RiderSite.com Forum Index RiderSite.com
[v4.2]
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Intermittent slow speed cutout

 
Post new topic   Reply to topic    RiderSite.com Forum Index -> Falco
View previous topic :: View next topic  
Author Message
spiderwheels
Clubman Racer
Clubman Racer


Joined: 14 Jan 2014
Posts: 351
Location: Cambridge

PostPosted: Sun Sep 30, 2018 8:10 pm    Post subject: Intermittent slow speed cutout Reply with quote

My old Falco is upset about the new Falco so it's decided to develop an intermittent cut-out. It only happens cuts out at slow speed. Junctions and mini roundabouts are a favourite. Hot or cold doesn't seem to matter. If it's got enough momentum it will bump itself straight back to life, otherwise it fires straight back up with a press of the starter.

So far I've blanked off the side stand switch and swapped fuel pumps (actually complete fuel tanks but that's another story). It was perfect for the first ride following the side stand switch fix.

It may be a coincidence but it seems to have started around the same time I fitted a new battery (genuine Yuasa). The connections are clean and tight - at least at the battery end.

What to look at next?
_________________
Real bikers don't have signatures
Back to top
View user's profile Send private message
fatboy
World Champion


Joined: 03 Nov 2011
Posts: 3425
Location: BATH

PostPosted: Mon Oct 01, 2018 6:12 pm    Post subject: Reply with quote

May be a long shot but try disabling the fuel cut off/tilt switch .
All you have to do is stop the sliding contact from sliding, can be done with tape or bits of tubing....
I have had a few fail on me and cause similar issues .
Also look for any wiring insulation fails between engine and frame rails,good luck and hope it's not too painful
_________________
Cleverly disguised as an adult !
Back to top
View user's profile Send private message Yahoo Messenger
DavShill
SuperBike Racer
SuperBike Racer


Joined: 16 Jan 2007
Posts: 1714
Location: Beverley, East Yorkshire

PostPosted: Thu Oct 04, 2018 11:43 am    Post subject: Reply with quote

I had an intermittent "cut-out" problem. It took ages to identify. It turned out to be a poor connection in the white block connector in the power line to the fuel pump. Left hand side under the tank. I simply had to pull the connecter apart and prise the pins open a little to make a better connection.

Worth a look?
Back to top
View user's profile Send private message
spiderwheels
Clubman Racer
Clubman Racer


Joined: 14 Jan 2014
Posts: 351
Location: Cambridge

PostPosted: Thu Oct 04, 2018 8:44 pm    Post subject: Reply with quote

Yes definitely worth a look thanks. How did you figure out it was that connector?

I've checked the tilt switch. However, I can rule it out because if I cause it to trip the bike won't restart without cycling the ignition off and back on. If it cuts out it restarts on the button.
_________________
Real bikers don't have signatures
Back to top
View user's profile Send private message
Firestarter
Twisted Firestarter


Joined: 04 Jan 2007
Posts: 1387
Location: Northwich, Cheshire

PostPosted: Fri Oct 05, 2018 6:35 am    Post subject: Reply with quote

spiderwheels wrote:
Yes definitely worth a look thanks. How did you figure out it was that connector?

I've checked the tilt switch. However, I can rule it out because if I cause it to trip the bike won't restart without cycling the ignition off and back on. If it cuts out it restarts on the button.


You can run without the tilt switch completely, just disconnect it. You'll get a flashing EFI message, but the bike will run without it. Can then figure out if you still get the cut-out and re-connect (or replace) the switch
_________________
Aprilia SL1000 Falco '04 in Black & Red
Back to top
View user's profile Send private message
DavShill
SuperBike Racer
SuperBike Racer


Joined: 16 Jan 2007
Posts: 1714
Location: Beverley, East Yorkshire

PostPosted: Fri Oct 05, 2018 2:27 pm    Post subject: Reply with quote

I noticed that the fuel pump was not priming with the tank in the lifted position but as I lowered the tank the connection made good and the fuel pump primed.
Back to top
View user's profile Send private message
spiderwheels
Clubman Racer
Clubman Racer


Joined: 14 Jan 2014
Posts: 351
Location: Cambridge

PostPosted: Sun Oct 14, 2018 12:52 pm    Post subject: Reply with quote

I found a poorly crimped bullet connector on the blue/grey wire to the engine stop relay that I suspect is the issue. That would be a like hitting the kill switch.

I think the bullet is due to the partly disconnected datatool alarm that's always been in there. I took the opportunity to rip the remains of that out too.

I'll road test it next time it's dry.
_________________
Real bikers don't have signatures
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    RiderSite.com Forum Index -> Falco All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group