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Would you like to be part of the Valley BMW Riders family?

Please visit our membership information page (link down below).

Any further questions, please contact our treasurer Tom Maxted.

 

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- Partly Dave´s - Dave Friedman is a long standing member of our club with an extensive and thorough knowledge of BMW motorcycles. Dave will be offering "Specials" to the club members, so check back here frequently 'cause if you snooze you may looze out.
- Bentley - The Okanagan´s Premiere Destination Motorcycle Dealership. Visit Bentley Motorrad in Kelowna for great offers and deals.
- The Hitching Post Restaurant - We have been serving the Similkameen community since July 2004. Specialized in homemade food with fresh ingredients, and our staff offers quality and reliable service you can count on.
- Midway campground - Welcome to the Midway Riverfront Park. Enjoy camping right beside the river in downtown Midway.
- Dogsear - Canada's No. 1 imprintable activewear store for almost 40 years.
- Betta services - We can save you time and money whether it is for the shipping or receiving of your packages or by providing you with affordable faxing services or mailbox pickup service.
For years now, most BMW motorcycles have been fitted with an oxygen sensor (or often two in the case of boxer twins). Most owners have only a general idea that the oxygen sensor is somehow involved with emissions control, but beyond that, its purpose is a bit of a mystery. I’ll try to make this less of a mystery. But before discussing the oxygen sensor itself, it is helpful to understand why it’s needed in the first place, so bear with me …it might even be interesting! There are three types of exhaust pollutants: Unburned hydrocarbons (“HC”), Carbon Monoxide (“CO”) and Nitrogen Oxides (“NOx”). BMW was the first motorcycle manufacturer to adopt the modern 3-way catalytic converter that can neutralize all three at the same time. However, to achieve this is more difficult than just bolting a 3-way “cat” to the exhaust. The “cat” cannot oxidize the HC and CO pollutants to harmless carbon dioxide and water, and at the same time, reduce the NOx pollutants back to harmless nitrogen and oxygen, unless there is neither excess oxygen in the exhaust stream (caused by a lean mixture), or unburned fuel in the exhaust (caused by a rich mixture). In order for a 3-way “cat” to work, the engine must have its fuel-air mixture so perfectly controlled, that there is just enough oxygen to completely burn the fuel, with no excess oxygen left over. Chemists call this perfect mixture “stoichiometric”, and to achieve it you need exactly 14.7 parts air (by weight) to 1 part gasoline. But how to achieve such a perfect fuel-air mixture? Early electronic fuel injection systems (such as the Bosch LE Jetronic system used on the K100 series) monitored engine RPM, throttle opening, air temperature, coolant or cylinder temperature, and other factors, and used these to calculate an exact duration to open the fuel injectors during each inlet cycle. This resulted in far more accurate fuel metering than carburetors were capable of, but it was still not accurate enough to produce a perfect stoichiometric mixture needed for a 3-way “cat” to function. What was needed, was a method to sample the exhaust stream, determine if the mixture was too lean, too rich, or just right, then feed back the analysis to the fuel injection processor which could then make any necessary fuel mixture corrections. Around 1980, the Robert Bosch Corporation had the solution: they developed the exhaust oxygen sensor, that for the first time allowed such a feedback, or “closed loop” system to be implemented. Now, with an understanding of why the oxygen sensor is needed, we can start to talk about the sensor itself. At its heart is a zirconia (zirconium dioxide) element exposed to outside air on one side, and to the exhaust flow on the other. When oxygen is present on one side of the element and absent on the other, a new sensor will produce a signal of about 0.9 Volts. Since one side of the zirconia element is constantly exposed to air, the above signal will result when there is a rich mixture, since a rich mixture results in no residual oxygen in the exhaust. A lean mixture, on the other hand, results in residual oxygen in the exhaust. Now there is oxygen present on both sides of the zirconia element (even if only a tiny amount on the exhaust side), and no output signal (that is, 0 Volts) will be generated. The change is very abrupt; even the slightest amount residual oxygen in the exhaust will cause the output signal to swing instantly from around 0.9 Volts (the rich mixture value) to near-0 Volts indicating a lean condition. Now that we have a reliable way to indicate small changes between rich and lean mixtures, how is this information used by the fuel injection system? In operation, when the fuel injection processor detects a lean mixture condition (a nearly-zero Volt signal from the oxygen sensor) it reacts by injecting a little more fuel until a rich mixture signal (about 0.9 Volts) is sensed. The mixture is now very slightly rich. The processor senses this (via the oxygen sensor) and now slightly reduces the fuel being injected just enough to make a very slightly lean mixture. This is repeated endlessly, and rapidly, so the average fuel mixture is perfectly stoichiometric – neither rich nor lean – allowing the 3-way “cat” to function properly.  The fuel injection processor still uses engine RPM, throttle opening, air temperature, coolant or cylinder temperature, etc to calculate what it “thinks” is the correct duration for the injectors to open during each inlet cycle. Feedback from the oxygen sensor is simply used to fine tune the fuel-air mixture. This means that even if the oxygen sensor should fail or wear out, the motor will still run. The main difference will be that emissions will increase since the “cat” will not be able to function properly. In order for the oxygen sensor to function, it must be hot… 370°C or more. This temperature is easily reached since the sensor is sitting in the exhaust stream, but it takes several minutes to heat up after a cold start. To speed up the process and reduce initial emissions, oxygen sensors are now required to have built in heating elements. This is why the typical oxygen sensor has 4 wires: two for the sensor itself and two for the heating element. But what happens as the oxygen sensor ages? Lacking an understanding how the oxygen sensor works and how it ages, riders and mechanics often replace this expensive part needlessly. Above, I said that in the presence of a rich mixture (no oxygen in the exhaust), the sensor produced an output of about 0.9 Volts. As the sensor ages, this voltage starts to drop. Fortunately, moderate aging does not affect performance in any way. The fuel injection processor constantly compares the sensor’s output to a preset threshold of about 0.4 Volts. As long as the sensor voltage is greater than this value, it is interpreted by the fuel injection processor as a rich mixture, and the motor operates the same as if a new oxygen sensor was installed. The actual voltage value the sensor produces under a rich condition is irrelevant, as long as it exceeds the approximately 0.4 Volt threshold.  Oxygen sensors can be tested using nothing more than a simple digital voltmeter, but a little electronics understanding it needed. The simplest way to test the sensor’s function on BMWs equipped with a diagnostic port is to connect a laptop via Hexcode’s amazing GS-911 diagnostic link (http://www.hexcode.co.za/) , which produces (among many other functions) a real-time graph of oxygen sensor performance. So that’s it for a quick overview of Oxygen Sensor Basics. In the next “das Rundschreiben” issue, I’ll try to cover fuel injection and engine management basics.

