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-   -   New Owners - Stupid Questions Thread (http://www.advrider.com/forums/showthread.php?t=639349)

HighFive 11-22-2010 01:09 PM

New Owners - Stupid Questions Thread
 
Here's a place for new owners to ask those "stupid" questions. The kind you're embarrassed to ask for fear of being laughed at, or lectured for being such a noob. Questions like: Where's the fusebox? or What does OBC stand for?

Then hopefully some wise BMW sage who, feeling ambivalent or simply bored, cruises by might share said wisdom with grace and style.

Since I seem to be a frequent violator, I'll start this Thread by asking my next stupid question:

"Is something wrong with my fuel range calculator on the display? It never reads higher than about 110 miles, after I refill the tank. It seems to wait until the fuel level falls below a certain level, then it begins a countdown from 100 toward zero. Is that the way all the OBC's work?


HF :ear

itsatdm 11-22-2010 01:19 PM

See the little arrow next to the mileage est? When on it means greater than. What mileage the instrument shows seems to vary among bikes and even on the same bike at times. It is not accurate because of the shape of the tank, except for the grossest measurement. Mine usually starts in the ^12? range than slowly increases. Once the arrow disappears it is supposedly measuring true mileage estimate. Mine still varies, being pessimistic until it gets down to about 80 miles.

JoelWisman 11-22-2010 01:53 PM

This symbol ">" displayed on the fuel range means greater than.

The crux is that most BMW bikes including the F800 have strange shaped fuel tanks. The fuel level sensor is not in a place to be able to tell just how full the tank is, but simply that there is more then 2.4 us gallons.

So if your tank is fullish, all the computer knows is that there is somewhere between 2.4 and 4.2 us gallons.

As such, the computer assumes worst case (2.4) and displays the ">" symbol to let you know that your range is likely at least X miles, but may be much more.

Once fuel gets down to a level the sensor can read, the ">" symbol will disappear and live computations will commence.

As far as I know, the only thing changed on newer models is that the range does not count to zero but rather changes to display "--" when range is very low. I do not know if software updates will change this functionality on older models.


Note: the OBC estimates range bassed on averages of past performance, current rate of usage, and other factors.

The OBC's estimate of your range is just a guess. The computer has pretty good information of what has happened in the past, but no idea what will occur in the future. Changes in terrain, elevation, wind, fuel energy content, riding style, payload ect are beyond it's capabilities to control for.

Take the range as a potentially helpful estimate at best.

When the low fuel light kicks on, at best, you really need gas soon!

Actually since BMW is not known for sourcing the best fuel level sensors, there is no reliable substitution for an awareness of how many miles ago the tank was filled versus what demands have been placed on the fuel since.

I strongly encourage use of a trip meter :)

YamWOW! 11-22-2010 01:59 PM

Quote:

Originally Posted by HighFive
Here's a place for new owners to ask those "stupid" questions. The kind you're embarrassed to ask for fear of being laughed at, or lectured for being such a noob. Questions like: Where's the fusebox? or What does OBC stand for?

Then hopefully some wise BMW sage who, feeling ambivalent or simply bored, cruises by might share said wisdom with grace and style.

Since I seem to be a frequent violator, I'll start this Thread by asking my next stupid question:

"Is something wrong with my fuel range calculator on the display? It never reads higher than about 110 miles, after I refill the tank. It seems to wait until the fuel level falls below a certain level, then it begins a countdown from 100 toward zero. Is that the way all the OBC's work?


HF :ear

http://i305.photobucket.com/albums/n...up/dummies.jpg

Subscribed! :lurk

JoeDuck 11-22-2010 02:59 PM

Quote:

Originally Posted by HighFive
Here's a place for new owners to ask those "stupid" questions. The kind you're embarrassed to ask for fear of being laughed at, or lectured for being such a noob. Questions like: Where's the fusebox? or What does OBC stand for?

Then hopefully some wise BMW sage who, feeling ambivalent or simply bored, cruises by might share said wisdom with grace and style.

Since I seem to be a frequent violator, I'll start this Thread by asking my next stupid question:

"Is something wrong with my fuel range calculator on the display? It never reads higher than about 110 miles, after I refill the tank. It seems to wait until the fuel level falls below a certain level, then it begins a countdown from 100 toward zero. Is that the way all the OBC's work?


HF :ear

Get your bikes software updated and you wont have that issue with the OBC. It'll give no distance and then after you hit reserve show you miles ridden on reserve.

Here's a dumb question: Is it bad to use heated grips in the rain?

