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Old 09-24-2013, 06:03 PM   #1681
JRWooden
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Originally Posted by duffs View Post
Indeed - never a bad idea to fill the filter... most of the cars I've owned had somewhat downward pointing filters so they could be threaded on without the oil pouring out but all my bikes thread perpendicular to the ground so a little more tricky! Although I think it might be more a psychological thing because the 2 second or so it takes the oil pump to fill the filter is probably less hard on the engine than starting it up in sub-zero temperatures when all the oil is practically congealed in the sump...
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I'm with you ... can't always be done.
When I can make it work I do it, as much to pay homage to my dad as to do anything good for the engine ...

He was a stickler for details, I got it "honest"
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Old 09-29-2013, 09:18 PM   #1682
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Stupid Question: Why is there a red line (as opposed to a white line) on the speedometer at 50km/hr on my 13 F700GS?
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Old 09-30-2013, 12:45 PM   #1683
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Stupid Question: Why is there a red line (as opposed to a white line) on the speedometer at 50km/hr on my 13 F700GS?
Australian default speed limit (unless otherwise posted) reminder?



A bit of online research revealed that VWs destined for the European market have had the red line there since the early sixties. The same question has been posed an various motorhead forums for years, though I found no authoritative answer. So I'll add a bit of speculation: one of the km/h speedo markets have law or regulation requiring the red mark at 50 km/h, and BMW uses the same part for as many markets as it can.

Fred

FredRydr screwed with this post 09-30-2013 at 03:09 PM Reason: added photo of vintage VW speedo
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Old 09-30-2013, 12:58 PM   #1684
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Originally Posted by FredRydr View Post
Australian default speed limit (unless otherwise posted) reminder?

A bit of online research revealed that VWs destined for the European market have had the red line there since the early sixties. The same question has been posed an various motorhead forums for years, though I found no final answer.

Fred
not only australian but most of european countries. That is why often you see another one at the 90.
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Old 09-30-2013, 01:08 PM   #1685
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Sounds like a logical explanation to me!

Now I can finally sleep at night... haha jk
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Old 09-30-2013, 01:20 PM   #1686
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How does one interpret this label on the fuel tank cap?



First they say "Premium" which would mean 91/93 octane. But then they say "89 AKI" which is "Super", not "Premium".

The owner's manual mentions "Super" and there is no mention of 91/93 AKI anywhere, so I'm assuming Super/89 AKI is fine for this bike?
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Old 09-30-2013, 01:53 PM   #1687
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Originally Posted by Pete7874 View Post
How does one interpret this label on the fuel tank cap?



First they say "Premium" which would mean 91/93 octane. But then they say "89 AKI" which is "Super", not "Premium".

The owner's manual mentions "Super" and there is no mention of 91/93 AKI anywhere, so I'm assuming Super/89 AKI is fine for this bike?
put 91/93 in it and try to avoid falling under 89.
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Old 09-30-2013, 03:07 PM   #1688
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Quote:
Originally Posted by Pete7874 View Post
First they say "Premium" which would mean 91/93 octane. But then they say "89 AKI" which is "Super", not "Premium".
Those are vague American labels that one oil company or another used for advertising their fuels decades ago. Supreme, HiTest, Special, Fire Chief, No-Nox, Blue, Ethyl, Solvenized, whatever.

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Old 09-30-2013, 03:10 PM   #1689
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Originally Posted by FredRydr View Post
Those are vague American labels that one oil company or another used for advertising their fuels decades ago.
So you're saying that 89 octane is what I should be going by?
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Old 09-30-2013, 03:13 PM   #1690
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So you're saying that 89 octane is what I should be going by?
Yes. Always go by the numbers. For example, when you enter Colorado from Kansas, the labels remain the same but the numbers drop. (However, you can use the lower octane fuel at Colorado's high elevations. It's best to get an understanding of octane so you don't go nuts looking for 91 octane fuel in Leadville CO.)

Also, do a bit of research on the various octane rating numbers used around the planet.

