Why my bike continue emitting black smoke?

Question

When I start my scooter, a lot of black smoke is emitted out. Disgusting! The pedestrian nearby ran away. Why my bike continue emitting black smoke?

2-stroke engine. But the smoke is really horrible! Once I turn the key, it starts emitting black smoke.

Answer 1

Sounds like you might have burnt rings.

Answer 2

If its a ninety six then there's a good possibility that this is basically soot. Diesel engines constantly throw out black smoke even while new. because of the fact of this this is a criminal requirement to have a down pointing exhaust. The faster on the audi diesels are very quiet so it must be which you're basically no longer listening to it. force it tricky in the time of the gears and you ought to sense a distinctive pull at approximately 2 and a 0.5 thousand revs. besides the shown fact that, on a motor vehicle of that age you're able to no longer get lots of a faster kick. That doesnt propose that the faster is long gone however, its extra possibly that the cam is worn from the automobiles years of provider. i could examine that for the period of the previous I checked the rest. word of warning however:- if the motor vehicle has executed any important mileage then the worn cam may be the only ingredient protecting the engine from blowing. positioned a clean cam on and you'd be extra possibly to apply the extra suitable skill and could land up blowing the engine simply by its age. Whoever informed you to apply any form of gasoline supplement or in gasoline cleanser grew to become into in straightforward terms attempting to help himself sell the stuff!

Answer 3

You might have a lot of unburnt oil/carbon in the exhaust pipe. This is caused by slow driving (not reving the motor to its fullest), choke left on to long (or damaged if it's automatic) or worn cylinder and piston & rings.
First try to clear the muffler. Put the scooter on the center stand and rev it to the max, until the smoke clears up (ocasionaly let off of the throttle to allow the engine to cool a little). Be careful not to let the rear wheel touch the ground. Apply the front brake and be ready to hit the kill switch and rear brake for safety. When it gets close to clean, ride the scooter at full throttle to keep the engine from overheating.
If no change, then it'll probably need engine work.

Answer 4

the carb is running too rich. a too rich condition is more fuel than air. having a plugged air filter will reduce air flow, and will cause it to run rich. this is an air/fuel mixture problem. if the plugs are coal black, it confirms it, and the plugs are fouled out. u'll need a fresh set of plugs properly gapped.
also, u dont need to run the choke long after u start the bike. runnin the choke will also cause a too rich condition for normal operation. blue smoke coming from the pipes is caused by too much oil in the oil/fuel mix. u might also not have enough oil in the gas...been a long time since i dealt with 2 strokes.

u'll need to adjust the mix at the carburator if the air filter is good. gently seat both jet screws, then give each one 1 1/4 turns out. start it up and if it runs smooth, leave it. if not, slowly give the slow speed jet a bit more turn out until it runs smooth. the high speed jet u'll have to play by ear since this 1 operates under higher rpm's. change and gap the plugs, and check air filter before doing this. spark plug color should be a light tan if its dialed in right. coal black, too rich. paper white, too lean.
if this bike doesnt mix the oil on its own, i prefer to pre-mix 2 stroke fuel. i put the oil in first, then add gas, shake for 2 minutes to blend it. it's better that way

Answer 5

You should provide more information about the bike. The simplest answer is it sounds like you're getting oil into the cylinders which causes the smoke. How's your oil level? If it doesn't stay the same, you may need to have the rings done (can be expensive).

That's just one possible problem. You should take it into a shop for a quick diagnosis so you know what the issue is.

Answer 6

unburned oil has accumulated in silencer? A good long, fast ride might clear this out.

if you have a separate tank for the oil then the mixture is set too rich. (This is a job for your mechanic/dealer)

if you put oil in with your petrol then either you put too much in or it is not mixed properly and has settled to the bottom of the fuel tank.

it is important to get the correct mixture and to use the best quality 2-stroke oil which mixes easily.

Answer 7

Pre mixed at the wrong amount.
Carb running to rich.
If auto lube your pump could be set to high.
Bad rings.

Did this just start with your last fill up. If so try changing your brand of oil. Also do you mix your own fuel and oil or is it auto lube?

Answer 8

Black smoke is an indicator of oil in the combustion chamber. On a two-cycle engine, this is normal, but I do not know what engine you have.

Answer 9

There are a couple of things it could be and neither of them are serious. First I would change the spark plug (or plugs) and secondly, your carburetor could be running too rich, so a simple adjustment to correct that should solve your black smoke problem.

Answer 10

Possibilities :
1. your fuel is adulterated
2. your engine is not tuned.