Problem with the NC30

Deano · World Chat Champion Joined: 17 Feb 2003 Karma :

Right took my tank, air filter off last nite and found petrol in the air box tray. Now I know for a fact that petrol shouldn't be their. So does anybody know what might of caused it and what i have to do about making sure it doesn't keep happening.
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Dean Stone #777
EMRA 2012 final standings, Formula 600s 3rd, Superstock 600s 3rd.
www.triplesevenracing.co.uk: www.ljmotorcyclerepairs.co.uk www.gettaylored.co.uk BN RaceScience, Now officially run out of money to carry on racing Sad

Dr Nick · World Chat Champion Joined: 20 Jun 2003 Karma :

stop crashing it? Confused

.

andrew · Mister Road Rage Joined: 03 Feb 2002 Karma :

Could be a loose pipe on the tank??

WildGoose · White Van Man Joined: 20 Mar 2002 Karma :

i found petrol/oil crap in my airbox more than once

never worried about it personally, but then i sold it to some sucker, so Razz

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So in other words, he stopped you for being flagrantly in posession of a motorcycle in direct contravention of the Hippies, Darkies and People Whose Face I Don't Like The Look of (Police Powers) Act. 1976

MarJay · But it's British! Joined: 15 Sep 2003 Karma :

If its oil, it could be oil coming up the breather pipe which feeds into the airbox from the sump.
This is caused by one thing and one thing only:

Wheelies Very Happy

Stop wheelying is the answer to that.

If its petrol, then I'd be scared if I were you, cos if your tank has got a hole in it, you'll need to buy wa new one.
As Andrew said, it could be a loose hose, or it could indeed just be where you've taken the tank off, the hose has come loose and sprayed petrol into the airbox.

Find out if its oil or petrol. Stick yer finger in it, if it evaporates, its petrol, if not its oil. Cool

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British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F; Cheap project: CBR900RR FireBlade
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.

EuropeanNC30R... · Gay Hairdresser Joined: 20 Jun 2002 Karma :

How much petrol are you talking about?

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

Traces of petrol there are fairly normal. Large amounts are not. Some oil will get blown out of the breather hose, the more worn the piston rings are the more oil will get blown out.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

G · The Voice of Reason Joined: 02 Feb 2002 Karma :

Craig_ · Trackday Trickster Joined: 06 Oct 2003 Karma :

Small amounts are known from shut off and other various theings... but flooded with petty isnt normal.
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VAG Cars - www.vagcars.co.uk - North East VAG Owners Club

Rossi_460 · Borekit Bruiser Joined: 02 Oct 2003 Karma :

You could go to 400 grey bike forum, problems like this will be answered no problem. Are you not a member of it any way???

Heres the link, https://www.400greybike.co.uk/forum/

MarJay · But it's British! Joined: 15 Sep 2003 Karma :

Deano · World Chat Champion Joined: 17 Feb 2003 Karma :

Right, it's definately petrol, a small puddle in the tray, I did connect the hoses properly and the bike has been sitting still for the 4 weeks. I'm gonna check holes in the petrol tank but dout that thats whats causing it. My guess is that the carbs are squirting too much petrol or something.

And Rossi I am already a member of Greybike (control-007)
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Dean Stone #777
EMRA 2012 final standings, Formula 600s 3rd, Superstock 600s 3rd.
www.triplesevenracing.co.uk: www.ljmotorcyclerepairs.co.uk www.gettaylored.co.uk BN RaceScience, Now officially run out of money to carry on racing Sad

Kickstart@Work · Scooby Slapper Joined: 26 Sep 2003 Karma :

Hi

What happens is that the inlets to the carbs are a tuned length, and at certain revs the airflow will go through the carbs but then back through again in the opposite direction (collecting fuel on the way). Sometimes you can see this with the engine running, with a smallfuel mist being visable before the carbs. Depending on what you do with the throttle some of this fuel can then drop out of the airflow and then sit in the airbox.

So a thin coating is not unusual. A puddle would be unusual. But I suppose that depends on the shape of the airbox, etc, and how long it would take to collect. Might be worth checking the carb breather hoses if these vent into the airbox.

All the best

Keith
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Atheism is a not for prophet organisation

Deano · World Chat Champion Joined: 17 Feb 2003 Karma :

Ok cheers, not something too much to worry about then but I'll certainly take note and try a few things so thanks guys.
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Dean Stone #777
EMRA 2012 final standings, Formula 600s 3rd, Superstock 600s 3rd.
www.triplesevenracing.co.uk: www.ljmotorcyclerepairs.co.uk www.gettaylored.co.uk BN RaceScience, Now officially run out of money to carry on racing Sad