Posts: 5,044
Threads: 137
Likes Received: 168 in 66 posts
Likes Given: 86
Joined: May 2013
(02-05-2018, 02:55 PM)SportsterDoc_imp Wrote: (02-05-2018, 02:00 PM)LongRanger_imp Wrote: Doc, I ran my '78 CB750F dry while crossing Utah back in 1979. I was fighting a stiff crosswind and was heeled over for many miles. Unbeknownst to me, because the bike was leaned over so far, it was able to suck the last of the fuel through the normal petcock tube. When the engine began to sputter, I flipped over to reserve, only to find there was precious little fuel remaining. The bike ran out of gas and rolled to a stop about ten miles later. The next town was 24 miles ahead. I wasted about three hours hitchhiking up and back to get gas.
To your point about crossing Nevada, Tonopah to Ely is about 170 miles and it's very difficult to do it at less than 90-100 mph. There is no gas (or anything else) between those towns. Gotta pay attention to your gas gauge at those speeds!
Must have been serious crosswinds!!!
Yes, highway 6 is desolate. The ghost town of Warm Springs is at the junction of 6 and the Extraterrestial Highway
(02-05-2018, 02:09 PM)EmptySea_imp Wrote: I didn't mean to imply that it is not important to know the capacity, Doc, and your trip plans are a great example of why it is important. I just was trying to point out that it just takes one ride to get the tank to (or extremely close to) empty and once it is filled up you will know the tank capacity. If you ran it until the pump started sucking air, you would know that capacity, too. Since there appears to be at least two different capacities listed by Honda, I think that the easiest way to verify it is first hand...and not on the side of mountain. LOL
As best I understand, 2014 standard is 3.9 and Deluxe 4.4.
Are all 2017 4.4?
As best I understand, 2014 standard is 3.9 and Deluxe 4.4.
Are all 2017 4.4?
I can only tell you that everything I have read (aside from a couple of comments in this thread) shows the fuel capacity for the 2017 EX as 4.4 gallons. I don't know of anyone that has stated with authority the effective fuel capacity (how many gallons until the fuel pump has nothing to pump). I would guess that the easiest way to know for sure the effective capacity is to fill it up, run it down, and re-fill it.
Posts: 14
Threads: 0
Likes Received: 0 in 0 posts
Likes Given: 0
Joined: Mar 2014
Most Vehicles use the Fuel in Fuel tank to cool the Fuel pump, so running it our "might" lessen the Fuel Pumps life span.
Just a thought
Posts: 1,287
Threads: 33
Likes Received: 42 in 21 posts
Likes Given: 6
Joined: Oct 2017
(02-06-2018, 01:42 AM)SpamJ_imp Wrote: Most Vehicles use the Fuel in Fuel tank to cool the Fuel pump, so running it our "might" lessen the Fuel Pumps life span.
Just a thought
That has been my thinking for many years, however it depends upon the pump system:
A. If continuous flow with unused fuel recirculated to the tank, then flow cools pump.
B. If regulated, such as variable voltage or a pressure regulator and flow is not continuous, then the pump may get hotter.
When I managed an electric motor repair shop, we also sold and repaired pumps and most would burn the seals if run without fluid.
OTOH, the 12 VDC water pumps at our ranch are supposed to be able to run dry without harm. They sure don't like it if not purged before freezing weather!
Posts: 7,088
Threads: 94
Likes Received: 581 in 317 posts
Likes Given: 971
Joined: Apr 2025
(02-06-2018, 01:56 AM)SportsterDoc_imp Wrote: (02-06-2018, 01:42 AM)SpamJ_imp Wrote: Most Vehicles use the Fuel in Fuel tank to cool the Fuel pump, so running it our "might" lessen the Fuel Pumps life span.
Just a thought
That has been my thinking for many years, however it depends upon the pump system:
A. If continuous flow with unused fuel recirculated to the tank, then flow cools pump.
B. If regulated, such as variable voltage or a pressure regulator and flow is not continuous, then the pump may get hotter.
When I managed an electric motor repair shop, we also sold and repaired pumps and most would burn the seals if run without fluid.
