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Now that the cold weather is here the cold start issue has resurfaced. I have upgraded the battery and run on Super Unleaded but it's still tricky to start. The bike is currently at the supplying dealer where they have performed a software upgrade and put a lighter 5w40 engine oil in on the instructions of BMW. I collect on Friday so will see what difference this makes.
 

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Since it was serviced back in September, my G310R has been transformed. It is less liable to stall and starts well from cold, even when left standing. I do check the battery is charged occasionally and it is 'stored' with ESSO premium unleaded in it as the latter is still alcohol free. But normally I use any old petrol when the bike is being run. I am not riding at the moment due to lockdown but I started the bike when it 5C outside a few days back and it fired up without even needing a bit of a throttle twist. Prior to its service, it would refuse to start with a charged battery, clutch in and a sniff of throttle plus 98RON petrol in the tank at anything below around 8C. So maybe a software tweak has been made?
 

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Hi K-Ken.. very interested to hear that bmw are now saying 5w-40 oil is the way to go..
I did this change myself about 18 months ago . I was getting fed up with the cold-start issue
It certainly made an improvement .
 

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Just picked the bike up from the dealership. The thinner oil is immediately apparent, it spins over more freely, clutch is smoother but it is more clunky when going into gear. The dealership tell me they tried the cold start for the last few days and it started up straight away with no throttle or clutch lever in. I will monitor it over the coming week to see how the cold start performs.
 

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2018 HONDA nc750X, 2019 BMWG310GS
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Mine is a 2019 GS ,purchased used last Fall with 1400 miles. It is sort of cold here, but stays 60 or so in my garage but the little booger is still balky--spins over fast enough but difficult to start--to be very technical there are too many "gitchy gitchy gitchy's before the vroom. I talked to two different BMW dealers last week and they had no definite fixes, but some ideas with partial throttle opening (I already knew that, and I use ethanol free premium).
Thank goodness I have another bike (Honda) that will fire without fail-----soooo my thoughts are just ride the beemer in the summer and be sure not to sell it when it's cold out. Other than that, I like it!
 

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The last 2 days I have tried the cold start at 5 degrees C & 0 degrees respectively after having the bike back from the dealer. It does start without the clutch in & no throttle but it's still not certain and still requires a few attempts. It's a lot better than it was, but still nowhere near as good as the Japanese bikes I have owned which start stright away whatever the conditions. I think this is as good as it's going to get, just as a reminder, the 4 items below have been applied to my bike to help solve the problem.

  1. Run on Super Unleaded with a lower ethanol content (Shell Optimax)
  2. Upgrade the battery to one with 165 CCA (Cold Cranking Amps) and 9Ah
  3. Dealer has performed a software upgrade under instructions from BMW
  4. Dealer has changed the oil to a thinner 5w40 under instructions from BMW

So that's the end of the road for me and the BMW 310GS. As soon as the 3 year warranty expires I will trade it in for a Honda and never buy BMW again.
 

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G310R been “resting “ in unheated garage December and January premium petrol in tank.
overnight temperatures down to -5C this last 2 weeks. Not on trickle charger.
started every 14 days and run up to fan start temperature .
No difference in starting procedure..clutch in and slight crack open on throttle. This is my normal procedure and has fired and started every time summer and winter. No complaints .
 

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G310GS, S1000RR. HP2.
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I bought the G310GS in 2018 and suffered the cold start in the winter time when temperatures came below 10°C.
Sufferd a lot of low batteries because of all unsuccessful starting procedures.
It was checked for the revised camshaft, but it was allready there.
My Dominator exhaust was removed, as the dealer said that this could be the problem.
It was not.

Starting the engine with 15° angle on the throttle was the only way it would come alive.
A lot of times it would not wanted to run for a second time.
It was a very small line between a good start, and not enough throttle.
After it stalled after 1-2 small runs, the engine will take more patience to come alive.
Wait 10 minutes(!!) for third or fourth try. This will succeed (use the throttle and keep it there!).

Last year the dealer performed a software upgrade, but still had to use the throttle at cold starts.
One year after this and some more kilometers o the road, it seems the engine is running with higher RPM when cold.
Though I read that there is no system for running another software program when cold????

Third, I think that running in the engine will change the bad starting when cold.
Mine has exceeded 6.000 miles, feels like a new bike, but first gear is much easier and starts like heaven!

The original battery is still inside, I did not trusted this one, but it works fine after all.

Funny that I am reading 5W40 in this topic.
I have changed the oil to 5W40 fully synthetic when it was getting colder.
Will change to standard specification in summer. Service at BMW dealer to remain three years warranted.

Current temperatures in Holland between 0°C and 10°C.
Tomorrow snow is expected.. will be fun. 🏍

I am very happy with the small BMW motorcycle.
And reliability seems to grows over the years. :ROFLMAO:
 

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G310GS, S1000RR. HP2.
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I was not using 15° throttle this year, but yesterday it stalled after the initial start of 2 seconds (with high revs?? strange).
Then it was impossible to start again, I think the spark plug was wet from gasoline.

Really nice to have in the rain.

I have tested several procedures, wait thirty seconds, one minute, two minutes, four minutes (kitchen timer on) and 10 minutes. Meanwhile charging the battery to have best power.

Only ten minutes did the job, started like nothing happend before.
I have ridden over 150 miles, with four start this same day. No trouble.
So patience is all.

I still have to be concentrated for next start.
But with the lock-down there are only four to six starts a month.
Maybe that is why the problem returns, or have returned only this time. ;)

Temperatures will raise in six weeks.
No trouble guaranteed for the rest of this year. 😂
 

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With the sub zero temperatures in the UK in the last week my bike has been easier to start than before after all the work done detailed in my last post above. Having said that, it still needs a little bit of throttle in freezing temps but it's better than it was. My Yamaha & Suzuki however start up no problem whatever the weather and without any "fixes" from the Dealer.
 

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What's this fuzz about needing to open the throttle when cold starting? Isn't it normal in cold weather? At least I've done that since I started operating internal combustion engine equipped vehicles 48 years ago. BMW even instructs so on p. 49 (English version) in the Rider's manual.
"When starting a cold engine
at low ambient temperatures:
disengage the clutch and turn
the throttle grip slightly to open
the throttle."
 

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I wrote that a visit to the dealer seemed to have resolved my cold start and too easy to stall problems and I can confirm this is still the case. BUT the bike needs a fully charged battery.
 
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