Question about 1990 Suzuki GSX-R 750 L
I have a 90 gsxr 750 it wont start but i do not have any exhaust gasket could this cause the problem to much back presser or is it something els
The exhaust gaskets really should have nothing to do with whether your engine will not start. However I assume that by not starting it is turning over smoothly like it should when you try to start, having covered that most motors will not start because no fuel, no spark, or no air not withstanding some major mechanical failure in the valve train or timing or piston, cranks et al..
Trying checking for the obvious first fuel, spark, air flow. then go from there hope this helps
Posted on Feb 12, 2009
Exhaust gaskets wont make your bike not to fire up, the gaskets are there to make the fitting of the exhaust pipes tight and not leak.
You will need to check on your bike the following:-
(1) If gas is in the float chamber or even if you pull out the spark plugs it should be wet with gas after several cranking.
(2) check if theres sparks at the spark plug, remove one of the sparkplugs and ground it thn crank her up and see if theres spark.
Knight. (Yamaha Seca XJ750A 1981) the same as XJ750R in USA
Posted on Feb 12, 2009
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Posted on Jan 02, 2017
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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.
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