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stagewex
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Just a general question about both.
Yesterday I left work (Manhattan/NYC) early to meet a friend upstate for dinner/ride and a Car Cruise-In at Bear Mountain, one of the last ones of the Summer. Blasting along at around 60 to 70MPH my bike suddenly lost all power and dangerously slowed down in fast traffic. I thought I was running out of gas but it happened so quickly that thoughts of "how the heck am I getting home" and "how much is this going to cost to fix" were flying in my head as I put the petcock on reserve. I'm also trying to avoid all the other nutty drivers as I thankfully coasted into a roadside parking lot.

First thing is that my generator light is clearly on so I know I have juice. I look down and see that my clear fuel line filters are empty/dry. Huh... I know I switched to reserve?? Well I didn't, in my haste to get to a safe place on the side of the road I mistakingly only made it to "off". Put on reserve, tickled the carbs once and she kicked right back on and I was on the road again, stopping at the first gas station I saw. Whew. So...

Is this normal for a vintage Beemer. I don't mean running out of gas but it is so, so very immediate, no telltale warning like on the other 30 motorcycles I've owned in my lifetime including other BMW's. When running out of fuel to switch to reserve there are those tell-tale signs that the engine is missing/gulping the last fuel. This bike basically has no mercy, so very immediate. I'll have to be more conscience of that fact as my mileage goes up vs. fill-ups. I'm running a Karcoma petcock from a /5 rather than the original Everbest.

On to the milage. 157 miles to reserve give or take a mile or two pulling 220lbs. When I filled-up yesterday it took exactly 3.5 gallons and I have a 4.5 fuel tank. That's about 44-45MPG but I think I should be getting better like 55+ according to the owners manual. What are you guys getting? 1969 r60/2 US Model, 23,653 miles.

In addition and this of course is subjective, I'm running Premium gasoline, mostly Mobil or Shell 93 octane. Bike runs great but I have not really tried the other (87 & 83) blends available in my area. What do you guys use? There is in no option locally for me to buy non-ethonol fuel.

My P-Touch reminders to myself that I'll temporarily affix to my handlebars as a reminder. Gett'in old sucks Smile HeeHee.

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mike wex/stagewex
1969 BMW r60/2, US Model, 1995 BMW K75, 2006 Yamaha TW200, 2007 Ural Patrol, 1991 Honda XR250L

Darryl.Richman
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Surf City, USA (Santa Cruz, CA)
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When you're on the freeway,

When you're on the freeway, you've got the throttle open pretty wide, so it will suck the last of the gas from the float bowl quickly. Usually one side has a longer hose, so the left cylinder will run dry first, so you should get some warning, but it won't be very long.

I have a 1961 R60/2 and I run regular in it. The gas here in California is *always* 10% ethanol. I usually get 42-44mpg. That's the same gas mileage my 1981 R65 gets.

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schrader7032
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San Antonio, TX
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I get around 175 miles to

I get around 175 miles to reserve on my '69 R69S...equates to about 50 MPG. I'm running the premium as my compression ratio is high. I would think that you could run a lower grade on the R60/2 as it is not as high compression. Spending for the premium stuff is only wasting money.

I have the clear filters and I begin to watch them as I get over 150-160 miles. I've never had it shut off violently, but I usually begin to feel those situations I've come to realize that things are getting close...them I'm ready for it when it does happen.

I don't have a trip meter on my R25/2 plus the odometer is in kilometers. After each fill up, I go home, compute the MPG, and project when the next fill up will be (in kilometers) and then round down to a nice number. I put a piece of blue painter's tape on the gas cap and write down that project kilometer reading. If I get to the kilometer reading, I BETTER be looking for a gas station. Usually, I'm too chicken and hit the station well before I reach the number on the piece of tape. I'm too chicken because I've run out of gas once. I learned the lesson on that particular tank...there isn't a saddle between the two halves of the tank like the R69S...I was dry when that happened. Funny, it still takes a lot of energy to push a small 250cc BMW!! Fortunately, I was saved by a nice girl who took some pity on me and went and got me a small amount of gas to get me to the gas station.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

miller6997
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Ditto

My experience on my sport-tank R69S is that there is not much warning. It hasn't happened to me in a long time, but I can recall cruising along and suddenly there is that sickening bup bup bup uuuuuhhh sound and you have to grope for reserve and/or grit your teeth and head for the shoulder. I also have the later Karcoma petcock, which at least is easy to put on reserve.

