Dodging exhaust flap bullets!!
-
- Posts: 66
- Joined: Fri Oct 14, 2022 8:19 am
- Location: Aberdeenshire
- Bike Model and Year: R1250RT 2021
- Has liked: 25 times
- Been liked: 30 times
Re: Dodging exhaust flap bullets!!
It'd be interesting to keep an eye on that.
Thanks for your advice on the flap, etc.
Yes I watched that video among the many others!!
Thanks for your advice on the flap, etc.
Yes I watched that video among the many others!!
- Doctor T
- Posts: 1988
- Joined: Tue Dec 21, 2021 10:21 pm
- Location: west sussex
- Bike Model and Year: 2007 R1200RT SE
- Has liked: 1136 times
- Been liked: 304 times
Re: Dodging exhaust flap bullets!!
There is a realy easy anwser to the flap problem. Get a older bike
Trust me I am a retired Doctor and lecturer at Oxford University of Structural and Mechanical/Electrical engineering.
"Blessed are the cracked, for they shall let in the light". Groucho Marx
"Blessed are the cracked, for they shall let in the light". Groucho Marx
- David.
- Subscriber
- Posts: 8300
- Joined: Fri Nov 07, 2014 7:29 pm
- Location: North Yorkshire
- Bike Model and Year: R1200RT (Camhead) 2012
- Been liked: 387 times
Re: Dodging exhaust flap bullets!!
Agreed, the vintage ones are the best. My flap is still operational after 11 years and 43,000 miles. If it fails, it can be removed and a bobbin piece fitted.
-
- Posts: 379
- Joined: Sat Aug 04, 2018 11:43 am
- Location: UK
- Bike Model and Year: 2019 1250rtle
- Been liked: 20 times
Re: Dodging exhaust flap bullets!!
Has no one ever asked BMW why they cannot sort this out ? After it did not bother Yamaha .
- Stu
- Administrator
- Posts: 1584
- Joined: Wed Jun 02, 2021 9:13 pm
- Location: Hull, UK
- Bike Model and Year: 2016 R1200RT
- Has liked: 555 times
- Been liked: 512 times
Re: Dodging exhaust flap bullets!!
Oh it did!
They had the same issue of it seizing up as did other manufacturers who fitted them
Some got it better than others though
- David.
- Subscriber
- Posts: 8300
- Joined: Fri Nov 07, 2014 7:29 pm
- Location: North Yorkshire
- Bike Model and Year: R1200RT (Camhead) 2012
- Been liked: 387 times
Re: Dodging exhaust flap bullets!!
The difference between the vintage bikes and the modern ones is that the flap spindle was in the horizontal position, nows it's vertical. I wonder whether this is a contributory factor the the more recent failures.
- Doctor T
- Posts: 1988
- Joined: Tue Dec 21, 2021 10:21 pm
- Location: west sussex
- Bike Model and Year: 2007 R1200RT SE
- Has liked: 1136 times
- Been liked: 304 times
Re: Dodging exhaust flap bullets!!
Being vertical, i wonder if water is dripping in on the top ceasing the spindle. Whereas the older type, the water would run past the spindle
Trust me I am a retired Doctor and lecturer at Oxford University of Structural and Mechanical/Electrical engineering.
"Blessed are the cracked, for they shall let in the light". Groucho Marx
"Blessed are the cracked, for they shall let in the light". Groucho Marx
- David.
- Subscriber
- Posts: 8300
- Joined: Fri Nov 07, 2014 7:29 pm
- Location: North Yorkshire
- Bike Model and Year: R1200RT (Camhead) 2012
- Been liked: 387 times
Re: Dodging exhaust flap bullets!!
On the modern bikes, the bottom spindle bearing will also be contaminated internally with condensation from exhaust gases.
-
- Subscriber
- Posts: 1465
- Joined: Fri Sep 16, 2016 10:33 pm
- Location: Greater Manchester
- Bike Model and Year: RT 2011
- Has liked: 80 times
- Been liked: 144 times
Re: Dodging exhaust flap bullets!!
My vintage bike (2011) had had the flap removed when I bought the bike 7 years ago with 15k miles, I can only presume it had been removed due to failure.
The GS 'is' the better bike :-)
- David.
- Subscriber
- Posts: 8300
- Joined: Fri Nov 07, 2014 7:29 pm
- Location: North Yorkshire
- Bike Model and Year: R1200RT (Camhead) 2012
- Been liked: 387 times
Re: Dodging exhaust flap bullets!!
If Highland Rider is correct, Yamaha ditched the Exup valve and both Ducati & KTM have experienced the same problems as BMW.
- exportman
- Posts: 306
- Joined: Tue Sep 27, 2016 7:57 pm
- Bike Model and Year: R1250RT 2023
- Has liked: 9 times
- Been liked: 45 times
Re: Dodging exhaust flap bullets!!
On my 2016 bike I had the valve replace within 12 months under warranty the valve went again about 18 months later I just ignored it. The valve both times stuck fully open so the only issue was a little extra noise at low speed, I saw no discernible difference in performance. On the 2016 model it did not add any warning lights
I wonder why BMW and the other manufacturers have not made this a separate section of the exhaust, a replaceable part that must cost considerably less than replacing the whole header for them to replace.
I now have the 2023 with TFT so I I guess I will get the engine management light if it stick, Once its out of warranty and BMW won't replace it FOC I will just buy an eliminator. It should not impact the insurance as it not going to increase the performance of the machine.
I wonder why BMW and the other manufacturers have not made this a separate section of the exhaust, a replaceable part that must cost considerably less than replacing the whole header for them to replace.
I now have the 2023 with TFT so I I guess I will get the engine management light if it stick, Once its out of warranty and BMW won't replace it FOC I will just buy an eliminator. It should not impact the insurance as it not going to increase the performance of the machine.
- David.
- Subscriber
- Posts: 8300
- Joined: Fri Nov 07, 2014 7:29 pm
- Location: North Yorkshire
- Bike Model and Year: R1200RT (Camhead) 2012
- Been liked: 387 times
Re: Dodging exhaust flap bullets!!
On a Camhead, the flap is a separate section which can be replaced but that's old fashioned.
- Stu
- Administrator
- Posts: 1584
- Joined: Wed Jun 02, 2021 9:13 pm
- Location: Hull, UK
- Bike Model and Year: 2016 R1200RT
- Has liked: 555 times
- Been liked: 512 times
Re: Dodging exhaust flap bullets!!
@exportman Thats right, On the 1200 it brings up no warning light but stores an error code in the ECU
The 1250 brings up a warning light and as such maywell fail an MOT
I agree it would have been so much easier for them to make it an addon rather than build it in! I wonder if a change in legislation dictates that it has to be built in and not removable.
The 1250 brings up a warning light and as such maywell fail an MOT
I agree it would have been so much easier for them to make it an addon rather than build it in! I wonder if a change in legislation dictates that it has to be built in and not removable.