Question about 1992 Honda CB 750 Nighthawk
I am loosing engine oil from my nighthawk, it's going into the airbox and affecting performance. I also occasionally get a bit of a clunking noise at low speeds/ low revs. the bikes only done 20000 and its always been serviced although it did sit unused for nearly a year, Hope someone can help, thanks.
It sounds like you got compression getting in your bottom end or a clog in a vent hose .check all vent hoses ,if its the first thing you need ring.sometime if it sits up the rings get stuck in the piston and wont reset
Posted on Sep 20, 2009
If your oil is loose, then tighten it.
But seriously, sounds like rings. You could do a compression check and see which cylinder is misbehaving.... but that won't really do you much good. Best solution is to route a longer vent hose up under the gas tank and put a filter on the end, as there won't be enough pressure to blow any oil out the end of such a long hose. Only gas will escape. Don't forget to cap off the hole in the airbox from the line you removed.
Posted on Mar 28, 2011
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Posted on Jan 02, 2017
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Engine Oil Recommendations
Use 4-stroke oil, or equivalent high detergent, premium
quality motor oil certified to meet or exceed U.S. automobile
manufacturer's requirements for API Performance
Class SF or better. SAE 15W-40 is recommended for general,
Engine oil is a major factor affecting engine performance
and service life. Non-detergent and 2-stroke engine oils will
damage engine and are not recommended.
• Be sure to use engine oils specified under "Engine Oil
It is very important to maintain proper level of engine oil to
keep engine in good running condition.
• Check engine oil level prior to each use. Refill engine
oil if oil level is low.
FIGURE 17: Recommended Oil Viscosity
Crankcase pressure can cause hot engine oil to
spray out of engine fill hole. Hot engine oil can
cause severe burns.
• ALWAYS stop engine before removing the oil fill cap.
FIGURE 18: Oil Fill Cap Removal
FIGURE 19: Oil Fill Measurement
Oil Capacity [qt / ml]
HW1000i 0.26 / 250
HW2000i 0.48 / 450
TABLE 4. Engine Oil Capacity
Mar 08, 2011 | Garden
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