CBF1000 => CBF1000 - General Discussion => Topic started by: Megalomaniac on 07 May, 2019, 07:02:01 PM

Title: Bike not starting up
Post by: Megalomaniac on 07 May, 2019, 07:02:01 PM
Hi all, first time posting and sadly not a good one.
Recently bought a CBF1000 off a nice bloke and its been running fine the last few months. Used as a daily commuter and less thank 30k miles on it.

Decided with the long weekend to wash it. As I went over the tank with the sponge I heard a slight "woosh" and the distinctive smell of petrol.
Since then she hasn't started up.

Thus far I've:
- Checked the fuses including the ignition and main fuse
- Recharged the battery more than once with a plug-in charger
- Siphoned out all of the fuel and added new fresh fuel (5l of octane 99 and 5l of octane 97)
- Added fuel cleaner and Wynns Dry Fuel to the new fresh fuel in the tank
- Checked all the wires and relays I can get access to via the seat or side fairings and nothing is disconnected or wet

Still no joy. I can get it to crank (I can hear the fuel pump cycles) but it just cranks until the battery is clearly going down.
Twice I've heard a slight 'pop' in the exhaust, and once there was proper firing for about a second or two but then it died.
I even tried roll starting it down a hill but I'm not getting anywhere with this.

I'm concerned it was water from washing that is now in the injector. I'm hoping the Dry Fuel will break it up and allow a start, but will leave that to do its work overnight now.
Has anyone had similar experiences? Especially with potentially getting water in the tank, or just something wet after washing the bike?

I can take the train to work but it's a real pain in the ass so would prefer to get her running soon.
The biked was serviced about 150miles ago and so is still in fresh condition otherwise.
Last resort is taking it to a service shop this weekend and asking them to do the rounds on filters, spark plugs and checking everything else.

Any suggestions, tips or miracle cure advice much welcome.

Thanks in advance
Title: Re: Bike not starting up
Post by: pedro on 07 May, 2019, 09:06:08 PM
I guess you have checked the filler cap and ensured it's secure (watertight).

1. Check the kill switch is in the run position (you might laugh - but I don't as a rule use mine and if you have washed it...).
2. Check fuses (done, I see).
3. Battery (done).
4. Check for a spark.
5. use an alternative fuel source.
6. Check pipes are all connected and undamaged.
7. Check side stand cutout switch.
8. Similar for clutch lever. (Can't think now, but there is one there - I think).

Hopefully it's something simple.

That's about it from my brain.
Title: Re: Bike not starting up
Post by: g5guzzi on 07 May, 2019, 09:23:49 PM
could the high pressure coupling in the fuel line have become
separated ? especially if disturbed while being serviced.
To check this i think you will have to raise the tank.
the only other idea i have is undo the fuel cap turn the ign on and listen
to hear if the pump builds up pressure or you can hear a gushing
sound in the tank indicating some thing wrong with the pump in the tank.

Title: Re: Bike not starting up
Post by: Megalomaniac on 08 May, 2019, 09:34:41 AM
Thanks both for the replies

Pedro, yup I've checked the kill switch, but very good point in missing something simple sometimes.

I'll check the cutout switches for the stand and clutch soon as I get home from work today. I suspect it isn't that since I have had some rumbling from the engine during the starting attempts. Could be a weak spark or fouled up spark plugs but it seems peculiar given that it had run fine prior to the wash and that now all cylinders would have the same issue.

Guzzi - could be the high pressure line. I'll lift the tank and take a look if it's connected and will also try your idea of the filler cap open to start. Will see if that helps.

Thanks both for the tips, I'll update if I get any progress tonight and welcome any further advice, thanks!
Title: Re: Bike not starting up
Post by: Megalomaniac on 09 May, 2019, 08:18:13 AM
Good news gents!
She's a starter this morning. Although with some difficulty and the need of some generous throttle. Rode the bike into work and will see how it starts this evening.

Conditions and performance on the ride in were perfectly normal.
Starting did emit some smoke, leading me to believe it was indeed the fuel and potentially water in the cylinders. Left it to run for 10 minutes before setting off to ensure everything had burned through.

Thanks again for your advice, I'll update this evening if everything is now sorted.
Title: Re: Bike not starting up
Post by: moayling on 09 May, 2019, 08:25:05 AM
This is not meant as a pun on the water thing but your symptoms sound as though you flooded the engine (petrol) Hope it starts ok now
Title: Re: Bike not starting up
Post by: Megalomaniac on 09 May, 2019, 10:14:48 PM
That's a pretty good pun though.
I followed the de-flooding procedure in the owner's manual a number of times just in case. I think you're right that at a point it must have been.

Rode home today and stopped off once too. Starts and runs fine but is still a little hesitant when firing up. I think if it flooded as you noted, could be a fouled up spark plug. I'll have all 4 changed as a precaution.

Thanks again all for the tips, and happy to be joining the forum.