Have you had the hard start problem?

[scott123007]

Only solution is WOT, pulling fuses, and/or waiting overnight.

- Mark

Or push starting the POS. Mine has only done it twice and neither WOT or removing the fuse worked, and I didn't have overnight to wait, LOL.. I ended up push starting it, (well, myself and a friend) and that worked.

 

[trainman]

As been discussed in this or other "hard start" threads, it is common in FI systems to have a flooded start protocol that is engaged by WOT which opens the throttle bodies and shuts off all fuel. Not sure we've ever had hard confirmation that the S10 has such a system, but like I said, it is common. WOT is definitely NOT a placebo..... ten (perhaps hundreds) of us have found it is the only way to get the bike to start if it is flooded. If you continue to try and start the bike with closed throttle after a flood, you can crank until the battery is dead.... it won't start.

Someone may have actually tested what the TB's are doing at WOT and I recall something to the effect of the butterflies open 1/4 of travel and the fuel is cutoff, but this is all from memory. There are probably 1k+ posts on this forum about the "hard start".

- Mark

ok, thanks for the info, maybe these things should be getting intelligent enough to register a non start and do all the changes reqd to the FI to get the thing started? at the least you would think that if flooding is a possibility (followed by non starting to the tune of several minutes effort) the manual would cover it (especially if the WOT treatment works as you suggest) - or is that an admission of a problem!!

 

[autoteach]

i wrote a massive post on how FI systems work and why they can't self diagnose a flood condition, but some people refuse to read it, or refuse to believe it. Just glad you folks dont have carbureted bikes.

 

[markjenn]

... at the least you would think that if flooding is a possibility (followed by non starting to the tune of several minutes effort) the manual would cover it (especially if the WOT treatment works as you suggest) - or is that an admission of a problem!!

I don't think the mfgs at this point think flooding is enough of a possibility to bother covering it, and like you said, if they did, it would be admitting that there might occasionally be a problem with their product. I'm not aware of any modern FI vehicle today which includes anything in the manual about flooding, although I'm sure there are outliers. Yamaha has been entirely consistent in being totally and utterly silent on this issue.

This is a strange issue - it happens very very rarely, but it does happen, sooner or later, to almost everyone.

- Mark

 

[Pilotuh1b]

So, it turns out you don't get a hard start until you get one.

I thought my bike was immune having never had a problem.

And then, leaving home for work, it hit. I rolled to the bottom of the driveway, like usual, I turned the key, like usual, I hit the starter, like usual, I cracked the throttle, like usual. The only thing that wasn't as usual was the cranking with no kick.

I tried and tried and nothing. Then I tried to clutch it, and nothing.

I pushed the bike back up the hil, into the garage and left in the car. Luckily.

So after leaving it a day I tried it, WOT, nothing. I left it a day and tried again, nothing.

The only thing that worked was to take of the side cover, pull the EFI fuse and crank it clear. Then replace and it started in two seconds.

It wouldn't have been achievable away from home due to tooling for the crash bars, so I'll need to rethink this problem.

Many many happy starts and one which would have seen me stranded and I've got to rethink my planning.

Pilotuh1b

 

[Juan]

So, it turns out you don't get a hard start until you get one.

I thought my bike was immune having never had a problem.

And then, leaving home for work, it hit. I rolled to the bottom of the driveway, like usual, I turned the key, like usual, I hit the starter, like usual, I cracked the throttle, like usual. The only thing that wasn't as usual was the cranking with no kick.

I tried and tried and nothing. Then I tried to clutch it, and nothing.

I pushed the bike back up the hil, into the garage and left in the car. Luckily.

So after leaving it a day I tried it, WOT, nothing. I left it a day and tried again, nothing.

The only thing that worked was to take of the side cover, pull the EFI fuse and crank it clear. Then replace and it started in two seconds.

It wouldn't have been achievable away from home due to tooling for the crash bars, so I'll need to rethink this problem.

Many many happy starts and one which would have seen me stranded and I've got to rethink my planning.

Pilotuh1b

What's the year of manufacture of your S10?

 

[Pilotuh1b]

2011 mate.

 

[Juan]

2011 mate.

Help us a bit more. Are you still on the original battery (4 years old) and what milage have the present plugs seen?

 

[Pilotuh1b]

Sorry, didn't think we were investigating. Thought it was just a case of admitting to having a hard start.

Bike has 18000K/12000M, serviced at 10,000K, not sure from memory if that included plug change, battery replaced mid last year. Kept on a trickle charger.

Never had a problem until the hard start.

 

[Juan]

Thanks. So the hard start wasn't the result of a weak spark not starting the engine and flooding it in the process.

 

[Pilotuh1b]

Could have been. It's slow to kick in general but others have said that's normal for the bike.

The brand new battery still didn't change that.

 

[bru]

Sorry, new to discussion. Have had an 2014 ES for alittle over a year. No hard start issues yet. What is the WOT procedure? Thanks.

 

[Checkswrecks]

Welcome aboard.
::003::


Search is your friend and the hard-start issue is a sticky in our sub-forum section for Power and Exhaust. The very first post in that thread has the procedure you ask for and the thread is here:
http://www.yamahasupertenere.com/index.php?topic=2149.0

 

[bru]

Thank you!

 

[markjenn]

Sorry, new to discussion. Have had an 2014 ES for alittle over a year. No hard start issues yet. What is the WOT procedure? Thanks.

We've had very few reports of problems in the 2014+ bikes and those that we have had sound more like the typical bike-sitting-too-long/flat-battery issue rather than the classic hard start bug that afflicts the earlier bikes, even with recent starts and a fresh battery.

- Mark

 

[JRE]

I'm still waiting for that Yamaha reflash that's been discussed...though I've never had the hard start, it sounds like it improves the fueling a bit.