Feb 25, 2017 - Member Update

Joining us today at the VBMWR's Winter Break-Out is David Pitman of Lake Country. David has moved into the area from Texas. Please join us in making him welcome to the Okanagan.
Returning to the fold after a year of life getting the way are Glen and Carrie Cullen. Welcome back folks.


March 11, 2017 - Member Update

We have another new member in the Kelowna area. Please join us in welcoming Blair Hope to the Valley BMW Riders.


March 23, 2017 - Member Update

We keep growing! Gerry MacDougall of Kamloops joined the Valley BMW Riders this week. Please make Gerry welcome and we hope to meet him in person at some upcoming events.


April 26, 2017 - New Member

We have another new member in the Kamloops area. Please join me in welcoming Tracey Maslyk to the VBMWR family.


May 6, 2017 - Member News

There must be something in the water in Kamloops. We have yet another new member from there. Please join us in welcoming Sharon Rambo to the Valley BMW Riders. Were glad to have you aboard Sharon and hope to meet you at our next event.


Feb 25, 2017 - Member Update

Joining us today at the VBMWR's Winter Break-Out is David Pitman of Lake Country. David has moved into the area from Texas. Please join us in making him welcome to the Okanagan.
Returning to the fold after a year of life getting the way are Glen and Carrie Cullen. Welcome back folks.


March 11, 2017 - Member Update

We have another new member in the Kelowna area. Please join us in welcoming Blair Hope to the Valley BMW Riders.


March 23, 2017 - Member Update

We keep growing! Gerry MacDougall of Kamloops joined the Valley BMW Riders this week. Please make Gerry welcome and we hope to meet him in person at some upcoming events.


April 26, 2017 - New Member

We have another new member in the Kamloops area. Please join me in welcoming Tracey Maslyk to the VBMWR family.


May 6, 2017 - Member News

There must be something in the water in Kamloops. We have yet another new member from there. Please join us in welcoming Sharon Rambo to the Valley BMW Riders. Were glad to have you aboard Sharon and hope to meet you at our next event.


Feb 25, 2017 - Member Update

Joining us today at the VBMWR's Winter Break-Out is David Pitman of Lake Country. David has moved into the area from Texas. Please join us in making him welcome to the Okanagan.
Returning to the fold after a year of life getting the way are Glen and Carrie Cullen. Welcome back folks.


March 11, 2017 - Member Update

We have another new member in the Kelowna area. Please join us in welcoming Blair Hope to the Valley BMW Riders.


March 23, 2017 - Member Update

We keep growing! Gerry MacDougall of Kamloops joined the Valley BMW Riders this week. Please make Gerry welcome and we hope to meet him in person at some upcoming events.


April 26, 2017 - New Member

We have another new member in the Kamloops area. Please join me in welcoming Tracey Maslyk to the VBMWR family.


May 6, 2017 - Member News

There must be something in the water in Kamloops. We have yet another new member from there. Please join us in welcoming Sharon Rambo to the Valley BMW Riders. Were glad to have you aboard Sharon and hope to meet you at our next event.