I consistently get in the forties for mileage: mid-forties for leisurely riding and low-forties for steady high speed travel. I have never had mileage in the fifties. (For comparison, my F800GT is consistently in the low sixties!)

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'67 R69S
'13 F800GT
Altadena, California

iagins
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Not much warning on my 67

Not much warning on my 67 R50/2. Gets an average in the mid-50's as far as mpg is concerned.

[Octane rant on]
Using premium gas in an R60/2 is just flushing $$$s down the carb. Octane is basically a measure of how combustible the gas is (not how much energy is contains). In a high-compression engine using low-octane fuel, you get pre-ignition (aka "knocking") when the fuel ignites before the piston is in the correct position. By using higher octane fuel, it takes more cylinder compression to cause ignition, which solves the problem. A low-compression engine like a /2 doesn't normally pre-ignite using lower octane fuel. So the rule of thumb is to use the lowest grade fuel that does not cause pre-ignitiion. Regular-grade works fine in my R50/2 and should work in your R60/2. If not, go to the medium grade.
[Octane rant off]

Ira Agins
Santa Fe, NM

stagewex
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Thanks guys, so I'm getting

Thanks guys, so I'm getting that not much warning is kinda normal. And premium fuel is not a necessity.

I'm planning a trip this weekend to the NY Air Show in New Winsdsor, NY with a side trip to the Motorcyclepedia in Newburgh (5 miles away from the Air Show) so should be putting around 300+ miles on the bike so I'll be able to have a couple fill-ups.
I'll try the middle-blend (I think that's 87?) and if no problems then down to just regular 83 octane for a go at it. The previous owner told me he always used Premium or the bike would "ping" so I figured so should I. But he really didn't ride it that much, just 2 tank-fulls of gas in the 3 years he owned her. She was a bit of a garage queen in her most recent life. Now she's out running like she should be.
A mechanic friend of mine who has worked on the bike with me also told me that high-test was a waste of $$ for this engine.

On the MPG I think I can do better. Whe you guys refer to "Sport Tank" do you mean the 4.5 that I have... the one with the tool box on the side?

I would love to hear the "bup bup bhp uuuuuhhh" (great description BTW) and I will listen for it at around 156 miles.

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1969 BMW r60/2, US Model, 1995 BMW K75, 2006 Yamaha TW200, 2007 Ural Patrol, 1991 Honda XR250L

butch housman
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"Back in the day", before

"Back in the day", before ethanol, I would consistently get 44 mpg from an R69US. I would expect u might get a little better than that from the R60 but then there's the lower BTU of the blended gas so u may be in the ball park w/ mid forties. I would be surprised if u get very far into the 50+ mpg range.

U may be able to get better mileage by leaning out ur carbs one notch & probably not notice too much difference in performance but it's NOT a good idea. Lean = HOT!

W/ a 6.5 gal. tank I used to try & fill by 150 or 200 miles max & that gave me a very comfortable pad. If u will just fill every 100 miles or so u'll be fine.

Be happy abt the reserve, my RK is fuel injected so there is no reserve & the gas gauge is definitely not linear so w/ a 5 gal. tank & 38 mpg I try to fill at 100-125 miles....150 max !

Needless to say ur riding habits & location contribute to ur mpg in a big way. I never get over 40 mpg in Kentucky & always get above 40 in Ohio...hills vs. flat.

Ride on Dude !
b

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schrader7032
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San Antonio, TX
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There were basically two

There were basically two tanks. The stock tank was 4.5 gallons and the sport tank was the larger 6 or maybe it was 6.3 gallon tank. Personally, I think the smaller tank looks best with the rest of the bike. My bladder doesn't really benefit from all that extra gas in the tank

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'78 R100/7 '69 R69S '52 R25/2

nedhoey
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Everbest

This year I installed a new production Everbest on my 1968 R69US. I couldn't resist. My original began to leak way too much and I had to replace it with a Karcoma. I wondered about leakage, as in not if but when it would start. The originals had a cork gasket for the lever; I didn't know if these new ones were different, but it didn't matter to me since these were new and looked exactly the same as the originals.