OTOH, the 12 VDC water pumps at our ranch are supposed to be able to run dry without harm. They sure don't like it if not purged before freezing weather!
That has been my thinking for many years, however it depends upon the pump system:
A. If continuous flow with unused fuel recirculated to the tank, then flow cools pump.
B. If regulated, such as variable voltage or a pressure regulator and flow is not continuous, then the pump may get hotter.
When I managed an electric motor repair shop, we also sold and repaired pumps and most would burn the seals if run without fluid.
OTOH, the 12 VDC water pumps at our ranch are supposed to be able to run dry without harm. They sure don't like it if not purged before freezing weather!
+1
PB
Posts: 1,287
Threads: 33
Likes Received: 42 in 21 posts
Likes Given: 6
Joined: Oct 2017
(02-06-2018, 01:28 AM)Ulvetanna_imp Wrote: (02-05-2018, 03:04 PM)Guth_imp Wrote: People used to say that it wasn't wise to run a fuel tank down to empty because of the sediment that might have formed and settled in the bottom of the tank over many years time. There probably aren't any CB1100s that yet qualify for such concerns. Another thing in our favor with these new EFI bikes is the fuel filter being used. These are much better than the old paper gravity filters from back in the day, and the systems are under a lot of pressure.
In R&R'ing the tank on my 2013 (which had to be done several times for various maintenance procedures) I took note of the fuel connector and the overall setup. Manufacturers are very careful about this stuff these days.
(02-05-2018, 02:50 PM)SportsterDoc_imp Wrote: (02-05-2018, 02:00 PM)LongRanger_imp Wrote: Doc, I ran my '78 CB750F dry while crossing Utah back in 1979. I was fighting a stiff crosswind and was heeled over for many miles. Unbeknownst to me, because the bike was leaned over so far, it was able to suck the last of the fuel through the normal petcock tube. When the engine began to sputter, I flipped over to reserve, only to find there was precious little fuel remaining. The bike ran out of gas and rolled to a stop about ten miles later. The next town was 24 miles ahead. I wasted about three hours hitchhiking up and back to get gas.
To your point about crossing Nevada, Tonopah to Ely is about 170 miles and it's very difficult to do it at less than 90-100 mph. There is no gas (or anything else) between those towns. Gotta pay attention to your gas gauge at those speeds!
That must have been a serious cross-wind!!!
Working on Ipad, I thought I dropped this post, which is now redundant.
Tried to delete, but do not have permission Lol, I believe the time limit is 60 minutes or less. So be sure you don't say anything you will later regret; it'll be there for posterity.
I know that the time limit has definitely changed my approach to posting; I may be disputatious at times, but try to keep it reasonable, respectful, and lay off the ad hominem stuff, while I attempt to stay on point.
It was just a few minutes after posting.
Posts: 403
Threads: 13
Likes Received: 1 in 1 posts
Likes Given: 0
Joined: Oct 2017
(02-06-2018, 01:56 AM)SportsterDoc_imp Wrote: (02-06-2018, 01:42 AM)SpamJ_imp Wrote: Most Vehicles use the Fuel in Fuel tank to cool the Fuel pump, so running it our "might" lessen the Fuel Pumps life span.
Just a thought
That has been my thinking for many years, however it depends upon the pump system:
A. If continuous flow with unused fuel recirculated to the tank, then flow cools pump.
B. If regulated, such as variable voltage or a pressure regulator and flow is not continuous, then the pump may get hotter.
When I managed an electric motor repair shop, we also sold and repaired pumps and most would burn the seals if run without fluid.
OTOH, the 12 VDC water pumps at our ranch are supposed to be able to run dry without harm. They sure don't like it if not purged before freezing weather!
If there is no fluid then there is no load, so it may overrev --> burnt seals.
Also, if there is no load, current through the pump will be much higher unless the electronics can avoid it. This could also harm the pump.
In any case: I think any modern fuel pump can be run dry for a while without being damaged at all. ("Modern" as "designed after the 80s").
