Question about Motorcycles
Do i use gas and oil mixed together
Posted by Anonymous on
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Posted on Jan 02, 2017
DO NOT mix oil in the gas on your four stroke engine. You will foul the spark plug(s), build up deposits on the valves and head, and make a smokey, smelly mess. A two stroke engine uses the fuel/oil mix to lubricate the engine before being used as fuel. A four stroke engine has a separate lubrication system and does not normally burn any oil. As the name implies, a two stroke engine works in two strokes. The first stroke is downward, where the fuel/oil mix and air are drawn into the cylinder. The momentum from the crankshaft counterbalance or force from the other cylinder(s) drive the piston back up compressing the mix, and the spark plug sparks at or slightly before the top of the stroke. The rapid combustion of the fuel/oil/air mix drives the piston down, which is the power stroke, and then the cycle starts all over again. A four stroke engine has an intake stroke down taking in the fuel/air mix, a compression stroke up, a power stroke down as the fuel/air mix is ignited at or before the top of the stroke, and a exhaust stroke up before starting all over again. A four stroke is much cleaner and more reliable than a two stroke, but it is heavier and has less torque. A two stroke engine is much lighter and has more torque, but takes more maintenance.
Posted on Feb 28, 2009
If your not sure you could start with a 50 to 1 ratio if you notice a lot of smoke thin it out a little but the biggest part of adding oil to the gas is to keep the cylinders lubed. another thing lyou can do is check your spark plugs after a while to see what kind of burn you have.
Posted on May 03, 2009
two stroke gearbox oil, or four stroke engine oil,both are designed for use in the gearbox. has to state for motorcycle use on the label, as car oils can have friction modifiers that cause clutch slip, and dont be fooled into using automatic transmission fluid, some swear by it cause its thinner and good for the clutch , but the gears will wear faster, and eventually break.
Posted on May 05, 2010
SOURCE: my 95 xr600r dirt bike leaks oil
This hose should be connected to the air filter box.
It's for ventilation of the crankcase, much like the PCV (Positive Crankcase Ventilation) in cars. As the bike runs, the crankcase gets hot enough to vaporize some of the oil. And since there's always at least a little bit of combustion blowby in the cylinders, you get a bit of fuel/air thrown into the mix and an oil/fuel/air "atmosphere" in the crankcase, which isn't an ideal situation. So, when the hose is connected to the air filter box, it slightly vacuums off this atmosphere, letting the engine burn it and expel it through the exhaust.
If it's not connected to the airbox, the vapors can condense back to oil and just drip out.
If a lot of oil is coming out ("a lot" is hard to quantify), you could be getting excessive blowby because of a broken ring or cracked piston.
Hook that breather line back up to the airbox and unless the bike smokes excessively, I wouldn't worry about it.
If it IS hooked up, it or the airbox is cracked and needs fixing/replacing. If the breather line has somehow become plugged (mud-daubers are amazing at finding holes to makes homes out of), the pressure buildup could have split your vent line.
Posted on Jun 01, 2010
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