OP
UTC

Lurker
Nexus 250
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Posts: 4
Location: London, UK
 
Lurker
Nexus 250
Joined: UTC
Posts: 4
Location: London, UK
UTC quote
Hey guys. Forum Lurker here!
I'm having an issue starting my Gilera Nexus 250 (Quasar engine)

I was riding home one day and I stopped for 5mins to grab some food. Jumped back on the Nexus and it refused to start.
It wasn't turning over. Just a quiet click sound when you hold the brakes and press the starter.
The click sound comes from the fuel pump area.
Had to push it home.

I've charged the battery again. Still not working.

What I know;
- The battery is 6 months old and I fully charged it 2 weeks ago for winter.
- Battery was charging fine at 14.5volts while riding so reg & rect are fine.
- I've tried both keys (inc master)
- Immobiliser lights with the master key show ok.
- All fuses are fine.
- The bike isn't even trying to turn over.
- Fuel pump sounds fine when I turn the key.
- Brake lamps do light up when pressed.

I'd greatly appreciate any ideas of what to check and how.

Could it be the starter coil?

Gilera Nexus 250ie sp 2007
14,000 miles
⚠️ Last edited by P187 on UTC; edited 2 times
@jimc avatar
UTC

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
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Posts: 43890
Location: Pleasant Hill, CA
 
Moderaptor
@jimc avatar
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
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Location: Pleasant Hill, CA
UTC quote
The click you hear is the starter relay 'making' contact - or in your case not the 'making' bit, as probably the relay contacts inside have become pitted and dirty. You can open it up quite easily to clean them, but new relays are cheap enough. It could also be a bad -ve connection to the frame, or a bad crimp on one of the main cables to/from the starter relay, but the relay itself is the most likely culprit.
OP
UTC

Lurker
Nexus 250
Joined: UTC
Posts: 4
Location: London, UK
 
Lurker
Nexus 250
Joined: UTC
Posts: 4
Location: London, UK
UTC quote
jimc wrote:
The click you hear is the starter relay 'making' contact - or in your case not the 'making' bit, as probably the relay contacts inside have become pitted and dirty. You can open it up quite easily to clean them, but new relays are cheap enough. It could also be a bad -ve connection to the frame, or a bad crimp on one of the main cables to/from the starter relay, but the relay itself is the most likely culprit.
Hello JimC, thanks for the quick reply!
Could it be to do with this red connector?
It's seriously gopping! Looks like it's completely covered in oil? WTF.

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@jimc avatar
UTC

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
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Posts: 43890
Location: Pleasant Hill, CA
 
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@jimc avatar
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 43890
Location: Pleasant Hill, CA
UTC quote
Not the red thing in the middle of that picture - but see the two big red cables? That's where they join onto the starter relay, mostly hidden in the pic. Check they're clean and secure.
OP
UTC

Lurker
Nexus 250
Joined: UTC
Posts: 4
Location: London, UK
 
Lurker
Nexus 250
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Location: London, UK
UTC quote
jimc wrote:
Not the red thing in the middle of that picture - but see the two big red cables? That's where they join onto the starter relay, mostly hidden in the pic. Check they're clean and secure.
Will have to clean it up later when I have time to pull the panels off.
I'll be soo happy if this is resolved just by cleaning a friggin connector.
Might also zip tie some cable sheaf around it as bit of preventative maintenance.

Cheers pal. Will let you know how it goes.
@gtdespatchcourier avatar
UTC

Molto Verboso
GTS 300ie
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Posts: 1660
Location: Sunshine Coast, Australia
 
Molto Verboso
@gtdespatchcourier avatar
GTS 300ie
Joined: UTC
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Location: Sunshine Coast, Australia
UTC quote
Could be a failing fuel pump. Can you hear the fuel pump running when you turn the ignition on?
@roadster avatar
UTC

Molto Verboso
Kymco AK550
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Location: UK
 
Molto Verboso
@roadster avatar
Kymco AK550
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Location: UK
UTC quote
jimc wrote:
Not the red thing in the middle of that picture - but see the two big red cables? That's where they join onto the starter relay, mostly hidden in the pic. Check they're clean and secure.
You should check the starter relay just as Jim says.

It should be possible to operate the starter by shorting across the two main terminals, the heavy duty one from the battery and the heavy duty one going to the starter motor terminal, watch out for sparks though. If the starter still doesn't turn over then the relay is not the problem.

If the relay is OK then your next move should be to check the starter motor brushes. Try tapping the body of the starter with a small metal object, this will often move the brushes enough to get you going in an emergency.

The brushes on my 250 quasar wore out quickly due to oil contamination creating a sort of grinding paste in the armature housing.

Regards Roadster
@nomad68 avatar
UTC

Molto Verboso
Back on a 125cc!
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Molto Verboso
@nomad68 avatar
Back on a 125cc!
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Location: High Wycombe UK
UTC quote
Premises187?
Are you the legend from YouTube?
OP
UTC

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Nexus 250
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Location: London, UK
 
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Nexus 250
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Location: London, UK
UTC quote
Re: Premises187?
Some really helpful stuff here guys, thanks!
First I'll try using jump leads from a car to see if the battery is dud.

@GTdespatchcourier
The fuel pump does prime when I turn the key (sorry should have mentioned).
Spike68 wrote:
Are you the legend from YouTube?
Premises187, I am
Legend, naa. Just an idiot with a camera on a bike.
⬆️    About 3 years elapsed    ⬇️
UTC

Lurker
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Lurker
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UTC quote
Gilera nexus 300I not starting when hot
I had a gilera nexus 300i and I'm curious as for first time created a problem which is not clear at all what might causing this,it starts just fine when its cold.After i drive it for 5 minutes or more and gets to running temperature and i switch off the engine,when i try to start it again its spinning but not start the engine!! please help
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