MCMXCIVRS 11-22-2010 03:40 PM

Quote:

Originally Posted by JoeDuck
Here's a dumb question: Is it bad to use heated grips in the rain?

Only if you hate warm hands.

SlowRide13 11-22-2010 04:04 PM

Quote:

Originally Posted by JoeDuck
.....and then after you hit reserve show you miles ridden on reserve.

And on that note; what is meant by 'reserve' on this bike?:scratch

JoeDuck 11-22-2010 04:16 PM

Quote:

Originally Posted by SlowRide13
And on that note; what is meant by 'reserve' on this bike?:scratch

I don't have the manual infront of me, but IIRC its ~1.1 gallons remaining.

HighFive 11-22-2010 05:40 PM

Excellent input....thanks for that info Itsatdm & Wiseman. I had not noticed the Greater Than symbol, and certainly didn't understand the inner workings. Does BMW not know how to measure volume progressively in the tanks they build? Seriously....not being sarcastic. Seems they would use the same mold to make the tanks the same way, and then be able to measure volume (by sensor height incrementally, very accurately. But what do I know?

Regarding Heated Grips in the rain....definitely no problemo! You will not create a short circuit or an dangerous condition by doing so. You're not very likely to be electricuted by the 10 amp draw (just guessing on amperage) under any condition. Well....er...a...unless you put your feet down and become "grounded". Another fine reason to keep your feet on the pegs!

HF :deal

p.s. What does reserve actually mean on this bike? Would that be when the fuel range counter begins decrementing or when the fuel light comes on? So, would that mean 2.4 gal or 1.1 gal or what?

itsatdm 11-22-2010 09:35 PM

It varies between bikes. I have run mine close to 0 miles a few times and I had .8 gal left. Fuel light usually comes on around 40 miles to empty, so guessing at that point 1.5 gal. Something you are better determining yourself.

HighFive 11-23-2010 06:57 AM

Very interesting, Itsatdm. I'll have to pack some fuel and go run her dry to test this. Seems to be an odd configuration of communication. Countdown to zero, but still have 35 - 40 miles of range remaining. I'd think (or hope) the fuel light and the fuel range counter were sync'd together closer than that. Of course, I understand the fuel range is a computation based on running average for mpg. But still, it ought to be dialed in closer than that.

Nevertheless, it is what it is. So, good advice I think....to go find out for myself. There's that "Knowing" issue again.

Now, come on new owners, I know you have some more stupid questions you want to ask. See what great info came out of the last question? I need your help, as I'm too stupid to even think of all the stupid questions. But here's another:

"If I perform my own oil changes, does that violate my warranty?"

Does all service really have to be done by a certified BMW mechanic to maintain warranty rights? Seems they have a loophole (or more likely "loop-out" at every turn). So, I just want to know....for sure. Is there a real policy rule regarding this issue. Because I'm surely not going to take my bike into the shop for basic service maintenance....like re-adjusting chain tension, bleeding hydraulics in the brake lines, etc. Where's the line drawn?

HF :ear

KnuckC 11-23-2010 07:39 AM

Quote:

Originally Posted by HighFive
"If I perform my own oil changes, does that violate my warranty?"
Here in Canada, I believe that owners are permitted to service their vehicles wherever they want and are not limited to the dealer. Of course if the dealer can establish that the service was performed improperly and problems arose directly from that improper service then warranty may not cover the issue.

soyanarchisto 11-23-2010 07:46 AM

Does removal of the charcoal canister void any of the warranty?

itsatdm 11-23-2010 10:20 AM

There is a Federal Statute that gives consumers protection and many/most states have there own consumer protection laws. It is a voluminous law written and probably only understood by lawyers, here is a short version.
http://www.dummies.com/how-to/conten...ty-intact.html

I have done the typical oil and filter changes, but left the first valve check to BMW. Mainly I did so that so there was no question about the warranty back when I was having issues and because the BMW manual had no info on the shim measurements in case I needed one.

I fully documented what I did with photo's, showing mileage, parts and different stages of the service.

Re: adding and removing parts. If BMW can show a direct connection between what mods you have made and the subsequent damage as to a result to a specific componant, they can void that componant from warranty coverage.

I think I have mentioned, BMW has a lot of Lawyers, use your own descretion.

SlowRide13 11-23-2010 01:00 PM

I document my oil/filter changes and other fluids with pix, but have decided to keep paying BMW to do the torque check of all the fasteners (and the rest of the service). I figure if a part failed or fell off I would be 'holding the bag' if I had torqued the fasteners myself.


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