Well, it seems they replaced the cork with rubber. At least that's what it seems like from the feel of it. It is very very tight and has a sticky movement. I guess they were determined to solve the leak problem. So to get to the point, while I'm happy to have an original style petcock, I'm not looking forward to the next time I'll need to switch to reserve fuel while riding. I'm not at all sure I'll be able to flip the lever around while seated. So lately I'm buying gas sooner than I used to. Haha.

butch housman
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Where did u find a new

Where did u find a new Everbest ? Vech has instructions on his website on how to rebuild an Everbest. I've done it twice & never had a leak but it's a hassle & the last time & this last time it didn't flow well. I got tired of screwing around w/ it & replaced it w/ a Karcoma. Altho not original the Karcoma is a better petcock, works easier, no issues.
b

Luca
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i suggest a simple thing to

i suggest a simple thing to do,to understand when the bike will go in reserve.Firstly, as was said before,depends how you run fast,with full throttle your carbs will be dry very soon....try on a quiet street run and put off the petcock..feel the engine how became rough as soon as the fuel is finish in fuel hose.Remember this when you run,could be helpfull to anticipate the reserve.

Best regards
Luca

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stagewex
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Me Too

schrader7032 wrote:

There were basically two tanks. The stock tank was 4.5 gallons and the sport tank was the larger 6 or maybe it was 6.3 gallon tank. Personally, I think the smaller tank looks best with the rest of the bike. My bladder doesn't really benefit from all that extra gas in the tank

Definitely have to laugh at that. I said that I stopped for fuel as soon as I saw a gas station...I lied. First thing was a trip to the station restroom.

About 150+ miles times out to my bladder capacity at this point. I could probably use the belt pressure on my pants instead of the odometer as a parameter for getting to reserve. I'd need "Depends" if I went any further.

Here (below) is a sticker from the "Embalmers Car Club" that was showing off some old non-restored Rat-Rods the other night. I like their motto:

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mike wex/stagewex
1969 BMW r60/2, US Model, 1995 BMW K75, 2006 Yamaha TW200, 2007 Ural Patrol, 1991 Honda XR250L

Twocams
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That reminds me of a story.

That reminds me of a story. My youngest son (35) has been riding motorcycles from about age 12. We both ride BMW and he decided he wanted a new 2013 K1200S. Its about 400 miles from Sacramento to my house in Oregon. He was coming up to show off his new bike and we were going for a ride to the coast. He called me about 100 miles from my house and said he had a problem with his new bike. So I asked what he thought the problem was. Well he says "I guess the computer couldnt keep up with my 80-90 mph riding it said I had 2 gal. of gas left. And X amount of miles". I ran out of gas. What! Your $17000 BMW with 1500 miles on it, ran out of gas. He was able to coast to a gas station 1/4 away. I still give him hell about that and he still has the bike.

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stagewex
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Ran out of gas on a 2005 KLR

Ran out of gas on a 2005 KLR I used to commute to work on. Claim is that on the average you can get 58mpg on those bikes. So even going onto reserve on my way to work I was not in a hurry to re-fuel for my 40 mile total roundtrip to-and-from home. One (1) gallon of gas in reserve BTW.

Ran out of gas of course just 15 miles into reserve... in NYC of all places. Pushed and pushed and then went looking for a gas station wondering what happened to all the gas?

Turns out the big fuel tank on the KLR sits so deep into the backbone/frame of the bike a lot of fuel gets caught on one side or the other of the bottom of the tank, and the cross-over doesn't help that much. If I had just leaned the bike over left and right I could have gone another 25+ miles. Oh well, one of those live-and-learn adventures.

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1969 BMW r60/2, US Model, 1995 BMW K75, 2006 Yamaha TW200, 2007 Ural Patrol, 1991 Honda XR250L

c8h18
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You are not alone

So here I am out with my buddies deep in the Pine Barrens of NJ and we pull up to a local but rural gas station to top off. Of course I close my petcog when I tank up. Was done fueling and got busy talking while waiting for others. We all pull out..me last. Less than a quarter mile down the road same thoughts you were having. What's wrong? how much will this cost? why is it just dying? etc..Got it to a flat spot on the side of the road to find I didn't turn the petcog back on. Embarrassing for sure and we all had a good laugh..Yep, very little warning when she runs dry.

As for gas mileage typically low 40's/gal. I wind it out and ride it hard so may be consuming more fuel then when ridden in a gentle manner. I typically have it out on the slab just humming at 75-80MPH.

