How big is the Valk's fuel tank? - Honda Valkyrie F6C Forum
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post #1 of 34 (permalink) Old 05-27-2017, 08:49 AM Thread Starter
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How big is the Valk's fuel tank?

I just measured it, by riding my bike until it stopped, tipping in 1.4 litres from a container and filling up 5km later (22.3 litres). My answer is 23.4 litres, from empty until the first surge up the filler tube when the tank is "full" (you can keep trickling in fuel for a while after that, Honda says not to). Bike on the side stand, and taking into account the 0.3 litres burnt in the 5km. Another squirt would take it to 23.5 litres. Honda claim 22.9 litres.
So, 424km (265 miles) for 23.4 litres (6.2 gallons) on that tankful is 18.1km/l or 42.7mpg.
The last bar on the fuel gauge started flashing at 329km, so that was when 5.2 litres was left. The owner's manual says 4 litres.

It looks as if I can hope for 90km or 56 miles of gentle 100km/h (62.5mph) riding when the warning starts, and a total fuel range of just on 400km (250 miles) at a more conservative 17km/l (40mpg).

The 5th bar of 8 turned off after 11 litres, leaving 4 of 8 on (1/2 tank), so when I see that happen I'll assume I can travel as far again as I already have, if I absolutely need to.

Now that I accurately know the tank capacity, I can verify the litres-to-empty at the halfway, last bar, and flash warning points on a couple more tanksfull, to see how consistent they are.
IanB

Last edited by blacki; 05-27-2017 at 08:56 AM.
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post #2 of 34 (permalink) Old 05-27-2017, 07:06 PM
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Imagine how much more fuel you can put in if you had a center stand.
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post #3 of 34 (permalink) Old 05-27-2017, 10:53 PM Thread Starter
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Actually, I do, but for garage use only.
I did consider holding the bike upright with one hand and holding the fuel trigger with the other while I topped it off, but decided this was a bad idea.
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post #4 of 34 (permalink) Old 05-28-2017, 11:16 AM
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Originally Posted by blacki View Post
I did consider holding the bike upright with one hand and holding the fuel trigger with the other while I topped it off, but decided this was a bad idea.
IanB
Why a bad idea? That's what I do, no problems yet. I do understand the pressure inside the tank could expand in hot temps, but I never just fill up and let the bike sit. I usually fill up on the way to somewhere so I'm burning some fuel before I get home and park for the night.
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post #5 of 34 (permalink) Old 05-28-2017, 12:55 PM
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True, I only "top off to the max" before a long all day ride. Thinking it gives Me more refueling options out on the road. Get to PPP [ preferred petrol providers ]
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post #6 of 34 (permalink) Old 06-01-2017, 03:57 PM
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You should be able to get more then 400k's? The best I have ever seen was 405k when the last bar started flashing.
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post #7 of 34 (permalink) Old 06-04-2017, 07:09 AM Thread Starter
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Turboyoshi, I thought it was a bad idea holding the bike upright with one hand, because if the bike moved too far for any reason, I'd need to rapidly throw away the fuel nozzle to grab the left grip. Maybe if the bike had a centre stand, or I was sitting on it I would top it off upright. Next time I might do that, to measure how much extra fuel would go in. After that, I can just trickle the extra in while the bike is on the side stand.

Shrubbo, from the numbers I measured on my bike, you did 405km on 18.2 litres, or 22.25km/litre, 52.5mpg. Maybe. My best is 19km/l, 44.8mpg. The last-bar-flashing point may be less than 5.2 litres from empty on your bike.

The fuel gauge is just a float and a sliding contact on a resistor. I think the relationship between true fuel level and the fuel gauge would be variable within and between bikes. The 23.4 litre capacity I measured should be close to the same on all GL1800 Valks. So at least you can assume 400km (250 miles) at anything better than 17.1km/l or 40mpg.
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Last edited by blacki; 06-04-2017 at 07:15 AM.
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post #8 of 34 (permalink) Old 02-22-2019, 08:03 PM
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Just did a search to find that magic number of 250 miles on a tank. Although there are a few variables that will change the number slightly.
I知 new to the Valk and always relied on my trip meter vs lights or indicators. Today I put a small fuel bottle in my bag and got the trip up to 227 miles. I didn稚 want to run empty on a CA freeway on Friday rush so I filled up. Took 6.2 gallons. Specs say 6.1. Guess I知 filling more than recommenced. I fill standing and sway the bike side to side to settle out any air.

I値l keep pushing the limits until I eventually run empty. Then I値l try again after switching to summer blend.
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post #9 of 34 (permalink) Old 02-22-2019, 11:42 PM
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Originally Posted by TLynn View Post
Just did a search to find that magic number of 250 miles on a tank. Although there are a few variables that will change the number slightly.
I知 new to the Valk and always relied on my trip meter vs lights or indicators. Today I put a small fuel bottle in my bag and got the trip up to 227 miles. I didn稚 want to run empty on a CA freeway on Friday rush so I filled up. Took 6.2 gallons. Specs say 6.1. Guess I知 filling more than recommenced. I fill standing and sway the bike side to side to settle out any air.

I値l keep pushing the limits until I eventually run empty. Then I値l try again after switching to summer blend.
I'm impressed! This is or used to be exactly how I filled the tank.

I bought mine 12/2018 and I'm still giddy with the size of this tank. I'm not so much concerned with pressing as much fuel in the tank. I get it up the neck, add a little more after moving side to side, and I'm done.

I figure if the trip meter is around 180 or so, better gas up.
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post #10 of 34 (permalink) Old 02-23-2019, 09:38 PM
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I've only gone through 2 tanks so far and got just over 38mpg each time. I wish I could get over 40 but I think with my size (6'3, 260) I don't think I'm going to be getting that magic number any time soon.

Last time I filled up I had 193 miles on the trip odometer and the tank took 5 gallons even, leaving me presumably 1.1 gallons or so left in the tank.

I find that my fuel gauge tends to read full for a good 80 miles, then drops rapidly for the next 80 miles, then hovers at the 1 to 2 bar level for quite a while before the last bar starts flashing with probably 1.5 gallons left in the tank.
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