Somthing is seriously wrong

[cp2008]

Right on my way home from work for the first 10 mins everything was fine when suddenly it started to smoke and instead of driving at 50 i was struglying to get 30 i could not get my bike to go above 30 it was smoking like mad with no power

My bike is a pugeout xps 50cc geared moped

For the last 2 months it has had a performance air filter,80cc malossi kit and doppler sports exhaust

When i removed the spark plug when i got home instead of it being mocca black it is looks like white charcoal you know that whitiy grey colour help ! please

and no i didnt leave the choke on

[cp2008]

please i need help

[Thom]

smoke would suggest oil to me, and if my science is correct, and i'll happily stand corrected, but when charcoal burns it releases carbon and then turns white. oil is carbon in a different form but i imagine it could burn to leave a white colour under the right conditions?

If not it could be coolant, when our old cavalier went to the scrappy in the sky it left because the coolant had gotten into the pistons and this was the result, white plugs.

Im not sure how much that helps but i'd check your coolant and oil levels.
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Current Bike: 1996 Yamaha TRX850 (The Japanese-Ducati One).
Previous Bikes: 1990 Honda NSR125 'Rothmans' (The smoking one), 1990 Suzuki GS500e 'Caf? fighter' (The loud one), 1987 Kawasaki GPX400r (The quick one), 1997 XJ600s Diversion (The reliable one), 2000 Kawasaki ER-5 (The spontaneously combustive one)

[cp2008]

well since i got home i drained and changed the coolant i dont think there is a problem there i disabled the 2 stroke oli pump and but some two stroke directly into the fuel tank to check incase the oil pump was pumping in to much oil and none of this has made a change it is still smoking like crazy and causing the plugs to go bright whitish charcoal colour

[The Artist]

Sounds like some sort of oil is getting in somewhere.

Is there plenty of compression?? Take plug out, put finger over plug whole and turn over slowly.

Could be running lean, which means wrong fuel mixture. This could overheat your engine leading to damage to gaskets leading to coolant going into the engine.

Other Possible causes : incorrect fuel mixture, wrong spark plugs, air filter leak, additives in fuel being burnt.

There is definately something being burnt in the cylinder which shouldnt be.

My guess is oil was wrong mixture which led to some sort of damage. If you fitted the bore kit yourself and didnt measure torques etc, gaskets may not be as strong and effective as before.

[The Artist]

On further thought and quick google...

Your plug could be running too hot either caused by wrong type of plug or running lean, (too much air, not enough fuel)

Or head gasket going. If you fitted yourself, may also be the cause

[Pete.]

Have you lost any coolant? I'd suspect the head gasket first-off.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[iooi]

Certainly a very weak fuel mixture by the sound of it and could also be a seized engine on the way very quick.
Could also be rings have gone on the smoke issue.

Time to strip and rebuild the engine.....
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Just because my bike was A DIVVY, does not mean i am......

[cp2008]

Right first off The bike has been working fine since it had the bore kit fitted 2 months ago when this was done the carb was rejetted and the oil pump was reset to increase oil flow

Are you guys seriously suggesting i strip the engine when there is good compression and nothing to suggest somthing has gone terribly wrong

[Rockhopper]

Is the smoke blue or white?

[Pete.]

There isn't a lot to go by unfortnately

Are we talking clouds of white smoke or stinky blue smoke?
Are you losing coolant?
Is it making nasty noises, ticking, squeaking etc?
Any other symptoms?

Smoke is usually wither burning coolant or burning oil. If it's coolant, suspect your head gasket, or perhaps water pump. If it's oil suspect your main bearing seals, but they only usually go with the bearings so you'd be getting rumbling or knocking sounds with that.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[cp2008]

Update No the bike is not loosing coolant i deciced to drain gear box oil as well that is fine no metal shards or anything out the ordianary just oil
I have cleaned the piston with petrol and it cleaned up like new

[img=https://img218.imageshack.us/img218/5303/13052008167gj7.th.jpg]

[img=https://img224.imageshack.us/img224/7909/13052008162er2.th.jpg]

[Ben.]

hmm it might have fucked your head gasket where the engines probably been getting too hot meaning coolants been getting in.
if you take it apart there will usually be a really obvious crack as the coolant basically steam cleans the hole.

if not check your carbs, they make the plugs go white if they letting to much air in.

But then ive never seen a spark or piston like that before...

do you use coolant or tap water?
____________________
follow my racing season
Race bike - R6
Road bike - sv650

[StealthDJ]

White deposits are, suprisingly, common. This site is quite useful:

https://www.theultralightplace.com/pistons.htm

If it's suddenly gone to running very rich, which looks to be the case, I'd make a guess that your main jet is currently sat in the bottom of the float bowl, having just fallen out. Wouldn't be the first time I've seen it...

Other than that, check your crankcase seals. They don't always go with the main bearings and will cause it to smoke like hell if they fail on the clutch side.
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Current garage: VFR800 FI-W | RD500LC YPVS | SV650 K2 | MZ TS250/1 | MZ ETZ251 | BSA WDB40
Previous notables: H100 S2 | CB250NA/B | CB250T | GT250X7 | Z650 B1 | SR650
Still owned, but long gone: RD250LC | CB750F2 SOHC | C50

[iooi]

[cp2008]

I stripped the engine last night no cracks in cylinder head or scores in the barrell or water where is shouldnt be a local mechanic recons either some1 has put somthing in my petrol or becuase i had been running it on one type of two stroke then when the tank was have empty filled it with a different type my oil pump may be blocked

[The Artist]

so was the head gasket fine?

borrow a compression tester and tell us what it is.

Also check the jet in your float bowl like stealthDJ said, i forgot bout that

[Pete.]

StealthDJ has made an excellent suggestion.

If your oil pump had failed you would be doing 3mph, not 30, because you would be pushing it home
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Rockhopper]

I think its burning coolant.