Removing airfeed pipes to throttle bodys

Santa-2512

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Anyon know how to get the big plastic pipes off the back of the throttle bodys?

Ive been asked to check the butterflys are comming to rest in the same position -

Prior to getting someone to look at it

they use some specialist crimp thing from what i can see
 
I ground an old pair of side cutting pliers so that they have a little tooth top and bottom at the end.
They make it very easy to remove and refit the stainless steel bands.
There is no doubt a proper tool but it made use of an otherwise worn out scrap pair of side cutters.
 
Just make sure both bodies are closing onto the factory set stop screws. Unless you think they've been interfered with. The are sealed with a dab of blue paint usually. Do not twiddle.
 
Check a stop screw position then open it one 1/2 turn. If throttle balance is affected, it’s closing properly. Put back as was and repeat the other side.

If main throttles are balanced and tickover is lumpy, you may have a sticking idle stepper motor.
 
The ones on my bike are Oetiker low profile clamps and there are special pliers for applying and releasing them but I think you can release them with needle nose pliers. It's tension that keeps them tight, you have to squeeze two of the raised ribs together and then lift part of the clamp over the locking tab to release them. It'easier once you see how they work but basically they're a pain in the arse and you'll probably destroy them getting them off. Nothing is straightforward. :thumby:
 
TBH, the way i feel about the bike at the moment, its the last of my prioritys lol

once on the the way to work, and 3 times on the way home it cut out.

its like jeckyl & hide, one minute its running fine, then it just goes lumpy and misses then dies, restart it and all is fine untill its next hissy fit.

Tonight it decided it wasnt going to run on closed throttle full stop, so i had to blip the throttle constantly.

Changing down coming up to a roundabout it decided to stop, restarting without stopping was interesting lol, that made the starter work !! Then wouldnt pull cleanly below 4k

gave it some beans an opened the thhrottle to clear it, and its like a switch nothing below 4k then bang full chat over 4k.

get home, hand of the throttle and it dies.

Tempted to let the fecker rot in the back garden. :(

GS911, waste of time shows nothing, every component running as it should.

I'd part ex it in an instance if i could. trouble is its worth feck all as non / poor runner.

Got someone going to have a look, but they cant do it for another 2 weeks !!!
 
What else have you investigated? TPS, coil sticks, stepper motors. Lots of things check before kicking the crap out of it. GS911 won't show a fault for failing coils.
 
What else have you investigated? TPS, coil sticks, stepper motors. Lots of things check before kicking the crap out of it. GS911 won't show a fault for failing coils.

TPS & steppers show no faults i can discern via GS9,

Coils I believe its a matter of substitution, to check / find faults.

So i could spunk £350 to find there ok !
 
TPS problems don't always show on a Gs911 - testing the coils is a simple 5 minute job - do a search..... Also have you tried resetting all adaptations ? Obviously try one thing at time.
 
It does sound like an intermitent fault on the TPS.
I had similar problems on a Yamaha FJR which was replaced under recall by manufacturer.
 
TBH, the way i feel about the bike at the moment, its the last of my prioritys lol

once on the the way to work, and 3 times on the way home it cut out.

its like jeckyl & hide, one minute its running fine, then it just goes lumpy and misses then dies, restart it and all is fine untill its next hissy fit.

Tonight it decided it wasnt going to run on closed throttle full stop, so i had to blip the throttle constantly.

Changing down coming up to a roundabout it decided to stop, restarting without stopping was interesting lol, that made the starter work !! Then wouldnt pull cleanly below 4k

gave it some beans an opened the thhrottle to clear it, and its like a switch nothing below 4k then bang full chat over 4k.

get home, hand of the throttle and it dies.

Tempted to let the fecker rot in the back garden. :(

GS911, waste of time shows nothing, every component running as it should.

I'd part ex it in an instance if i could. trouble is its worth feck all as non / poor runner.

Got someone going to have a look, but they cant do it for another 2 weeks !!!

The bike doesn't hate you, it's just a machine, think about how good you'll feel once you've solved the problem and the bike soars like it was built to and you can tell us all how you did it. Or pour petrol over it and set fire to it.
 
Mine was stalling intermittently. Once in a mid right-turn during rush hour it just switched off and caused the bike to crash down on the low side while half way across the road. I would have walked away and left the bar steward to the vultures but I was 100 miles from home. A bus driver stopped traffic while I struggled to pick the bastard up.

The problem was primary coils. Both were failing so swapping left/right did not help with testing. They get worse when hot. The best test would have been to unplug the trigger leads to both secondaries as that would properly expose what was going on.
 
When it stops raining, and i can get to the bike i'm going to pull the coils, and test them,

I think ive found the relative data as to what the resistances should be ...

we will go forward from there :)
 
Well,

Went out today, and reset all adaptions,

tommorow i'll do the work run, and see what happens

I must be blind, and thick, as i couldnt find the thread detailing the 5 minute test of

the coils, despite searching.
 
Disconnect the coil power leads on both secondary coils.
Disconnect the coil power lead on one primary coil. Does engine run worse or the same.
Replace connector and repeat on other primary coil. The side which makes no difference with unplugged coil has a weak or non existent spark.

However when both are failing intermittently (as mine were) this won’t tell you much.

As the problem happens with hot engine borrow some known good coils and see if the stalling problem clears up.
 
Why is it when you want to try somthing like this, it starts to rain!

Ok both secondarys disconnected -

bike started and ran fine, did a mile and turned off, to store the gear adapations.

Restarted and carried on ...

Once warm you could tell it was missing , kept the revs up, and came round the roundabout at the end of my run, pulled into

the first layby, took my hand of the throttle and it stopped.


nursed it home, let the revs drop to idle and it dies

so once on the hardstanding i connected the LH secondary ... started it, and again it just dies.

Disconnected the LH secondary, and connected the RH secondary started it, and again it dies

Reconnected all and went for a coffee

Jut been out and started it, very lumpy/ hunting type run but running,

Disconnected the LH primary, you could hear the revs drop but nothing dramatic, and it stayed running

Disconnected the RH primary, again you could hear the revs drop, but kept running, although

noticably smoother with the primary connected ...

So still stumped
 
Not quite sure what you’ve tested.
Have you run it with both secondary coils unplugged got it fully hot and then done the primary tests?

However mine with secondary coils running would drop the revs slightly whichever primary was disconnected it turned out that both primary coils were failing.
What’s the chance of that? They often fail in pairs according to BMW dealer.
Mine actually smelled burnt. Not knowing how they are supposed to smell I carried on. They new ones have done 25K no funny smells.
 


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