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Discussion Starter #1
Hey!

The story:
I lost my license ages ago and so I haven't been riding my bike, however I wanted to start it/drive it down the road and back just to get the engine turning over. It hadn't been ridden in about 3 weeks.

Well, it turned over, but wouldn't start. So I thought, pfffft no problem, I'll push start it. Now you must realise, I live on the side of a valley, so there's a brilliant hill right outside my house. So I get going down this hill, drop clutch, engine turns over but just engine breaks and stops the bike. Try again.
Nothing.

Try again.
Nothing. :dodgy:

Did that for a while. Didn't get anything out of it.

Anyway that was on Saturday. Today I had some time and 2 friends over, we moved all my tools down to the side of the road where I'd just pushed my bike onto and set up shop.
We checked everything, fuses, coils, carbs, fuel lines, finally spark plugs.
Holy crap were the spark plugs oil fouled. Majorly oil fouled.
So, not having any transport to the nearest auto-shop, we decided we'd clean them.
about half a can of degreaser and a lot of wire brush scrubbing later we had some damn nice looking spark plugs. Doused them in petrol and chucked them back in the bike.

BAMN STARTS!
YAYYYYYY :D

So I ride it back up the hill, my friends and I go an eat celebratory pizza and play celebratory EUFA =D

So then about 30 mins ago I decide I'd take her for that ride up and down the road.
Try starting. Nothing.
Oh I'll just push start it down the hill.

Exactly the same problem!! :mad:

The questions:

How could the plugs have fouled so quickly!?
Zion Motorcycles on Oil fouled spark plugs:
"A spark plug shorted by excessive oil entering the combustion chamber is shown below. This is often caused by piston rings or cylinder walls that are badly worn. Oil may also be pulled into the chamber because of excessive clearance in the valve stem guides, or badly worn valve stem seals. If the PCV valve is plugged or inoperative, it can cause a buildup of crankcase pressure. This condition can force oil and oil vapors past the rings and valve guides into the combustion chamber."

sounds like pretty serious stuff.
so now I'm wondering how screwed am I?

I'm planning on putting new plugs in tomorrow, but after reading the zion thing, it sounds like I've got other things I should be worried about.
 

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how much oil is in the bike?
did it blow smoke?
 

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Discussion Starter #3
When I checked it before it was running (today) it was fine, and it didn't seem to be blowing smoke when it was running for that short time.
 

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It comes on sticks now? Or are you talking about human fecal matters ability to adhere to a variety of objects?

Sounds like a dead battery. Give it a charge then see what happens. Takes one variable out of the equation
 

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Discussion Starter #6
@Chrissybenn: but I've clutch started it before when the battery has been completely drained (couldn't even get the starter motor to click, let alone turn the engine over)
 

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Discussion Starter #8
then why wouldn't it clutch start when it has before, with a dead battery.
 

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Because it was totally flat.

Have you read the bike won't start thread?
 

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Discussion Starter #10
that makes no sense. The battery has way more juice than it did when I forgot to turn off the lights and then it still clutch started first time.

Ofcourse I have, did you even read my first post on this thread?

EDIT: "We checked everything, fuses, coils, carbs, fuel lines, finally spark plugs. Holy crap were the spark plugs oil fouled. Majorly oil fouled. "

Zion Motorcycles on Oil fouled spark plugs:
"A spark plug shorted by excessive oil entering the combustion chamber is shown below. This is often caused by piston rings or cylinder walls that are badly worn. Oil may also be pulled into the chamber because of excessive clearance in the valve stem guides, or badly worn valve stem seals. If the PCV valve is plugged or inoperative, it can cause a buildup of crankcase pressure. This condition can force oil and oil vapors past the rings and valve guides into the combustion chamber."
 

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low battery voltage has nothing to do with oil on the spark plugs.
 

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its flat, you clutch started it and you didnt ride it long enough to charge the battery... up and the down the street is not enough time to charge the battery dude.


mine had the same symptoms as yours, and i charged the battery.. it then started fine
 

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Chrissybenn said:
mine had the same symptoms as yours, and i charged the battery.. it then started fine
You had oil fouled plugs?

Guys, we can all jump up and down about the battery (I posted battery until I read the thread properly too...), but if the plugs are truly OIL fouled, then there's something non-battery related going on. How the hell can a flat battery OIL foul plugs?

Now, I want to see a photo of one of these oil fouled plugs...

Justin.
 

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im with sir.b on this one
battery could be a problem but shouldn't be causing the oil fouled plug

this means that the oil is in the combustion chamber
so it could be anything from piston rings to badly worn cylinder walls to excessive valve stem clearance
 

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Discussion Starter #16
Cheers for the responses guys =)

PLAN:
Tomorrow buy a compression tester, new plugs and jump leads (I was borrowing some today).
check the cylinders, change the plugs and jump the bike with a car so I'll be getting a nice lot of power.

Hopefully if everything goes to plan I'll report back here tomorrow
 

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http://www.cbr250.com/forum/thread-299.html
read before you jump start
make sure the cars not running if your gonna jump start from a car

EDIT: btw to charge a bike battery properly by riding, you have to ride for around 30mins to an hour
short 10 min trips discharge it more than charging it
so it could be dead

theres 2 different issues here
1 is the batter being dead
and the other is the fouled oil plugs
if you can start the bike again, try and rev it heaps and look at the exhaust
if its blowing smoke, its a good sign that its burning oil
im not sure if the same applies for bikes but blue smoke through the exhaust on a car is a definite sign of oil entering the combustion chamber
 

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sorry, all i saw was fouled plugs..
but reading it again, it doesnt look like zion motorcycles has told him he has oil fouled plugs, moreso that he has found that quote from them on a faq site or something.

did you check your plugs again after it wouldn't start the second time?
because it sounds like you may have fixed the fouled plugs but the battery may still be flat?

anyway, if there is actually oil on the plugs, ill stop commenting, because my technical expertise with the mc22 is non existant :p
 

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Chrissybenn said:
sorry, all i saw was fouled plugs..
but reading it again, it doesnt look like zion motorcycles has told him he has oil fouled plugs, moreso that he has found that quote from them on a faq site or something.
That's why I want photos :D

Justin.
 

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You need photos of the plugs as they are now.
I know it's a pain to get the plugs out again but just one will do.

How much oil is in the bike? If it has been overfiled with oil it will get into the airbox then onto your plugs.
Check the airbox for oil resedue and filter for being oil soaked, change it if it's dirty.


What did the plugs look like? Were they black and dusty?
 
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