Starting problems - 07 CBR125

[Mikeyspike]

Hey guys, Having a bit of a predicament with my bike.
Went to go ride it the other day, hopped on it in my garage and tried to start it but she wouldn't fire.

Tried to give it some gas as I pressed the button, still nothing.
took it outside and tried once again. Managed to start it however the engine cut out shortly after.

By this point the battery was fairly drained so I tried to bump start it. Managed to start the bike, but any time I'd'd give it any throttle, it would cut out.

So I put the bike back in the garage and left it for a bit. Came back later and had another go. Thought it could be a knackered battery as it actually started when bumping it, but just would hold out.

Later on the night, tried to jump start it from my mothers car, still no dice. Now I thought it had to be something else.

Next day, I went into my local mechanics and told them my situation, they said it could be the sensor for the FI has gotten damp or there could be some form of fuel starvation.

Can't take it to the mechanics as they're technically not insured to work over this time period and the earliest they could take a look would be the 6th of Jan.

Went out earlier and tried once again, just in case it was just some damp problem. still nothing.

Check the oil, level seemed a tad high, also smelt a little like petrol although looked relatively clean.

so yeah. I'm a bit stuck as of what to do. I plan on going to the local Honda dealership tomorrow and speaking with them to see what they say (apparently they have had a few people go with with the same model of bike and have this sensor issue). However, I'd like to see what you guys think.

TL;DR:
-Bike wouldn't fire on button
-when it did, it would cut out
-battery's now drained, so can't start from button any more
-bump starting it had more success then the button, but again, wouldn't keep at idle
-giving it any throttle would make it cut out when it did start
-mechs say possible sensor failure in FI system or fuel starvation.
-oil level a little high, smells like petrol a bit too.

Thanks guys!

[Northern Monkey]

Starter for 10.

Drop the oil out, and replace with fresh oil

Plug battery into charger. If you haven't got a charger, connect the jump leads from your car to the bike battery, turn the car on, and leave it 30 min while you have a cuppa. The car alternator will charge your battery.

Is there a spark? Check youtube for how to check, but involves removing the spark plug and making sure you don't electrocute yourself.

Is the fuel shitty? how long has it been in there, could it be contaminated?

[Mikeyspike]

[Copycat73]

I always had problems with spark plugs on 125cc bikes, put in a new one from a reputable source.
far to many hooky Chinese copies on evil bay net. and the like.
____________________
Whatever I post I have no citation and no intention of providing one..
caveat emptor

[Mikeyspike]

[Copycat73]

[Northern Monkey]

[Walloper]

If the bike has stood for sometime the battery power/reserve will drop. Over a month is not good for a battery without some sort of charger on it. It most probably will only have enough oomf to turn a cold engine over for a few seconds. If it doesn't fire then the next cycle could be the last chance on that battery.

Cold can allow dampness to soak into the engine which will mean any electrical energy in the ignition can leak to ground which reduces the power of the spark to ignite the air fuel mixture.

Engine oil in a petrol engine can smell of petrol as it is in contact with petrol products throughout it's time in the engine.

A 'Tad high' means? Where and how do you normally check the oil level? The position of the bike and any inclination of the surface will affect the 'gauged' level. It is allways suggested you do your regular oil level check in the same location with the bike as the OEM instructs. On side/centre stand or held level by a gay mate/your mum/dad or woteva.

Charge the battery overnight.
Check the oil level AS PER THE OEM INSTRUCTION.
Turn the fuel cock (if fitted) to On
Set the Choke (if fitted) to the Cold Starting Position (This partially closes off the air which passes through the carburettor/engine which has the effect of increasing the fuel in the air/fuel mixture) If fuel injected, there will be some other 'enrichment' device usually another injector valve.
Turn on Ignition.
Check bike is in Neutral.
'Crack' the throttle open about 1/8-1/4 of a turn from closed.
Push the starter button until the engine fires.
When it fires release the button and jiggle the throttle a little (if needed) to keep the engine running.
As the engine warms up the idle speed should increase.
As it gets to a fast tick-over (idle) you should 'open' the choke to the normal running position.

This sort of problem is prevented by a good maintenance regime.

Keep the electrics clean and dry.
If you suspect dampness in the electrics then spray it with WD40.
____________________
W-ireless A-rtificial L-ifeform L-imited to O-bservation P-eacekeeping and E-fficient R-epair

[Mikeyspike]

[Mikeyspike]

[Walloper]

Iridium electrode plugs are better. I have them fitted to all my bikes and starting performance is notably superior to the 'standard' copper core. Never had any problem with fouling.

Some interesting Guff on here. Cheap plugs too.

https://www.gsparkplug.com/shop/
____________________
W-ireless A-rtificial L-ifeform L-imited to O-bservation P-eacekeeping and E-fficient R-epair

[Copycat73]

[Walloper]

[Copycat73]

[Walloper]

[Copycat73]

[Walloper]

[Copycat73]

[Walloper]

[salem1987]

check the vacuum hose from the fuel tap to the bike also.
My first road bike was a cbr 125 i bought as a non runner, and it turned out it was just a bad hose.

[gavcarter]

A huge amount of 2005 models where recalled with shitty ignition coils and most had the same sort of symptoms, check your spark is good and strong.

[MartQ]

Sounds to me like you have had some dirty fuel.

Dirt got under the float needle in the carb causing the fuel to constantly fill up the carb which will eventually make its way through the cylinder, past the piston rings into the oil - hence oil that smells like petrol.

It also seems that some dirt has got into the carb jets causing fuel starvation, hence it stalls when you rev it (you may find that if you can manage to get the engine warm, it will rev a bit better).

Easy remedy is remove the carb, dismantle the jets and give them a good clean with carb cleaner solvent, re assemble and fit an £1.99 fuel filter in line with the pipe from the tank to the carb. Ditch the fuel from the tank (save it for the lawnmower or for cleaning bits & pieces) and refill with fresh fuel.

[Walloper]

[MartQ]

[Walloper]