04 R1150R Idle wavers
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MoonBeemer
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04 R1150R Idle wavers
My R1150Rs idle will not remain stable. It moves up and down about 2 or 3 hundred rpm. Is this a dirty throttle body? Thanks Roger
2004 R1150R
Re: 04 R1150R Idle wavers
First thing to do is make sure the Throttle Body Intakes are balanced with a suitable vacuum device. Then move on from there if that doesn't fix it.
Re: 04 R1150R Idle wavers
Fluctuating up and down like that means you probably have an air leak somewhere. Possibly around the o-ring sealing the TB intake from the air box...but it could be a number of things.
Re: 04 R1150R Idle wavers
I agree with the possible air leak, but I'll suggest two things to look at that may be helpful.
Check the rubber or plastic caps on the balance ports under the TBs. They often get old and split.
Also give the TB area around the seals a light spray of WD40 or similar while the engine is ticking over. It won't hurt anything and can sometimes give you an indication of where the problem is as it gets sucked into the intake via a leaking seal. If it is a 'loose' TB clamp, you may get away with just tightening it up. If you need to check the O-ring, judicious use of an assemply grease like Lubriplate 105 will assist in feeding the old O-ring back into it's groove without damage, using a blunt seal pick. You don't always have to replace the O-rings, particularly if the dealer is a long way from you.
Other than that, a significant TB imbalance also seems to make mine 'hunt' a little. At least it did until I did a very precise valve job and ran my Twinmax over the TBs. You could also check the Bleed Air Screws and see if they are a long way apart in turns out. That is often a sign that the last person to balance the TBs took a short-cut and only adjusted one side. Any more than a turn different can be a problem, but not always.
Good luck in the hunt, but the variation you have seems more like an air leak than anything else. Unless the Motronic is playing up (unlikely).
Check the rubber or plastic caps on the balance ports under the TBs. They often get old and split.
Also give the TB area around the seals a light spray of WD40 or similar while the engine is ticking over. It won't hurt anything and can sometimes give you an indication of where the problem is as it gets sucked into the intake via a leaking seal. If it is a 'loose' TB clamp, you may get away with just tightening it up. If you need to check the O-ring, judicious use of an assemply grease like Lubriplate 105 will assist in feeding the old O-ring back into it's groove without damage, using a blunt seal pick. You don't always have to replace the O-rings, particularly if the dealer is a long way from you.
Other than that, a significant TB imbalance also seems to make mine 'hunt' a little. At least it did until I did a very precise valve job and ran my Twinmax over the TBs. You could also check the Bleed Air Screws and see if they are a long way apart in turns out. That is often a sign that the last person to balance the TBs took a short-cut and only adjusted one side. Any more than a turn different can be a problem, but not always.
Good luck in the hunt, but the variation you have seems more like an air leak than anything else. Unless the Motronic is playing up (unlikely).
I ride an R1150GS Adventure with sidecar. IBA #39193