I once put a bit more than half a tank of blue AV fuel mixed in with the 93..(that was interesting and I was out of fuel options). MPG was slightly higher but that could have been for many reasons. These days I just run the 91 or 93 octane, the 87 seems to create some ping on my bike - 1969 R60/2.

stagewex
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Update:

Took the advice and started using the next lower octane grade. From High-test 93 to mid-test 87. About 4-5 tankfuls so far.
No pinging and I am getting almost 20 miles more per tankful before hitting reserve than before when I was using the 93.
Yesterday I hit 178 miles at reserve which is my best ever. It was usually at the very best 157 miles if you re-read my first post in this thread. I may try the lowest grade of 84-83 next full tankful. This actually fits in with the milage you are supposed to get as mentioned in the original owners manual.
These have all been 100+ to 200+ long highway rides so the conditions have been constant with little stop-and-go traffic.

Also seems to come to idle better now after a long run. Guess I was wasting my $$$ on high-test.

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1969 BMW r60/2, US Model, 1995 BMW K75, 2006 Yamaha TW200, 2007 Ural Patrol, 1991 Honda XR250L

Slash2
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Perhaps the BMW manual wasn't

Perhaps the BMW manual wasn't considering the weight of today's rider. While 220lbs is an average weight for today, I'd be willing to bet there weren't many guys of this size cruising beamers back in the 60's. The average man weighed about 165lbs in the 60's vs about 195lbs today. So if you factor in your extra 60lbs to the estimated mileage, I'd say you're doing pretty darn good.

At 165lbs I switch to reserve at 205 miles with steady consistency. That said, if I'm cruising on the highway (which I avoid at all cost) the warning is non-existent. One minute you're cruising wide open, the next it's like the plug was pulled and you're testing your speed and reflexes.

I just replaced the original Everbest petcock on my /2 with a new reproduction Everbest which really does look great. Exact in all ways aside from the cork which they've replaced with neoprene. I found mine on ebay from seller Spikebuck who has interesting bits and pieces from time to time. Another member mentioned that it's a bit tight in actuation, and while I'll agree with this, if you just give it a little workout before installation it loosens up and actuates nicely.

I've got a few old Honda's from the early 70's which give minutes of warning through the subtle burbling and buppety bupping of the engine's steady song. I've run out of gas on several occasions on old Honda's but as they have left-side petcocks and generally no crossover on the 4's you can stop, pop the seat, pull the tank off and dump the gas from the right to the left and get another 10 miles or so.

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64' R60/2 - 66' R27 - 51' R67 - 68' R69S
88' R100RS - 06' K12R

schrader7032
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San Antonio, TX
Joined: 10/27/2006
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Another "Reserve"

Slash2 wrote:

I've run out of gas on several occasions on old Honda's but as they have left-side petcocks and generally no crossover on the 4's you can stop, pop the seat, pull the tank off and dump the gas from the right to the left and get another 10 miles or so.

That's something to remember with the /5-on bikes. There are two saddles and despite having two petcocks, there is usually gas below the reserve straw in the tank...provided the straws are still there. Take the tank off, roll the gas from one side to the other, maybe get you another 15-20 miles down the road.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

jrapose
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Don't ever run regular...especially with a R69S

Boy, did I ever learn.... burned a hole in a piston...what a mistake.... if I can't get premium fuel I walk... it's that high compression of the R69S.... I guess it would run in a lower compression R50 or R60 but that lesson I learned hurt a lot...

Joel Rapose
1966 R69S

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stagewex
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Seems to run fine and better

Seems to run fine and better on a lower compression r60. I'll see if switching to the lowest grade makes any performance difference in the negative. Right now I'm pretty happy with the results at 87 octane.
Looking to lose some weight as well so I can be average. HeeHee.

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mike wex/stagewex
1969 BMW r60/2, US Model, 1995 BMW K75, 2006 Yamaha TW200, 2007 Ural Patrol, 1991 Honda XR250L

butch housman
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hi test

to each their own but:
I would always run hi test in all bikes...can't hurt. Only my atv gets regular.
The exception would be if I was buying gas from someplace that sells very little hi test, that can be an issue.
I think ur increased mpg is NOT a result of using a lower test fuel!
In the day my R69US got 44 mpg all the time but after a rebuild it had to be rejetted to a140 left & 145 right ... it now gets 36 mpg but it runs good & the plugs look good.
I know nothing

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