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Old March 3rd, 2018, 10:52 AM   #1
Joined: Sep 2015
From: Denver, CO
Posts: 38

I Ride: 2014 Hyperstrada
Any Advice? '14 Hyperstrada 821 w/ 8k miles. Cranks fine, Fires then Dies

I usually try to ride year round. Tried to go for a ride to day and nothing.

Battery is fine.
Cranks strong.
Fires up (somewhat hesitantly vs. normal) then dies after a second or two.
Throttle does not help.

8k miles.
Oil level is fine and changed recently.

Have never had any issues w the bike ever except for a couple of times where it killed the engine when hot in bumper to bumper traffic.

Did happen one other time about a month ago but then it pulled through and revved. Did let it sit for about a month which is the longest its ever sat without being started but the gas was relatively fresh then.

We do have E10 Ethanol here in Denver.

Where to start? I'm just out of warranty of course.

Last edited by CountChocula; March 3rd, 2018 at 11:18 PM. Reason: Typo
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Old March 3rd, 2018, 02:07 PM   #2
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From: California
Posts: 1,237

Do you still have the charcoal canister installed?

Any weird error lights?
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Old March 3rd, 2018, 11:17 PM   #3
Joined: Sep 2015
From: Denver, CO
Posts: 38

I Ride: 2014 Hyperstrada
Thanks for the reply.

Canister still intact.
Was thinking of taking off anyway but it sounds like that may be part of the issue, perhaps?

Anyhoo...let her sit for 30 minutes and almost gave up again but on the last try I gave her some throttle and it ripped through.

So it was as if it wasn't getting fuel or air somehow starving.

Ran fine if not perhaps a bit jerky and low on power but it may have been subliminal since I was worried about it.

Started up 6 times throughout the day with no issue. Refueled at end of trip.

Try the canister removal?
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Old March 4th, 2018, 07:27 AM   #4
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Joined: Jun 2014
From: Boston
Posts: 937

I Ride: hyperstrada 821
All servicing done? Belts, valves etc..
All "recalls" done? (Free in and out of warranty)
engine light on?
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Old March 4th, 2018, 08:47 AM   #5
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Joined: Jul 2014
From: California
Posts: 1,237

Yea I'm not sure about your starting issue. I mention the canister because you said it was stalling. Mine used to stall when I got it and since I removed the canister it has never stalled again.
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Old March 5th, 2018, 06:52 PM   #6
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From: Phoenix
Posts: 100

Oh, man! Do I have a story for you. Grab some coffee, or your beverage of choice...

Just over a year ago, I bought a 2013 Hyperstrada, completely stock, with ~6,000 miles for road trip duty. This after an 8-year bike hiatus, and coming from a little Ninja 250. Three weeks later, I packed my things, filled up the tank and started a 3,000 mile road trip into Mexico with my father-in-law, but first I needed to make a 400 mile trip to meet him.

First stop, Globe, AZ and I fill up the tank again; everything's going well and I'm right on schedule.

Second stop, Safford, AZ, I fill up the tank again, start the bike and it starts normally, then dies immediately. I try a couple more times, with the same result. After the third one, the bike cranks but doesn't even start. I push the bike out of the way of the gas pumps, remove the seat and start looking for a problem.

After a few minutes trying, I call my buddy back in town, who helped me decide on the Hyperstrada. He owns a Multistrada and has flipped several bikes by fixing them himself. I explain the symptom and since it's gotten to the point that it just barely cranks, we start with the battery. I go across the street to a mechanic's shop and ask to borrow their multimeter; go back to the bike, sans my driver's license, and confirm that the battery is actually not the problem.

By then, my friend has called another friend who's built bikes to run on Bonneville. In the meantime, after returning the multimeter, I try again and the bike starts up, then dies immediately after, just like before. As it gets harder to start the bike, I have to do so by turning the throttle more and more.

My friend calls back and asks if, once started, I can keep the bike revved up so that it doesn't die. I try it once and I manage to keep it running for a few seconds, so I decide to give it a shot.

5 hours have passed since the problem started; I pack everything up again, replace the seat and put my gear on, then give it another try by starting it at almost full throttle. I manage to keep the bike running at about 7-8k RPM, with a few surprised looks from onlookers because the bike is very loud. Pull the clutch lever, 1st gear and I managed to storm out of there.

Once on the highway, everything is running normally, but I dare not stop until Lordsburg, NM when I need more gas. I nervously fill up the tank and get my phone out to let everyone know that I'm finally gone from Safford. I have calls and text messages from both of my bike friends and also from family waiting for my arrival.

Everything seems normal; bike start right up after filling up the tank, so I conclude that it was a fluke. Go inside to use the restroom and when I come back out I have to finish a call mid-way because I notice a fluid below the bike. I check and it's gasoline, coming from the canister. I go to start the bike and it hesitates but starts without much problem so I continue on my way.