Posts: 5,044
Threads: 137
Likes Received: 168 in 66 posts
Likes Given: 86
Joined: May 2013
(02-06-2018, 01:58 AM)SportsterDoc_imp Wrote: (02-06-2018, 01:28 AM)Ulvetanna_imp Wrote: (02-05-2018, 03:04 PM)Guth_imp Wrote: People used to say that it wasn't wise to run a fuel tank down to empty because of the sediment that might have formed and settled in the bottom of the tank over many years time. There probably aren't any CB1100s that yet qualify for such concerns. Another thing in our favor with these new EFI bikes is the fuel filter being used. These are much better than the old paper gravity filters from back in the day, and the systems are under a lot of pressure.
In R&R'ing the tank on my 2013 (which had to be done several times for various maintenance procedures) I took note of the fuel connector and the overall setup. Manufacturers are very careful about this stuff these days.
(02-05-2018, 02:50 PM)SportsterDoc_imp Wrote: (02-05-2018, 02:00 PM)LongRanger_imp Wrote: Doc, I ran my '78 CB750F dry while crossing Utah back in 1979. I was fighting a stiff crosswind and was heeled over for many miles. Unbeknownst to me, because the bike was leaned over so far, it was able to suck the last of the fuel through the normal petcock tube. When the engine began to sputter, I flipped over to reserve, only to find there was precious little fuel remaining. The bike ran out of gas and rolled to a stop about ten miles later. The next town was 24 miles ahead. I wasted about three hours hitchhiking up and back to get gas.
To your point about crossing Nevada, Tonopah to Ely is about 170 miles and it's very difficult to do it at less than 90-100 mph. There is no gas (or anything else) between those towns. Gotta pay attention to your gas gauge at those speeds!
That must have been a serious cross-wind!!!
Working on Ipad, I thought I dropped this post, which is now redundant.
Tried to delete, but do not have permission Lol, I believe the time limit is 60 minutes or less. So be sure you don't say anything you will later regret; it'll be there for posterity.
I know that the time limit has definitely changed my approach to posting; I may be disputatious at times, but try to keep it reasonable, respectful, and lay off the ad hominem stuff, while I attempt to stay on point.
It was just a few minutes after posting.
It was just a few minutes after posting.
You can edit (within either 60 or 30 minutes, I don't recall), but you cannot delete a post once it's posted. Let me try..just to be sure. brb
Nope... cannot delete..only edit.
Posts: 23,479
Threads: 697
Likes Received: 596 in 265 posts
Likes Given: 774
Joined: Apr 2025
60 minutes for editing. That's generous. Another forum I am on has a 3 minute time limit for edits before you have to contact the administrator. You really should be able to figure out what you wanted to say in an hour. After an hour you can contact a moderator or administrator to edit the post for you. As far as deleting a post, due to an issue in the past, only a moderator or adm can delete a post. If you want a post deleted, you must pm Guth, Cormanus or myself and we can take care of that for you, as long as it's doesn't upset the flow of conversation.
Posts: 1,287
Threads: 33
Likes Received: 42 in 21 posts
Likes Given: 6
Joined: Oct 2017
(02-06-2018, 02:53 AM)The ferret_imp Wrote: 60 minutes for editing. That's generous. Another forum I am on has a 3 minute time limit for edits before you have to contact the administrator. You really should be able to figure out what you wanted to say in an hour. After an hour you can contact a moderator or administrator to edit the post for you. As far as deleting a post, due to an issue in the past, only a moderator or adm can delete a post. If you want a post deleted, you must pm Guth, Cormanus or myself and we can take care of that for you, as long as it's doesn't upset the flow of conversation.
For casual posts, yes.
For technical posts, I should delay posting and finish research, first.
If the issue is already solved, then no need to post.
Posts: 1,186
Threads: 92
Likes Received: 143 in 40 posts
Likes Given: 0
Joined: May 2025
btw.
last year at the DLX i put littel bit more in as the honda specs. tell and i was not run out of gaz ( ok i think short before that, in short cornering i felt a short littel faltering engine ).......or the gazstationindication was so much inaccurate...but/ and if i remember right as i made the count from the middel consumption it was the normal amount l/km
|
