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7 Nov 2011
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Depends how far and how long you can push it for. If the battery is flat, I'm not actually sure if you could try and generate enough for the pump and electronics from using the generator while the bike is moving. I think if you got a tow in a high gear, you might just get going.
Obviously getting a tow on a bike is risky but there are 'safer ways' to do it.
NEVER tie the rope to the bike. Wrap it around the headstock a few times and hold it with your hand on the bars. That way if things get 'Ropey' (excuse the pun), you can take your hand off the rope and it will unwrap and go free.
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8 Nov 2011
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If the battery was completely dead I don't think you'd get it going just by solo pushing. If there was just not enough power for the starter motor but you had the warning lights etc then pushing would work - it has for me a few times (but with the help of a hill!).
It does depend what you're pushing though - if you're talking 600 single or similar, then I don't think you have a hope. Even with valve lifters and everything functioning on the engine I've never managed to bump start either of mine solo - the back wheel just locks up as soon as you drop the clutch. You need to add at least one other adult size person (or two kids!), get it moving in gear with the valve lifter in and then let go of that.
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8 Nov 2011
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I once had a battery fail on me during a trip on a DL650. It could no longer hold the charge, so some mornings, when it was below 0 C, I had to push-start the thing. Was really easy to do so, though, as it always fired on first attempt. But the battery wasn´t completely flat, just partially discharged.
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8 Nov 2011
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Ta for your experiences. I asked because I seem to recall reading somewhere that push starting an efi, even with a good battery, did not work - as if the engaging/spinning of the starter motor did something essential, electronically. But perhaps it's on certain models and I may have got it wrong.
Just remembered this old jump starting vid from the desert. Not an efi bike, just heavy.
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8 Nov 2011
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Something in the back of my mind says not to push or tow start vehicles (well, cars at least) with catalytic converters - which applies to most, if not all, Efi vehicles in original form.
I am not sure where the thought came from or the reason, but maybe raw fuel going through, until it fires, is harmful to it.
Or maybe raw fuel confuses the sensors in the exhaust.
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8 Nov 2011
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Maybe that's what I was thinking - it not advised - you're supposed to 'contact your authorised service centre'.
Perhaps raw fuel explodes in what might be a hot cat and scares the horses...
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8 Nov 2011
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My BMW Brick outfit with 11.5 V in the battery can be bump started. On a simple system where the only thing lacking is the power to turn the starter it works. If you have a CAN network screaming "low battery call service" into the engine ECU it could be rather different and it will depend on the programming so probably different from bike to bike.
You should not JUMP start an electronic engine, some AA type starters are basically welding sets and not good for ECU's
Andy
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13 Jan 2012
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Quote:
Originally Posted by Chris Scott
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Funny, I was just thinking of that attempted P/Starting video of your from years ago in the desert somewhere!!
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13 Jan 2012
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Check the kill switch
Once spent an hour pushing an XBR outfit through snow trying to bump it. It worked a lot better once the driver set the kill switch to run!
Andy
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13 Jan 2012
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Quote:
Originally Posted by Threewheelbonnie
Once spent an hour pushing an XBR outfit through snow trying to bump it. It worked a lot better once the driver set the kill switch to run!
Andy
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Love it!
Been there. done that (I guess we all have), but not for an hour!!
Slightly 
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14 Jan 2012
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Quote:
Originally Posted by Threewheelbonnie
Once spent an hour pushing an XBR outfit through snow trying to bump it. It worked a lot better once the driver set the kill switch to run!
Andy
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Could I guess who that might have been? 
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19 Nov 2013
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Quote:
Originally Posted by pecha72
I once had a battery fail on me during a trip on a DL650. It could no longer hold the charge, so some mornings, when it was below 0 C, I had to push-start the thing. Was really easy to do so, though, as it always fired on first attempt. But the battery wasn´t completely flat, just partially discharged.
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Kind of an old post, but do you recall which gear you put the bike in?
A couple of years ago I managed to bump start my V-Strom in first gear after several unsuccessful tries in second or third.
A few months ago I tried again to bump start the bike, in both second and first. I wasn't able to do it and had to pull out my jumper cables.
Jamie
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5 Aug 2014
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My bike is not EFI, just carbs - Honda Tornado XR250... it has an electronic start only...
... if the battery is completely dead, could this bike be started with a hillstart or run and jump? I never understood the mechanics of hill starting - can anyone enlighten me?
Cheers!
Rtw
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5 Aug 2014
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A Tornado would be easy to jump or hill start. Nice and light and old school - the golden era of jump starting, as shown above.
If the job of the kickstart or electric start is to spin the engine into life, then jump/hill starting is achieving the same thing by using the energy of the moving bike - wheel turning the chain turning the gearbox and so the piston - to fire it up. That is assuming the motor is generating enough charge to make a spark. With no efi to run, I am sure XR is
A good way to practise would be with a warm engine rolling down a quiet hill somewhere.
Whatever gear you're in, pull the clutch in and hold it in, then kill the engine with the kill button on the right bar - revs drop to zero but ignition is still on.
Bike is freewheeling. Now gradually let out the clutch, the whirring gearbox will engage with the clutch which will spin up the piston. Bike speed will hesitate a bit, then fire up and run as before. Now, see yourself doing that from a standing start with a cold engine. That is a hill start.
Lesson 2 is learning to do the same with a run and a jump on the flat. Not always so easy, especially with tall, big singles that are cold, as shown earlier, but a good skill to learn.
Ch
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5 Aug 2014
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Following Chris Scott's instructions you might need to add this bit.
Once free wheeling you will have to reset the kill switch on most bikes for it to work....... 
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