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My 2000 yz 80 2 stroke is leaking oil from the exhaust port on the head what could it be?

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Posted on Jan 02, 2017

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SOURCE: dripping black oil from exhaust to cylinder head joint

hi most 2 strokes leak from here ,but try using general purpose silicone bath sealant,it worked on my 2 strokes

Posted on Mar 25, 2009

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SOURCE: what oil should i have in yz 125 2 stroke

The clutch and gearbox share the same oil. The oil for the motor is 10w40. Stick with the major brands; Pennzoil, Quaker State, Mobil, Yamalube or Shell.

Posted on Apr 19, 2009

SOURCE: yamaha yz80 2 stroke or a4 stroke

2001 Yamaha YZ80 Specifications Engine Engine Type
2-stroke Displacement
83 cc Bore x Stroke
47 mm x 47 mm Compression Ratio
8.2:1 Engine Cooling
Liquid Carburetion Carburetor
26mm Mikuni Transmission Transmission
6 - speed Chassis Wheelbase
49.5 in Ground Clearance
13.7 in Seat Height
33.6 in Fuel Tank Capacity
1.3 gallons Forks Forks
33mm Kayaba Fork Travel
10.8 in Shock Shock(s)
Kayaba Shock Travel
11.1 in Wheels and Tires Front Wheel
17 in Rear Wheel
14 in Brakes
disk/disk Other Information Intended Use
Motocross Color Scheme
Blue Cost when new
$3199

Posted on Jul 19, 2010

SOURCE: engine oil in yz 250

all the yz250 needs is the pre-mix two stroke oil that you mix in with the fuel and also the transmission oil. the transmission oil goes in the filler cap which is located on the engine next to the kickstart on my 2002 yz250. this is for two strokes only. hope this helps

Posted on Feb 14, 2012

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1 Answer

Engin oil burnning


if its a 4 stroke engine then you have piston ring or valve seal or head gasket problem ! compression test 100 psi or more ! remove exhaust and pressure test piston and put some oil in exhaust port on valves with piston at top dead centre and look for bubbles and air leaking past valves , and listen for air passing into crank case which tells you if rings are leaking ( put oil on top of piston to cover the top ring the second time you test this to see if better seal on rings ) !

Feb 06, 2014 | 2004 Bajaj Caliber 115

1 Answer

I had my head ported out and now it leaks oil out where my exhaust mounts to the head is it safe to run my bike like that


It is not normal, The oil is coming from the engine lubrication system and it sounds as if you have not renewed the rocker cover gasket when the engine was rebuilt. Check the torque settings on the head bolts and that no oil is getting into the coolant.

May 22, 2012 | 2001 Yamaha YZ 426 F

1 Answer

Im trying to sort a friends 2002 rs125 that is completely powerless , it will not even pull up a 1 inch dropped kerb unless revved to half throttle , airfilter and exhaust are standard , jets are clean ,...


Not familiar with Aprilia but have 40 years on 2 and 4 stroke engines. Start with removing the exhaust system. If it is plugged up with mud the engine can't breath. The chamber may have an internal collapse as opposed to plugged up with mud. With the exhaust removed, check the exhaust port. It may be carboned up thus plugging the cylinder exhaust. I repaired a Yamaha 80 with that problem once. The port had gone from 1" x 1.5" down to the size of a pencil eraser. Be sure the gas is good and gas/oil ratio is correct. Is the head on tight; bad head gasket, water leaks? When was the last time the crank seals were changed? Needed crank chamber pressure may be getting past bad crank seals. Standard air filter, but is it clean so air can pass through? Check the ignition timing. Find the problem then rate my answer :-)

Jun 27, 2011 | 2002 Aprilia RS 125

1 Answer

My pw 80 has white smoke coming out of the exhaust


Yes a pw 80 is a two stroke engine, it uses two stroke oil to lubricate the engine, it enters by means of the inlet,mixed with the fuel and air, then once ignited it attomises to form a mist and lubricates the internals of the engine, the lubrication system of a two stroke is known as a total waste system, the oil goes in, lubricates,and leavs in the form of smoke, the smoke will be more noticable when the choke is applied, the problem would be severe if no smoke was visible, exsess smoke may suggest the exhaust, port, or silencer needs de cokeing, this would require removal of the exhaust and manualy remove obstructions, loss of power could be associated with this, good luck paul

Apr 29, 2011 | Yamaha G5 Motorcycles

1 Answer

I have a 1996 Yamaha yz80 that oil is coming out the exhaust pipe. I am running 40 to 1 ratio gas oil mixture. Any ideas what may be the problem?


Two strokes just leak oil especially where the pipe meets the motor you could try new oring but seriously only be worried if you dont have oil leaking from exhaust on a two stroke is rule of thumb

Apr 17, 2011 | 2003 Yamaha YZ 125

2 Answers

The muffler is all leak ing and gap 2 stroke oil leaking out


hi buddy they do leak oil from the exhaust but if there is no power its normally the piston rings gone i will tell you how to check this when i get home from work

Sep 17, 2009 | 2003 Yamaha YZ 250

2 Answers

Oil is leaking into cylinder, and running out the exhaust


sounds like the power valve seal is leaking where it goes into the cylinder from the side case.

Jul 07, 2009 | 2004 Yamaha YZ 250 F

2 Answers

Oil leak by exhaust pipe


I am not personally familiar with a 1975 DT250, but here is a general overview. If the bike is a 4 stroke, the oil you observed could have been from the exhaust, however it is more likely that it is from a leaky valve cover gasket or a head gasket. If the bike is a 2 stroke, the "oil" is from the exhaust (expansion chamber). It is excess 2 stroke oil that accumulates. You should reduce the mix to 32:1 or even 40:1 and replace the oring gasket in the opening of the pipe. If in a pinch you can use high temp silicone, but not a good way to go.
best wishes!

May 11, 2009 | 2003 Suzuki RM 125

1 Answer

Dripping black oil from exhaust to cylinder head joint


hi most 2 strokes leak from here ,but try using general purpose silicone bath sealant,it worked on my 2 strokes

Mar 25, 2009 | 2000 Cagiva Planet

2 Answers

Engine oil it top ov head on 2 stroke yz 80 im thnkin gaskets


Wash the bike then tighten down the cylinder head bolts.

Mar 15, 2009 | 2003 Yamaha YZ 125

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