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My Bimsey Has a Cold...


Rubdiver2

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Rubdiver2

So here we go again!

 

Having just fitted a new grip with all the bells and whistles onto the left handlebar, just to have it replaced as the heater was not working, I drove off to work. The bike finally working 100 percent. Or so I thought. Arriving at the airport in order to go offshore for a couple of weeks, I noticed while parking the bike that it was running very unevenly in idle. Going up and down in revolutions about every second. The bike had during the 100 mile drive not shown any signs of any misbehaviour, no lights showing in the display. While on the platform, I researched a bit and hoped that a reset of the Motronic unit could solve the problem.

 

Arriving back at the airport on a late, cold winters night (as it turned out to have become in the meantime) I fired up the bike and as expected, it was running poorly, just managed to get it going when adding some throttle to it, I was forced to drive home as it was. It ran, it was very responsive although adding throttle felt jagged but not an issue to keep going on the freeway at 80. I quickly noticed, that gasconsumption was way up and had to refuel very quickly. I got back to safe harbour but with at least double the gas used. The exhaust was not unexpectedly burning hot and glowing on the inside and layered with black soot at the end of it. So I just pray there has been no further damage.

 

I did a reset of the Motronic yesterday but to no avail, it runs just as unevenly (but runs). I changed spark plugs last year and has had no issue with it. I am now stuck at my moms house in Denmark (always stopping here on my way home to Sweden or to the airport for work)  without proper tools. The always helpful, local mechanic (former BMW biker) unfortunately has no time, so might have to drive the 190 miles to my normal mechanic over in Sweden in the state that it is in (think going from San José via the Golden Gate and Richmond Bridge in order to get to Berkeley but double the distance and five times the price to go over each bridge).

 

So my questions are:

 

Is there something I can do here in order to track down the main issue? My hunch is that it has to due with evap/throttle body issue but of course it can be something else. The bike was parked with half a tank for two weeks but before that has been parked for longer with full tank.

 

Could I drive it to my mechanic without causing more damage?

 

Best wishes to all,

 

Felix

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dirtrider
1 hour ago, Rubdiver2 said:

So here we go again!

 

Having just fitted a new grip with all the bells and whistles onto the left handlebar, just to have it replaced as the heater was not working, I drove off to work. The bike finally working 100 percent. Or so I thought. Arriving at the airport in order to go offshore for a couple of weeks, I noticed while parking the bike that it was running very unevenly in idle. Going up and down in revolutions about every second. The bike had during the 100 mile drive not shown any signs of any misbehaviour, no lights showing in the display. While on the platform, I researched a bit and hoped that a reset of the Motronic unit could solve the problem.

 

Arriving back at the airport on a late, cold winters night (as it turned out to have become in the meantime) I fired up the bike and as expected, it was running poorly, just managed to get it going when adding some throttle to it, I was forced to drive home as it was. It ran, it was very responsive although adding throttle felt jagged but not an issue to keep going on the freeway at 80. I quickly noticed, that gasconsumption was way up and had to refuel very quickly. I got back to safe harbour but with at least double the gas used. The exhaust was not unexpectedly burning hot and glowing on the inside and layered with black soot at the end of it. So I just pray there has been no further damage.

 

I did a reset of the Motronic yesterday but to no avail, it runs just as unevenly (but runs). I changed spark plugs last year and has had no issue with it. I am now stuck at my moms house in Denmark (always stopping here on my way home to Sweden or to the airport for work)  without proper tools. The always helpful, local mechanic (former BMW biker) unfortunately has no time, so might have to drive the 190 miles to my normal mechanic over in Sweden in the state that it is in (think going from San José via the Golden Gate and Richmond Bridge in order to get to Berkeley but double the distance and five times the price to go over each bridge).

 

So my questions are:

 

Is there something I can do here in order to track down the main issue? My hunch is that it has to due with evap/throttle body issue but of course it can be something else. The bike was parked with half a tank for two weeks but before that has been parked for longer with full tank.

 

Could I drive it to my mechanic without causing more damage?

 

Best wishes to all,

 

Felix

Morning  Felix

 

First off to give you specific advice we need to know exactly what BMW you are working with.