I finally make it by night, but I decide to fill it up again before putting it to bed. We then start our trek to the blessing of the helmets in Mexico and all but forget about the starting issue, except for when we stop and continue theorizing about the root of the problem.

The leading theory is that I overfilled the gas tank, fluid made it into the canister and caused the starting problem. Since it was only my second or third time filling up this bike, I take that as valid because at that point I had no real reference. Thus, we conclude that I wasn't careful and caused the problem.

On the way back, just over a week after the problem, I stop to put gas in that same gas station that, worth noting at this point, had been my preferred gas station in Safford in the many trips done on cars; surprisingly, the bike has trouble starting again after filling it up. Since I now know what to do, it doesn't take me long before I'm out of there.

I fill up the tank two more times before finishing the trip back home, with absolutely no problems, and by then I've started noting the level of the gasoline in the tank when filling up, which starts making our theory above weaker and weaker.

I ride through that road almost any time I start a road trip. In the next trip, I stop at the same gas station and have the same problem, so I decide to stop filling up there. On the way back, I choose a different gas station, with the same result.

I have ridden through Safford 4 times since that first trip and every single time, with just one exception, I've had the same problem starting the bike, regardless of gas station. To make it even more confusing, it is in Safford where that has only ever happened to me, so now the theory is leaning more towards the altitude of the town, because fuel level in the tank is definitely not the cause of my problem (I've mistakenly overfilled it in other towns with no problem at all; I've filled it up in a multitude of mexican gas stations, also with no problem).

A couple of months ago I decided to remove the charcoal canister from the bike. In just two days, I'm heading out that way again and I'm purposely stopping to fill up at that original gas station, let it sit for a while, see if there's any fuel dripping that would have gone to the canister, and see if it's difficult to start after.

The base for the original theory is that even the owner's manual says that if the fuel tank is overfilled, fuel might go into the canister and the bike might be difficult to start.

I'm actually looking forward to this next trip to give it a try.
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Old March 5th, 2018, 07:35 PM   #7
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From: San Francisco
Posts: 355

I Ride: 2015 Hypermotard, 2018 Hypermotard SP
It does sound like the canister, but the altitude factor is odd. I've never had starting issues, but I've hard some weird surging problems from time to time on when on the highway maintaining 80+ mph. Some of that could be me being a giant sail in the wind, some could be a touchy throttle, but I wonder if some of it isn't the canister as I have definitely screwed up and overfilled the tank once or twice.
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Old March 5th, 2018, 07:43 PM   #8
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From: California
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Wow what a story with the canister lol.

The hyper gets overfilled very easily. I will often fill up leaving a nice gap between the top of the tank and fuel level, and still get some drips of gas coming out the overflow. In theory, the charcoal should absorb tiny amounts of gasoline and gas VAPORS, which then get sucked into the intake as you ride and are burned off, so that no raw gas ends up in the air or on the ground. In reality, the canister gets filled up with so much gas that it could be sucking raw fuel into the intake. I think?

Either way, remove the darn thing and see if it helps.
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Old April 17th, 2018, 04:24 PM   #9
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From: Phoenix
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I had forgotten to post an update after the trip without the canister.

Shortly after my previous post, I did my first trip after removing the canister. For experimental purposes, I filled up the tank in as many towns as I passed and watched the overflow line coming from the gas tank, that otherwise would have gone to the charcoal canister. I also filled up the tank as high as I have been filling it up this past 1+ year, which is at the very bottom part of the gas tank's neck filler.

There are two findings from this trip:

A) I fill up the tank, with the bike standing up (not on side stand) and take off right after.
B) I fill up the tank, also with the bike standing up, at the beginning of the stop; after filling up, I go to the restroom/store/rest/snack for a few minutes (always less than 30 minutes).

In every single B scenario, I came back to dripping fuel from the overflow line.

In every single A scenario, no fuel dripped (because the bike was never leaned with the full tank) or I didn't notice (less likely) because I was moving.


1) It's rather silly that the vapors' overflow is on the side to which the bike leans; I would have put it on the right side of the tank to avoid filling the canister with liquid fuel.

2) I have always overfilled the tank.

The intriguing part about conclusion #2 above is that even if I have always overfilled the tank, it has only ever failed in one particular town, out of maybe 100 different towns where I have filled up. I still can't explain why.

Regardless of the mystery above, in every single scenario B I was able to immediately start the bike without any problems. Thus, even if the mystery is still unsolved, the problem has been resolved by the removal of the canister, so I consider that a success.

Lessons learned:
- Do not even get to the bottom part of the filling neck (that's where I always stop) when filling up the tank.
- And/Or fill up at the end of your stop, right before you're ready to hit the road again.
- Remove charcoal canister
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Old April 17th, 2018, 04:59 PM   #10
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From: Canada
Posts: 189

I think the owner's manual mentions not overfilling the tank as well. Glad you got this sorted out though!
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821, advice, cranks, dies, fine, fires, hyperstrada, idle, miles, w or, won't start

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