HARD START

flonic

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Sep 18, 2019
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6
come back with a yamaha service information:
the problem of starting difficult with a predilection when the motorcycle is parked in the sun is due to a hose / pipe that takes the pressure of the gases formed in the tank (it is a constructive artifact for the Euro 4 models). when switching on and activating the start button, these gases would be included in the supply circuit at the same time as the gas supply from the gas pump.
hence the drowning of the engine with gasoline. the problem is that they did not give the solution.
 

EricV

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If the hose/pipe is external, could you perhaps insulate it to reduce the effects?

Sounds like an even better reason to use the stop switch. Less time between when the gases are released and you hit the start button.
 

Clawdog60

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Nov 14, 2018
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east central "ILL"
come back with a yamaha service information:
the problem of starting difficult with a predilection when the motorcycle is parked in the sun is due to a hose / pipe that takes the pressure of the gases formed in the tank (it is a constructive artifact for the Euro 4 models). when switching on and activating the start button, these gases would be included in the supply circuit at the same time as the gas supply from the gas pump.
hence the drowning of the engine with gasoline. the problem is that they did not give the solution.
That was good for a laugh.
 

flonic

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Sep 18, 2019
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If the hose/pipe is external, could you perhaps insulate it to reduce the effects?

Sounds like an even better reason to use the stop switch. Less time between when the gases are released and you hit the start button.
that was the discrete solution of yamaha (discreet, right?).
 

Tenman

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Dec 7, 2013
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Natchez Ms USA
After my last warm engine hard start a few years ago. I came home and cycled my key 20 times and she fired right up. The other day I was adjusting my headlight and killed it a few times without the kill switch and it coughed a time or two but started without much difficulty. This really is weird.
 

raynchk

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Nov 28, 2017
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Douglas, AZ
I just went through hell for the past day and a half. Haven't been riding because of a foot problem and bike has been setting for about 2/3 weeks. Yesterday went to fire her up and the old battery (OEM on 2016) didn't spin her fast enough and she wouldn't start. Charged and still had the same problem so went to Yamaha dealer (50 miles) and bought a new battery (14 rather than 12). Came home and tried to put battery in the wrong way... duh... and godd*am thing still wouldn't start. Left her on the charger all night and this morning she still wouldn't start. Puled air cleaner and checked filter, then pulled an easy to get to plug. Put everything back together and only had 1 rubber bushing left over :mad: (appx 1/2 x 3/4)? Cranked twice and after about 10 seconds she started. Never had a problem with this before. I think what I did wrong was replacing my Cyclops bulb and afterwards starting her up and not letting her run long enough, then shutting down and not putting the bike on a trickle charger. Somehow, my trust in the S10 has been diminished.
 

avn801

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Jan 2, 2020
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Ontario, Canada
If it ever happens again (maybe once every 5 years) just hold the throttle wide open and crank it. It will start. Happens to more bikes than just the S10 (fuel injected).
 

Cycledude

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I believe This is some kind of Yamaha problem, currently 546,000 miles on my Goldwing and the only time it has ever failed to start was when the battery was completely dead because I left the key in the accessory position overnight.
 

Sierra1

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….Left her on the charger all night and this morning she still wouldn't start....
Are you letting her cycle through the diagnostic start up thing when you turn the key on, before you hit the start button? I don't get to keep mine on a 'Tender very often, and my battery is about done. She will crank slow, but has always started. The only two times that she didn't, was when I hit the start button too soon.
 

Cycledude

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That just boggles my mind!! Those are some serious miles. And you have more than one bike!!
New experience today, washed Goldwing yesterday, this morning rode it 10 miles to local Walmart to pickup a prescription it was 21 degrees and i couldn’t turn it off because the switch was frozen, rode it back home and thawed the switch out with a heat gun, put a little WD40 on the key and everything worked fine again, rode back to Walmart and wondered all the while if the switch might be frozen again when I got there but it wasn’t, put on about 150 miles today and I believe that switch is actually turning easier than it has for a long time.
 
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raynchk

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Nov 28, 2017
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Are you letting her cycle through the diagnostic start up thing when you turn the key on, before you hit the start button? I don't get to keep mine on a 'Tender very often, and my battery is about done. She will crank slow, but has always started. The only two times that she didn't, was when I hit the start button too soon.
Yes, I let her cycle through the startup thing. I've been noticing this starting thing for awhile now, but never has she completely refused to start. I attribute it to failing battery, I'm going to do a spark plug/air filter tuneup soon which may help also. She's got 20,000 miles so I might have dealer do that and get valves checked at the same time. This along with the cruise control problem are definitely quirks of the S10. That '20 Africa Twin is looking better and better -- if only she had a driveshaft..
 

BaldKnob

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Aug 11, 2012
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SENC
I think what I did wrong was replacing my Cyclops bulb and afterwards starting her up and not letting her run long enough, then shutting down...
This^^^ appears to be the common denominator. That... and a weakened battery, are a recipe for the hard start.
 
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