Feb 25, 2017 - Member Update

Joining us today at the VBMWR's Winter Break-Out is David Pitman of Lake Country. David has moved into the area from Texas. Please join us in making him welcome to the Okanagan.
Returning to the fold after a year of life getting the way are Glen and Carrie Cullen. Welcome back folks.


March 11, 2017 - Member Update

We have another new member in the Kelowna area. Please join us in welcoming Blair Hope to the Valley BMW Riders.


March 23, 2017 - Member Update

We keep growing! Gerry MacDougall of Kamloops joined the Valley BMW Riders this week. Please make Gerry welcome and we hope to meet him in person at some upcoming events.


April 26, 2017 - New Member

We have another new member in the Kamloops area. Please join me in welcoming Tracey Maslyk to the VBMWR family.


May 6, 2017 - Member News

There must be something in the water in Kamloops. We have yet another new member from there. Please join us in welcoming Sharon Rambo to the Valley BMW Riders. Were glad to have you aboard Sharon and hope to meet you at our next event.


Feb 25, 2017 - Member Update

Joining us today at the VBMWR's Winter Break-Out is David Pitman of Lake Country. David has moved into the area from Texas. Please join us in making him welcome to the Okanagan.
Returning to the fold after a year of life getting the way are Glen and Carrie Cullen. Welcome back folks.


March 11, 2017 - Member Update

We have another new member in the Kelowna area. Please join us in welcoming Blair Hope to the Valley BMW Riders.


March 23, 2017 - Member Update

We keep growing! Gerry MacDougall of Kamloops joined the Valley BMW Riders this week. Please make Gerry welcome and we hope to meet him in person at some upcoming events.


April 26, 2017 - New Member

We have another new member in the Kamloops area. Please join me in welcoming Tracey Maslyk to the VBMWR family.


May 6, 2017 - Member News

There must be something in the water in Kamloops. We have yet another new member from there. Please join us in welcoming Sharon Rambo to the Valley BMW Riders. Were glad to have you aboard Sharon and hope to meet you at our next event.


Feb 25, 2017 - Member Update

Joining us today at the VBMWR's Winter Break-Out is David Pitman of Lake Country. David has moved into the area from Texas. Please join us in making him welcome to the Okanagan.
Returning to the fold after a year of life getting the way are Glen and Carrie Cullen. Welcome back folks.


March 11, 2017 - Member Update

We have another new member in the Kelowna area. Please join us in welcoming Blair Hope to the Valley BMW Riders.


March 23, 2017 - Member Update

We keep growing! Gerry MacDougall of Kamloops joined the Valley BMW Riders this week. Please make Gerry welcome and we hope to meet him in person at some upcoming events.


April 26, 2017 - New Member

We have another new member in the Kamloops area. Please join me in welcoming Tracey Maslyk to the VBMWR family.


May 6, 2017 - Member News

There must be something in the water in Kamloops. We have yet another new member from there. Please join us in welcoming Sharon Rambo to the Valley BMW Riders. Were glad to have you aboard Sharon and hope to meet you at our next event.


Feb 25, 2017 - Member Update

Joining us today at the VBMWR's Winter Break-Out is David Pitman of Lake Country. David has moved into the area from Texas. Please join us in making him welcome to the Okanagan.
Returning to the fold after a year of life getting the way are Glen and Carrie Cullen. Welcome back folks.


March 11, 2017 - Member Update

We have another new member in the Kelowna area. Please join us in welcoming Blair Hope to the Valley BMW Riders.


March 23, 2017 - Member Update

We keep growing! Gerry MacDougall of Kamloops joined the Valley BMW Riders this week. Please make Gerry welcome and we hope to meet him in person at some upcoming events.


April 26, 2017 - New Member

We have another new member in the Kamloops area. Please join me in welcoming Tracey Maslyk to the VBMWR family.


May 6, 2017 - Member News

There must be something in the water in Kamloops. We have yet another new member from there. Please join us in welcoming Sharon Rambo to the Valley BMW Riders. Were glad to have you aboard Sharon and hope to meet you at our next event.


Feb 25, 2017 - Member Update

Joining us today at the VBMWR's Winter Break-Out is David Pitman of Lake Country. David has moved into the area from Texas. Please join us in making him welcome to the Okanagan.
Returning to the fold after a year of life getting the way are Glen and Carrie Cullen. Welcome back folks.


March 11, 2017 - Member Update

We have another new member in the Kelowna area. Please join us in welcoming Blair Hope to the Valley BMW Riders.


March 23, 2017 - Member Update

We keep growing! Gerry MacDougall of Kamloops joined the Valley BMW Riders this week. Please make Gerry welcome and we hope to meet him in person at some upcoming events.


April 26, 2017 - New Member

We have another new member in the Kamloops area. Please join me in welcoming Tracey Maslyk to the VBMWR family.


May 6, 2017 - Member News

There must be something in the water in Kamloops. We have yet another new member from there. Please join us in welcoming Sharon Rambo to the Valley BMW Riders. Were glad to have you aboard Sharon and hope to meet you at our next event.


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