8th gen vfr800 wont start

2014 vfr800 fuel pump doesn’t prime and wont turn over. Also not showing what gear it’s in just blank lines

conwaychris626, 10/7/2023 at 12:31 PM

2014 vfr800 fuel pump doesn’t prime and wont turn over. Also not showing what gear it’s in just blank lines

How old is your battery?

First and foremost make sure your Battery is fully charged and healthy, any doubts, charge it and have it load checked, any good Automotive parts store will load check it for free. Battery terminal voltage is NOT a true indication of battery Capacity - it's ability to deliver plenty of cranking amps when starting. Also make sure the battery terminals are Clean and Tight.

Just curious, is your Neutral Light working? And, does the engine crank over with the SideStand UP and Clutch Pulled In? And.........is the Kill Switch set to RUN?

Let's know how you get on.

Battery is okay it doesn’t show nuetral but even with clutch pulled and kickstand up it doesnt try and do anything dash comes on but when you push the start nothinb happens and you never hear the fuel pump 

[post text not recovered]

Again IS the Kill Switch set To RUN, its easily overlooked?

And can you physically confim you are in Neutral gear?

2 minutes ago, Grum

Again IS the Kill Switch set To RUN, its easily overlooked?

And can you physically confim you are in Neutral gear?

Yes I even made sure to play with kill switch bike is in nuetral 

OK. Have you confirmed BOTH Fuses in the Sarter Relay are definetly good, Main Fuse A 30amp and Fi Fuse 20amp.?

Yes both fuses are good I even checked starter by bypassing relay and it worked when bypassed 

Ok, now Check the Start/Horn/Stop 10amp Fuse in the Left side Fuse Box, is it Blown?

Yea it’s blown

Just now, conwaychris626

Yea it’s blown

Ok lets hope it was just a random fuse fail. See what happens with a replacement. Good Luck.

I changed fuse as soon as I turned ignition on it blew it again 

Ok you have at least found the problem, a short somewhere. Give me some time to have a good look at the diagram. Do you have a multimeter, or a few spare 10amp fuses?

Yes I do if you can give me a idea where to start Thatd be great it may be tomorrow before I have time to troubleshoot it

Does the horn stop start effect it not starting?

23 hours ago, conwaychris626

Does the horn stop start effect it not starting?

Absolutely..........

Loss of this Fuse means No Kill Switch Power = A dead Engine Stop Relay and No power for the Starter Relay and all the EFI stuff.

It also messes with Starter Inhibitor Relays 1 and 2 screwing your Neutral Light.

And because your ECM is now unpowered there can be No Gear Selection readout, equals just a dash just as you have. And no Fuel Pump prime.

Have You in any way altered the angle of the Front Brake Switch assy OR fitted after market Brake levers?

I changed levers months ago but I can check the wires on the brake switch in the morning 

I changed to asv levers and haven’t had an issue I just moved and loaded it on a trailer just fine but once unloaded it wouldn’t do anything

2 hours ago, conwaychris626

I changed levers months ago but I can check the wires on the brake switch in the morning 

Yep, make sure that the brake switch wires/contacts are in no way touching anything metal, eg brake master cylinder or handle bar. This will blow that Fuse! Carefully check this.

And, because its happening without touching the brake lever it would have to be the Black/Red wire of the Brake Switch that was shorting to frame.

Failing a brake switch wire short,  you will need to measure the short to frame with an ohmeter at the Fuse Load Side terminal, then start removing items hanging off the fuse until the short indication hopefully disappears.

Good Luck.

Okay I will thanks I’ll lyk 

I cleaned brake wires then it started fine thanks, it ended up dying again but Atleast I know it’s something with that wire it I’ll play with it more on my next off day!

Let me just say Grum is an invaluable resource here-taking his time and effort to help others troubleshoot their VFR woes.  Kudos to Grum.