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Old 09-30-2013, 03:15 PM   #1691
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Also, do a bit of research on the various octane rating numbers used around the planet.
Thanks, I'm well aware of these. At least BMW is consistent and specific about which octane rating they refer to. :)
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Old 09-30-2013, 05:43 PM   #1692
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AKI RON Octane

Found this post relevant and interesting:

Octane Rating Systems

As consumers, we use the pump octane and manufacturers recommendation to determine which gasoline to buy. Octane is a general term used to indicated a gasoline's ability to resist engine knock. The pump octane is also referred to as the Anti-Knock Index (AKI). AKI is determined based on an average of the Research Octane Number (RON) and the Motor Octane Number (MON). The formula is (RON+MON)/2 normally abbreviated as R+M/2 on the pump.
Octane is tested in a single cylinder octane test engine. The MON is a measure of the gasoline's ability to resist knock under sever operating conditions. MON affects high speed, part throttle and performance (under load such as in passing). The RON on the other hand, is a measure of gasoline's ability to resist knock under less sever conditions. RON affects low to medium speed knock and engine run-on (dieseling). For a given AKI, RON is typically 8-10 points higher than the MON. As an example, 87 AKI (pump octane) fuel would have a MON of 82 and a RON of 92.

What your engine requires to operate knock-free, is referred to as the Octane Number Requirement (ONR). The ONR for an engine is affected by design factors and real world conditions. Engineers must balance performance, economy and environmental concerns in their design. Compression ratio, ignition timing, air/fuel ratios, temperatures and combustion chamber design all have an affect on the ONR. Compression ratio has the most significant impact on the ONR and engine efficiency. The higher the compression ratio, the higher the ONR and combustion efficiency. Retarded timing, rich or lean air/fuel ratios, lower combustion temperatures and high swirl combustion chambers all work to reduce an engine's ONR.

In the real world, there are other factors that affect these designs including barometric pressure, temperature and humidity. Increases in barometric pressure or temperature, increase the ONR. Increases in humidity or altitude (lower barometric pressure), reduces the ONR. Combustion chamber deposits increase temperature and compression thereby increasing the ONR.

Late model R models (2 valve) - BMW recommendation is for a RON of 91 and MON of 82. Under most circumstances, Regular Unleaded 87 pump octane (AKI) will meet your needs. However, due to production variations, tuning, etc. the recommended pump octane (AKI) may not be adequate.

K75 & K100 (2 valve) - BMW's recommendation is 89 octane (AKI) with a RON of 95 and a MON of 85. We've found premium fuels are rarely required by these engines. I would recommend a high quality mid grade fuel.

R1100's - BMW recommends a "mid to premium" grade fuel with a minimum of 89 pump octane (AKI) with a RON of 95 and a MON of 85. I find no knocking in these engines when we use a high quality premium as opposed to the mid grade fuels.

K100 & K1100 (4 valve) - BMW recommends a "premium" grade fuel with a minimum of 89 pump octane (AKI) with a RON of 95 and a MON of 85. These bikes like a higher pump octane (AKI). I wouldn't recommend using anything other than a high quality premium grade fuel in these motorcycles.

My preference in all cases is Chevron due to the Techron additive in their fuels. This additive is also available under different names, however, I don't have to guess at the Chevron station. Whenever you purchase fuel, be sure to select brands that have passed the BMW unlimited mileage test. Note also that some brands do not include cleaners in their mid and low grade fuels.

You should use the minimum pump octane (AKI) fuel that will run in your engine without knocking. You're wasting your money on higher octane fuels if there aren't needed to control knock. The two most common myths regarding pump octane (AKI) are that it will increase performance, and result in better fuel mileage. You may see improvements in your bike due to the cleaners in higher grade, higher quality fuels. However octane by itself will not have any effect.

Larry Cann
BMW of Orlando
Phone (407) 826-4BMW
FAX (407) 856-0568
Tue-Sat, 1st & 3td Sun
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Old 09-30-2013, 07:03 PM   #1693
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Guys when checking oil, bike on center stand and the dip stick screwed in all the way or no?
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Old 09-30-2013, 07:11 PM   #1694
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Guys when checking oil, bike on center stand and the dip stick screwed in all the way or no?
Center stand, but dipstick not screwed in all the way - just resting on top of the thread, as per the owner's manual. Also, the manual says to check oil level when the oil is hot.
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Old 10-01-2013, 12:54 AM   #1695
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hot oil = turn it on and wait until the fan starts to work. then shut down and check it
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