XT600E cutting out

[Mario_Kempes]

My commuter has let me down again.

After about 4 or 5 minutes on the motorway it started backfiring. This is usually a sign to switch to reserve but it has about 6 to 8 litres left in it.

Feel it dying - like no fuel was reaching the engine - and off it goes. Won't start again at first but I leave it for 10 and it starts fine.

Leave it on idle for 5. Revving it occasionally until I feel confident enough to try again. Sure enough it loses power again after 5 minutes.

Went through the cycle one more time before giving up and calling the tow truck.

It's getting on a bit and has a small oil leak. Had to buy a new regulator last year but it's always been mechanically fine.

Any ideas?
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2018 Speed Triple 1050 R
'65 Vespa 150S

[Itchy]

Vapour lock? I had that on my XT600E a few times in absolutely baking temperatures.
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Spain 2008France 2007Big one 2009 We all die. The goal isn't to live forever, the goal is to create something that will. In the end, your life will flash before your eyes. Make sure it is worth watching.

[Ariel Badger]

Is the vent to the tank clear? Try riding with the cap off (but try to avoid crashing, soaking yourself in fuel and going up like a christmas pudding).
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Bikers make great organ donors, get 115 on your licence today.

[Copycat73]

my m8 had one of these.. and explained to me how the mixture could be altered via the on board computer to make it tick over in the winter months cos otherwise it would cut out at the lights in the cold.. but he knew exactly what he was doing ... could the previous owner have messed with the on board settings ?
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Whatever I post I have no citation and no intention of providing one..
caveat emptor

[.....]

[Mario_Kempes]

Thanks for the help, gents.

I thought it was fuelling what with the backfire etc.

However, I tried it again this morning. Started no problem and then as soon as I put it into gear it shutdown.

Got to be the sidestand killswitch. Would that messing up mid-ride cause the backfiring and loss of power?
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2018 Speed Triple 1050 R
'65 Vespa 150S

[Mario_Kempes]

Kickstand it was! Lovely.
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2018 Speed Triple 1050 R
'65 Vespa 150S

[Ariel Badger]

89% of fuel problems are electrical and 89% of electrical problems are fuel. the other 2% are caused by holes in pistons.
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Bikers make great organ donors, get 115 on your licence today.

[Mario_Kempes]

Balls. Just leaving the city and it backfires and drops power. It's a fueling issue. I can see petrol in the tank, it's just under half full, but it's not reaching the engine.

Carb needs looked at.
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2018 Speed Triple 1050 R
'65 Vespa 150S

[chris-red]

[.....]

I don't know if you've had the carbs off before but due to the weird twin carb setup they can be a bit of a pain to get in and out.

The main problem I had was getting them seated in the rubbers when putting them back in. A bit of lube (oo-er missus) and they went back in a treat.

Remember to check the hidden filter as I mentioned earlier, you can buy carb refurb kits, useful for when you mangle the float valve seat getting it out of the carb.

[Robby]

If this is your daily commuter, then it is unlikely that the carbs have suddenly developed a problem. The only thing can happen quickly is water getting in - usually due to a poor seal on the fuel cap - in which case you can drain the carbs into a receptacle and look for evidence of water without having to take them off the bike.

I think your problem is more likely to be electrical, it fits with having a healthy battery and a dying reg/rec. The healthy battery regains about half of its charge overnight, the reg/rec isn't doing a good job of charging it - although it may still be charging at tickover.

Get your multimeter out and check the charging system, you should be looking for 13-14V at tickover, and 14-14.5V at 4000 rpm.

[Mario_Kempes]