My CBR125 dies unexpectedly

hugbug · Derestricted Danger Joined: 31 Dec 2013 Karma :

Hi guys,

I was hoping you could help me out with a problem I am having a problem with my bike.
I own a 2010 Honda CBR 125 (fuel injected) with 11k miles on it. It was serviced by the dealer on the 3rd Dec 2013.

The bike started dying on me in the past few weeks - at first it wouldn't start sometimes and now it cuts off while i ride. Today when I was riding at 40 mph the bike just cut off and then wouldn't start. When I pressed the start button the FI light would come on and when I took my thumb off it it would disappear.

Once I got to a clear stretch of road I put it into second gear and bump started it and it worked. Thats why I am baffled as to what could be wrong. I don't want to take it to the dealer as they charge £60 for an hour which is a bit much for me at the moment.

So far this this is what I have done:

>Check the fuel lines and fuel cap
>Ensured that theres a vacuum in the tank
>Added Redex to the fuel as I thought the injectors are dirty
>Check the breather hoses
>Check the fuses

Please could you tell me what the possible cause is and how I would repair it?

Thank you.

P. · Red Rocket Joined: 14 Feb 2008 Karma :

Your battery? Checked the leads are done up tight, no corrosion, is it charged and/or charging correctly.

_Iain_ · Banned Joined: 01 Feb 2012 Karma :

As Paddy's said, i'd be looking at the battery condition & probbably also having a bit of a poke round the fuse box/wiring connectors round the motor. Possibly adding a bit of WD40 if i had it to ensure the connectors stayed water free Thumbs Up

____________________
Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

hugbug · Derestricted Danger Joined: 31 Dec 2013 Karma :

perri1996 · Borekit Bruiser Joined: 27 Dec 2012 Karma :

I'm not 100% sure on how it is with the CBR 125 but the CBF 125's have a common fault of the fuel pump not working. I bought a 13 plate and the fuel pump went on me in a couple of weeks but seems like the same problems take the to the dealers and ask them hopefully they will have a cheap easy fix
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Current Bike : Honda CBF 125 Old bikes: Derbi Senda Xrace/ Derbi Senda Xtreme.

P. · Red Rocket Joined: 14 Feb 2008 Karma :

Won't be the pump otherwise you'd have a massive recall, 1 model isn't nearly enough for Honda, clearly. Laughing

hugbug · Derestricted Danger Joined: 31 Dec 2013 Karma :

I have checked the wiring for any kinks or cuts and applied wd40 to the battery terminals to eliminate water.

Paddy, I think you were right that this is an electrical problem. Yesterday I was riding in the rain and at stop lights when I pulled the clutch in the bike kept cutting off. This happened several times yesterday until it stopped raining. Was embarrassing when I had to bumb start it in the Tesco car park.

Thinking about a "ghetto" fix, covering the battery and wiring with a plastic bag, would that be ok?

_Iain_ · Banned Joined: 01 Feb 2012 Karma :

P. · Red Rocket Joined: 14 Feb 2008 Karma :

Where are you from? If its Kent i'll likely be able to help. I've owned too many CBR125s Laughing

Clutchy · World Chat Champion Joined: 08 Nov 2011 Karma :

Robby · Dirty Old Man Joined: 16 May 2002 Karma :

If the wiring from the ignition switch is routed wrong it can get pinched by the steering lock, then short out on the headstock. All of the electrics suddenly die as if the key had been removed.

hugbug · Derestricted Danger Joined: 31 Dec 2013 Karma :

guys thank you for helping me out! really appreciate it.

I crashed my bike today (lowsided) and broke my right wrist:(

The whole front cowl part is gone apparently. Will get the bike back this or next week and check out the damage then.

Won't be biking for awhile now Sad

Clutchy · World Chat Champion Joined: 08 Nov 2011 Karma :

GWS mate

____________________
Malaguti F12 Phantom-Dead, Suzuki AY50- Dead, NRG power DD LQ, CBR125.
*33 BHP restriction up on 10/12/14* Current bikes/car: SV 650 S/ MKIV GOLF
Guide to pass your test with no lessons!

hugbug · Derestricted Danger Joined: 31 Dec 2013 Karma :

hugbug · Derestricted Danger Joined: 31 Dec 2013 Karma :

Got the bike back today whole front end is gone + side fairings. Might convert it to a street-fighter. Engine starts, but revs to 9k on its own with no throttle input.

https://i41.tinypic.com/21kvxnd.jpg[/img]

Handle bars folded in.

https://i42.tinypic.com/20r78ev.jpg

Helmet saved my face - still handsome as ever Smile

https://i41.tinypic.com/10qcq5f.jpg

Also doctor said I need surgery to my wrist, they are putting a plate in Sad

No riding until summer now!!

P. · Red Rocket Joined: 14 Feb 2008 Karma :

Don't do a bad job of it...

Here is mine - https://i55.tinypic.com/qn4cx4.jpg

Laughing

hugbug · Derestricted Danger Joined: 31 Dec 2013 Karma :

P. · Red Rocket Joined: 14 Feb 2008 Karma :

Fuck that, it was slow and shit, I got a new bike. Laughing

Don't get twin lights, buy yourself a single 7 inch round light. Even better, fix it to its normal standard.

Clutchy · World Chat Champion Joined: 08 Nov 2011 Karma :

Throttle cable is probably snagged if it's reving to 9k on its own
____________________
Malaguti F12 Phantom-Dead, Suzuki AY50- Dead, NRG power DD LQ, CBR125.
*33 BHP restriction up on 10/12/14* Current bikes/car: SV 650 S/ MKIV GOLF
Guide to pass your test with no lessons!

drzsta · World Chat Champion Joined: 20 Apr 2009 Karma :

this was my sexy steed Cool

https://i184.photobucket.com/albums/x254/FearThis-AK/IMG_5782.jpg

https://i184.photobucket.com/albums/x254/FearThis-AK/IMG_5783.jpg

hugbug · Derestricted Danger Joined: 31 Dec 2013 Karma :

Does anyone know where I can order the parts from?

If I get it from the dealer the fairings alone will cost me £200.

Don't know how much the headlights are and a new dashboard and front headligh frame (old one got bent)