oddshapedballs
Registered user
When I turn on my ignition the flappy exhaust valve squeaks as it sets up, is there anyway of lubing it? I've tried taking the end can off and spraying it with wd40 which only works until it burns off.
Flappy sqeak
- Thread starter oddshapedballs
- Start date
Hector
Registered user
Flappy thingy
Not sure what you can do about a squeak. However, my 2011 GSA has just had it's 3 year service and my flap has ceased in the open position, I thought my bike was making a bit more noise that normal.
Good news, those kind people at BMW have agreed to replace free of charge as a good will guesture, full cost to replace around £300.00 - the part is £270.00 alone.
If there is a way to keep it lubricated I'd like to know to prevent it ceasing again, as I don't think BMW will replace another one.
I was lucky it ceased in the open position!
Not sure what you can do about a squeak. However, my 2011 GSA has just had it's 3 year service and my flap has ceased in the open position, I thought my bike was making a bit more noise that normal.
Good news, those kind people at BMW have agreed to replace free of charge as a good will guesture, full cost to replace around £300.00 - the part is £270.00 alone.
If there is a way to keep it lubricated I'd like to know to prevent it ceasing again, as I don't think BMW will replace another one.
I was lucky it ceased in the open position!
Bendy toy
Registered user
The valve does nothing for performance and simply quietens the exhaust noise at low speeds. It's not offensive anyway so what's the point.
You now have a good new valve so take the whole lot off including the motor and cables and fit a short joining pipe into the gap. This will keep everything as new. The noise isn't excessive.
They can all go back on again if you later PX the bike to BMW.
If you use the new valve, it will seize up again. The heat stops any lubricant being effective and road debris, spray, etc will do the rest.
Sent from my phone with mangled spelling
You now have a good new valve so take the whole lot off including the motor and cables and fit a short joining pipe into the gap. This will keep everything as new. The noise isn't excessive.
They can all go back on again if you later PX the bike to BMW.
If you use the new valve, it will seize up again. The heat stops any lubricant being effective and road debris, spray, etc will do the rest.
Sent from my phone with mangled spelling
i beg to differ on the point of"it will seize up againg anyway",i have had 4 twincams and covered thousands of miles and ridden all winters with them and never had one seize up
Mr K
Registered user
Maintenance appears to be a lost art.
oddshapedballs
Registered user
I did think of opening the flap manually then disconnecting the cables from the servo and cable tie them somewhere so it's always stuck in the open position. I did get a replacement tube but at the required 63.5mm OD it's too big, unless I can source one a little smaller I'll disconnect the fucking thing and be done with it!
you dont need to cable tie anything its resting place is open
...but when you turn on the ignition, the ECU opens and shuts the valve. if it's stuck, it may strain the servo 
i'd just disconnect them. maybe unplug the servo.
i'd just disconnect them. maybe unplug the servo.
Bendy toy
Registered user
Someone was selling suitable tubes on here a few weeks back.
Sent from my phone with mangled spelling
Sent from my phone with mangled spelling
oddshapedballs
Registered user
I'll disconnect the cables from inside the servo and leave the servo plugged in so the ECU thinks the servo's doing it's job, but there's nothing pulling or pushing on the exhaust flap.
If there's room inside the servo to leave them in there without fouling anything I'll do so, if not I'll put the cover back on and tie the cable nipples elsewhere.
If there's room inside the servo to leave them in there without fouling anything I'll do so, if not I'll put the cover back on and tie the cable nipples elsewhere.
oddshapedballs
Registered user
Got one, it doesn't fit.
Mr K
Registered user
Plusgas on the external mech's overnight.... then WD 40 or similar...then copper/ali/silicon type grease spray?
Then there must be a manufacturing fault. Mine was replaced under goodwill, 18 months ago. The replacement is now whining. Which would make it 3 failures in 4 years.
i beg to differ on the point of"it will seize up againg anyway",i have had 4 twincams and covered thousands of miles and ridden all winters with them and never had one seize up
Gossy
Registered user
Gordon T
Boxerfan
Registered user
I've got one of these tubes from Gordon T, and coincidentally I fitted it this afternoon. Initially I didn't think it would fit but with a dab of copper grease and lining it up correctly it just slotted in. 15 mins work and it looks really neat.
AberdeenAngus
Registered user
High temperature grease.
Boxerfan
Registered user
It did say protects against seizing up and suitable for extreme heat. I'm hoping with my limited knowledge that's ok?
Bendy toy
Registered user
The issue is getting grease into the bearings "grease" and "nipples" are dirty words these days.
When the servo is removed the ECU will log a fault but there will be no warning lamps on the dash. The log entry goes away when servo reconnected.
Sent from my phone with mangled spelling
When the servo is removed the ECU will log a fault but there will be no warning lamps on the dash. The log entry goes away when servo reconnected.
Sent from my phone with mangled spelling
...but when you turn on the ignition, the ECU opens and shuts the valve. if it's stuck, it may strain the servo
i'd just disconnect them. maybe unplug the servo.
yes sorry assumed cables would be disconected,plus unplug the connector,no malfunction lamp will show the fault will only show with diagnostic gear gs911 etc
Roymondo
Registered user
It's easy to remove the cables but leave the valve itself and servo in situ (to keep the ECU happy). The valve will naturally fail in the Open position due to the return spring. Dry graphite powder used to be the lubricant of choice for Yamaha Exup valves, which are similar in operation. Haven't tried it with mine yet (currently on replacement No 4 from BMW).
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