White smoke

superstacker · Traffic Copper Joined: 20 Feb 2005 Karma :

This is a repost from bike chat, need help in identifying it!

So I finally get the bike ready to go out, nice respray job, ordered new screen, changed fork seals, ordered new chain and sprockets. New leathers helmet and everything....

Take the bike out this morning, get half a mile down the road and poof, big cloud of white smoke in my rear view mirror....

Eventually push the bike home and call out my home start insurance people. Bike gets jump started and no smoke for about 30 seconds then after that it continues to push out white smoke. Apparantly a problem with oil seals of some kind? Whats better, shops hate touching VFR nc24's!!!

just loving my luck!

ZRX61 · Victor Meldrew Joined: 05 Nov 2003 Karma :

It's burning oil....

Several possible causes:

1: If ya dumped the bike there may be oil in the airbox, have a look.

2: Valve guide seals are knackered

3: Rings are mullared

Thats enough to be going on with, if the airbox is dry do a leak down test to determine if it's rings or valve guide seals.

This is all assumig it's oil & not steam.. whats it smell like?

Hex · Party Boy Joined: 04 Feb 2002 Karma :

Are you losing coolant (is the water level going down)?
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stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

I would suspect the head gasket has blown allowing coolant to leak into the cylinder. Your white smoke would be steam.

I would assosciate oil with blue or black smoke.

So, as Hex says, coolant level going down? Any oil in the coolant? Any coolant in the oil (mayonaise on the sight glass)? Radiator hoses rock hard? Coolant bottle overflowing?
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superstacker · Traffic Copper Joined: 20 Feb 2005 Karma :

ok guys an update on the bike,

Drained the oil, no mayonaise, all as it should be, maybe slightly thinner but im not sure.

Took off the airbox, oil residue inside the airbox and on the filter.

taken out sparkplugs, left plug got oil on it, right plug hasnt.

Cranked the engine from the shaft, all pistons move up and down freely, will carry on stripping tommorrow.

any further ideas based on that?

ZRX61 · Victor Meldrew Joined: 05 Nov 2003 Karma :

superstacker · Traffic Copper Joined: 20 Feb 2005 Karma :

its definantly smoke, i can smell the difference between steam and smoke and so could my whole street and the seven cars behind me! Laughing

Ive been told im looking at worn piston rings or weak valve stem seals?

superstacker · Traffic Copper Joined: 20 Feb 2005 Karma :

ive been advised my an nc30 owner it sounds like the piston rings? Actually the manual suggests this as well. could be a good starting place? how worn would a worn piston ring look?

all help gratefully recieved!

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

Put it back together and sell it sharpish.

superstacker · Traffic Copper Joined: 20 Feb 2005 Karma :

ZRX61 · Victor Meldrew Joined: 05 Nov 2003 Karma :

ok, heres the ultimate bodge:
I assume this heap is a V4? if so....

pull the tank & airbox etc so you can see down the carbs. rig up some other fuel supply. fire the bike up & tip some Ajax (SLOWLY!!) down the carb attached to the pot with the duff rings. when it stops smoking the rings have re-seated & the problem is gone....

I accept NO responsiblity for any fuck ups or damage YOU do to YOUR bike.

superstacker · Traffic Copper Joined: 20 Feb 2005 Karma :

funnily enough my dad suggested a similar thing!

iCraig · World Chat Champion Joined: 05 Jun 2004 Karma :

You sure its not just condensation in the exhaust which forms at this time of year?

superstacker · Traffic Copper Joined: 20 Feb 2005 Karma :

Cog Head · Could Be A Chat Bot Joined: 21 Oct 2005 Karma :

gear box oil maybe, i drained my gearbox and re mesuded it today and found out that i had 300cc's toomuch in it and it was dripping out onto my exhaust and tyer
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stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

Might I suggest doing a compression test before going any further?
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

ZRX61 · Victor Meldrew Joined: 05 Nov 2003 Karma :

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

ZRX61 · Victor Meldrew Joined: 05 Nov 2003 Karma :

garry · Nova Slayer Joined: 09 Apr 2005 Karma :

piss funny Very Happy

aint head of that one since i was a kid ,, but trust me i,ve done it (20yrs ago) it may well cure your problem, for a short time ... long enough to sell it

like i said , it was the kinda trick i,d get up to many years ago. but i,d like to think these practices have died out now.......

sadly not heh Crying or Very sad

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Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

the grim reaper · World Chat Champion Joined: 29 Jun 2005 Karma :

What is this, bodge central? Next thing you'll be putting eggs in the rad and bananas in the gear box.

I'd agree with Stinkwheel, get a compression test done first. you may find that it's the head gasket between combustion chamber and oilway and it may not have damaged the head.

It could even be something more simple than that, oil ring gone maybe, who knows?

You'll probably lose more tryin to sell it quickly than the cost of the repairs and you may end up with a very annoyed new owner returning with the dog you've sold him/her.

Cheers

Grim
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satans_BIG_helper · Nearly there... Joined: 28 Dec 2004 Karma :

superstacker · Traffic Copper Joined: 20 Feb 2005 Karma :

Well, ive changed the plugs, poured a little redex into the holes as well. Put some redex into the carbs and put some in the petrol.

Also put a new battery on as it needed one.

Run the engine up and its idleing much better now and i got a little bit of smoke then it died off.

Took the bike down the road, and it is still running a little shite, but better then it was when it broke down.

It also kicked into the powerband which it wouldnt do when it broke down. I think the redex is doing its job still as its still kicking out some shite, gonna take it out tommorrow with my old man behind me so i can push the rest of the shite out the engine.

Hopefully the rings wont need doing but ill find out tommorrow how its running.

thanks for your help so far everyone!

lee

firefox · World Chat Champion Joined: 20 Oct 2005 Karma :

when my bike threw white smoke out i usd red x and also carb cleaner for my jets and all the smoke stopped so u might of just got a carbon build up or oil residue hope you sort it, best of luck Thumbs Up