Okay this isn't fare you didn't tell me what Suzuki Motorcycle but from what you did say about the oil in the air box I'm going to assume it's a V Twin cruiser type. I'll also assume you do a bunch of short hops and "cruising the strip" low reves putting along looking good. If I'm right with this assumption then I'm going to assume again that you have the rings stuck to the lands in the piston and you are getting some pressure build up in the crankcase, couple this with hot oil and you get a super fine oil mist which is sucked into the breather box. Stick your finger in the exhaust pipe and rub it against the side, if it comes out dirty with black dry carbon your are right it isn't coming out the pipe But if it's wet oily then you haven't been looking behind you (which is a good thing) when you are riding. and the oil is going out the pipe as well. If you have a ton of miles on it then it's a good time to have the top end rebuilt including pulling the barrels and clean up those pistons hone up the cylinders and install a new set of rings. Of course this is all an assumption that you have a V twin cruiser.
The most common cause of blue exhaust smoke is oil leaking past engine seals and into the cylinders where it then mixes and burns with the fuel. This is most frequently seen in older or high mileage cars with worn seals and gaskets. It only requires a very small amount of oil leaking into the cylinders to cause excessive blue exhaust smoke.
Blue exhaust smoke only at start-up can indicate worn piston seals or damaged or worn valve guides which may also cause a rattling noise. An external engine oil leak can drip onto hot engine and exhaust parts causing what appears to be blue exhaust smoke. Other possible causes of blue exhaust smoke include: piston wear, worn valve seals, a dirty or non-functioning PCV valve, worn piston rings, an intake manifold gasket leak, worn engine oil seals and possibly even head gasket failure.
Oil leaking into the cylinders can cause a rough idle, misfire and fouled spark plugs. In addition, a reduction in power and oil loss can be indicators that the blue exhaust smoke is caused by an internal engine oil leak. Internal engine oil leaks can also allow fuel to mix with the oil in the crankcase which will degrade the oil and prevent it from adequately protecting the engine.
Operating a car with a severely dirty oil filter, air filter or improperly functioning PCV valve can also sometimes result in engine oil blow-by, oil loss and blue exhaust smoke. Periodically checking the engine oil level with the oil dip stick will indicate if there is excessive oil consumption. Higher viscosity engine oil can sometimes temporarily reduce the amount of blow-by; however, this is not generally recommended. Excessive blue exhaust smoke indicates a possible internal engine oil leak that should be inspected by an ASE certified mechanic.
215 views
Usually answered in minutes!
×