remus system, sounds bloody lovely-especially when it pops and bangs on the over run-the more leaks the better :clap


Well actualy in general, backfiring on deceleration (as opposed to acceleration) is generally caused by a lean condition in the fuel circuit. What happens is that the mixture leans out enough to where is fails to ignite consistently. This, in turn allows some un-burnt fuel to get into the exhaust pipes. Then when the engine does fire, these un-burnt gasses are ignited in the exhaust pipe and slippers, causing the backfire. Aftermarket pipes :rob and slippers often increase backfiring, probably because they may the bike run leaner.
 
Pipen said:
Well actualy in general, backfiring on deceleration (as opposed to acceleration) is generally caused by a lean condition in the fuel circuit. What happens is that the mixture leans out enough to where is fails to ignite consistently. This, in turn allows some un-burnt fuel to get into the exhaust pipes. Then when the engine does fire, these un-burnt gasses are ignited in the exhaust pipe and slippers, causing the backfire. Aftermarket pipes :rob and slippers often increase backfiring, probably because they may the bike run leaner.

Oi Mr pipen get off the bloody forum idle chat and give the wife a hand with the decorating :nono while i pour myself another gloass of pop :beer:
 
whitegloss said:
STUFF THE FUELLING GET SUM NOIZE!!! :cool:



I have listened to my 12 accelerating and decelorating, and I think it actually makes enough noise, quiet fruity actually. This coming from a person who had a full Remus Grand Prix, on his 1100, and a Remus Titanium on his 1150 Adv.
 
06 ones souns different to 04 ones too. 06 fruity and poppop on the overrun. Not noisy enough to be antisocial, but just enough to make me grin...
 
marcus said:
06 ones souns different to 04 ones too. 06 fruity and poppop on the overrun. Not noisy enough to be antisocial, but just enough to make me grin...


just dropped mine off for it's first service (800 miles).

spoke to the service manager about this and he says it may improve after valves/balancing done. not holding my breath.

more interestingly, he told me that the design of the silencer has changed. early 12s had a valve in the can that prevented popping on the overrun, but this has been removed on the later models which are more prone to this issue.

they also sound different.
 
It`s all part of the joy of the boxer. My old 1150GSA with a Y piece and Remus sounded brilliant with th epopping and as soon as I have enough pennies in the jar, as nice system for the 1200GSA will be on and poppin` like Mary :D

I also have a R1100S Boxer Cup with the full Laser deeptone system and that is incredible on the overrun. In fact, if you throttle back very gently from around 6000 rpm it does it on command and I sit there hoping there is 3 feet of flame licking out :D

Yeah, sad I know but don`t you just love that motor?

:thumb
 
i just can't believe so many people find that popping desirable :loopy

me out of step again :confused:
 
I just can't believe.................................

cookie said:
i just can't believe so many people find that popping desirable :loopy

............................that people don't want that lovely popping on the overrun. Its wonderful :D :D
 
cookie said:
just dropped mine off for it's first service (800 miles).

spoke to the service manager about this and he says it may improve after valves/balancing done. not holding my breath.

more interestingly, he told me that the design of the silencer has changed. early 12s had a valve in the can that prevented popping on the overrun, but this has been removed on the later models which are more prone to this issue.

they also sound different.

Valve in the can
Do you mean this one ?
:D
 
cookie said:
i just can't believe so many people find that popping desirable :

It's utterly addictive... I find myself trying to induce it by building up a bit of pace, then rolling off & feathering the throttle. This on a standard 12GS. I've never "canned" any bike I've owned (Bandit included) but I'm sooooo tempted to can the 12. There's a bridge up the road from me with high stone walls each side on the downhill approaches & it sounds magic to roll off the 12 through there. The GS is turning me into a hooligan :D

CQH

...did someone say Remus??
 
As my R90/6 used to do this as it aged, I found that making sure that you are closing the throttle all the way while de-accelerating (such as when coming to a stop) tends to eliminate a lot of this. I found that I had developed a bad habit of leaving the throttle open just a bit...enough to leak unburnt fuel into the exhaust system- :beer:
 
BMW Akra Can on Remus pipes, more pops than a box of rice crispies, lovely!
It'll make your ears bleed :D
 
JDH said:
BMW Akra Can on Remus pipes, more pops than a box of rice crispies, lovely!
It'll make your ears bleed :D

Same combination and interesting results with the Wunderlich Power Commander, reduces but not eliminates popping and stops your breathing when the revs rise. :D
 
mmmm...popping

My 1200adv popps for fun and it sounds soooo good, but is it linked to bad vibes in any way?
I suffer from bad bar vibes at 80-90 causing numbness in my pinkies, so could the popping be bad fuel mix, unbalanced carbs...?
 
bmconvert said:
My 1200adv popps for fun and it sounds soooo good, but is it linked to bad vibes in any way?
I suffer from bad bar vibes at 80-90 causing numbness in my pinkies, so could the popping be bad fuel mix, unbalanced carbs...?

Odd you should say that... My 1200GS vibes at that speed too (so they tell me, officer) but the vibes are getting better as the bike is getting more miles up - it's now much smoother than it was.
 


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