 

Once we know for sure what motorcycle (year & model)  then we can make more informed suggestions.  

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dirtrider
32 minutes ago, Rubdiver2 said:

My bad, my bike is a 1200 RT 2010 camhead model authority version (RT-P)

Afternoon Felix

 

It could be as easy as a stick coil that is not working correctly, or possibly water in the gasoline, or possibly a cracked plastic throttle body cam, or a valve issue, or???

 

Not enough information to tell you much without some more information, testing, and/or guessing.  

 

As far as riding to a mechanic?-- That depends of IF the exhaust system is not overheating, it will stay running, & it is ridable without a big problem. 

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Rubdiver2

So I have pretty much given up doing any work on the RT now.

 

I am standing outside in freezing temperatures and rain on gravel, managed to get right and left upper stick coil out and measure them with dad's very old multimeter from sometime in the 70´s. The coils both read 3 Ohm, a couple of Ohms too much, I believe, but at least they do it in unison! I will go and buy a new multimeter and see if it is still the same.

 

On the right side their is quite a bit of grey "fluff" sitting around the edges of the valve cover, perhaps from all the extra burnt gasoline? Hm.

 

I cannot measure the bottom sticks without having to take off bars and panels it seems, which is just not realistic in the mud as well as taking too much time as I need to be going home by tomorrow, with or without the bike. Looks like without.

 

Spoke to another, local motorcycle mechanic, who would not recommend riding the bike home as all the extra gasoline would "wash" the engine (his word) and perhaps cause irreparable damage to the engine.

 

So am thinking I will cover up the bike and leave the it here for the winter or until I can find a place to repair it. I will travel directly to the workshop in Sweden tomorrow morning and get their advice but also testride and perhaps buy that ´09 LT with only 28.500 miles on it that has been tickling my fancy for some months, so this might just be a good excuse! Ha! I know, I know, a boring K-model but the lower geared RT-P is less suitable for the longer trips around Europe. And I love and miss the old, logical, quality buttons and the cockpit of the LT is just beautiful and organic.

 

So problem solved for now.

 

Felix

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dirtrider
50 minutes ago, Rubdiver2 said:

So I have pretty much given up doing any work on the RT now.

 

I am standing outside in freezing temperatures and rain on gravel, managed to get right and left upper stick coil out and measure them with dad's very old multimeter from sometime in the 70´s. The coils both read 3 Ohm, a couple of Ohms too much, I believe, but at least they do it in unison! I will go and buy a new multimeter and see if it is still the same.

 

On the right side their is quite a bit of grey "fluff" sitting around the edges of the valve cover, perhaps from all the extra burnt gasoline? Hm.

 

I cannot measure the bottom sticks without having to take off bars and panels it seems, which is just not realistic in the mud as well as taking too much time as I need to be going home by tomorrow, with or without the bike. Looks like without.

 

Spoke to another, local motorcycle mechanic, who would not recommend riding the bike home as all the extra gasoline would "wash" the engine (his word) and perhaps cause irreparable damage to the engine.

 

So am thinking I will cover up the bike and leave the it here for the winter or until I can find a place to repair it. I will travel directly to the workshop in Sweden tomorrow morning and get their advice but also testride and perhaps buy that ´09 LT with only 28.500 miles on it that has been tickling my fancy for some months, so this might just be a good excuse! Ha! I know, I know, a boring K-model but the lower geared RT-P is less suitable for the longer trips around Europe. And I love and miss the old, logical, quality buttons and the cockpit of the LT is just beautiful and organic.

 

So problem solved for now.

 

Felix

Morning   Felix

 

Trying to measure those stick coils for resistance is about impossible. All you can really measure is the primary side & that side almost never in the cause of the issue. 

 

The secondary is isolated so really no good way to measure resistance on that side but even if you could the the usual problem is internal arcing to the RFI shield & THAT can't be measured with an ohmmeter. 

 

Swapping in KNOW GOOD stick coils is the best way but you can try running it on JUST the upper coils, then on JUST  the lower coils, as a somewhat test. 

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