Question about Honda CB 700 SC Nighthawk Motorcycles

1 Answer

I have a 1983 Honda Nighthawk 650. After I run the bike a while the oil lever drops out of sight on the dipstick. If I refill the engine with oil to the top of the dipstick that amount of oil will gush out of the dipstick fill hole when the engine cools. At first I thought that gas was leaking past the floats and into the crankcase. I also thought that the oil viscosity could be too high so I changed to 10-30 oil as recommended without any sucess. I've had a number of Nighthawks, Shadows,Sabres and a Goldwing and never had this problem before. I'm all out of ideas, can you help me ?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Honda Master
  • 7,768 Answers

Check under the valve covers to make sure the rocker/cam bay is draining properly back to the crankcase. Open any clogged holes. Aside from that possibility, I'm stumped too. :-(

Posted on Sep 09, 2010

Testimonial: "I would never have thought of that. Could the seal on the oil filter be bad and letting the oil drain back into the crankcase ?"

  • Jeff Turcotte
    Jeff Turcotte Sep 09, 2010

    Seems like the oil would have to go backwards thru the pump to get back to the crankcase, but I'm not familiar with the design of your engine, sorry. If it were my design, I would want the filter oil to drain back from the upstream side of the filter--that way you never have to worry that you are over- or under-filling the crankcase.

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My 1983 Nighthawk does not have spark while pressing the start button, but has spark after releasing and engine turns nother round. what could be the problem here?


This is a motorcycle question. Repost in motorcycles.

If it is like older electronic ignitions, it has a start and a run section. The start section can fail and the run section will still be good. Will it push start or does it have a kick start? Been a while since I had a bike.

Oct 05, 2012 | Honda 1983 Cb550sc Nighthawk 550 Ignition...

1 Answer

How much oil do i put in the engine


You should get an owner's manual for the bike. The oil capacity is stamped on the clutch cover - I believe it's 2.5L. You can also use the sight glass (bottom of clutch cover) to verify, but the oil level must be checked when the bike is level on the center stand, engine off.

Jun 19, 2011 | 1983 Yamaha XJ 650

1 Answer

What is the oil capacity for a 1992 Honda Nighthawk? How do I check the oil level?


To check your oil level , locate the large round clutch cover on the right side of the engine. With the motorcycle on the center stand unscrew the dipstick and wipe it off. Put the dipstick back in the fill hole till it stops but do not screw it in. Look at the level of the oil between the two marks. To change your oil you will need 4 quarts of oil, a filter, and a new aluminum drain plug washer. You can reuse the old one if it has not been squished out of shape. Your motorcycle comes from Honda usually with 10w-40 mineral base motorcycle oil. You can use any oil that is JASO MA certified motorcycle oil. 10w-40 for cold climate. 20w-50 for warm climate/touring. Car oils use different additives and may cause scoring in certain types of cam bearings. Do not use any oil that says " Energy Conserving " on the label . It will shorten the life of your wet clutch and transmission gears. If you choose Synthetic oils, they will help your bike run cooler and shift easier. Pour in three quarts of oil and add enough from the fourth quart to reach the high mark on the dip stick. You will probably need either 3.2 or 3.4 quarts to hit the high mark. Run the motor for a minute or two to fill the oil filter compartment with oil. Now recheck the oil level and top up as needed.

Jan 16, 2011 | 1992 Honda CB 750 Nighthawk

1 Answer

Where do you check the oil on 2001 honda xr 650


To get an accurate reading on your oil level , you have to start the motorcycle engine and run it for a at least 5 minutes longer if it is cold outside . A short drive works good. Then unscrew the dipstick on the frame above the tank , wipe it off , make sure the bike is level (upright) and put the dipstick back in till it seats(but do not screw it in). Now take it out and read the level. Top up as necessary but do not over fill. Use only JASO MA certified motorcycle oil. 10w-40 for cooler climates. 20w-50 for warmer conditions. Any oil that says Energy conserving on the label will shorten the life of your wet clutch and transmission gears. Synthetic oil help your bike run cooler and shift easier. 0w40 Amzoil runs great in my 1996 XR 400 Honda.

Oct 06, 2010 | 2001 Honda XR 650 R

2 Answers

1983 Honda Nighthawk 650 stopped starting


Sounds like the starter solenoid went bad. Turn the key on, Make sure it in N. Take a screwdriver and jump the terminals on the solenoid and see if it turns the starter over and starts the bike. If it does then the solenoid needs replaced.

Oct 01, 2009 | 1993 Honda CB 750 Nighthawk

1 Answer

How do i check my oil in my 1983 Suzuki Tempter Motorcycle ?


There is a sight window for viewing your oil level on the right side engine crankcase cover. It is in the lower left corner of the cover as you look at the engine from the side. With the bike sitting upright, the oil level should be visible in the window. You want to be able to see oil and free space both in the window. If you don't see oil, you will need to add some. If you don't see free space, use a friend to lean the bike away from the window and see how far past vertical he has to lean it in order to be able to see the level. If it has to be leaned quite a bit off of vertical, you should drain the oil and refill it with the proper quantity.

Sep 25, 2009 | 1983 Suzuki Tempter GR 650

1 Answer

1982 Honda 650 nighthawk; jumps and stalls when put into gear.


this may help,it doesnt sound like the clutch is out of adjustment,it sounds like the clutch plates have become stuck together,(this happens quite a bit if the bike has been parked for a while..ie over winter)..to fix it get the bike moving,down a drive way or something..then just bang it into gear,then shift into the highest gear you can by shifting without the clutch,once you have a bit of pace on simply hold the clutch lever in and work the throttle on and off all the while holding the clutch lever in,the clutch should free itself fairly quickly and should be back to normall,a lot of older bikes are good at doing this..hope this helps

Jul 05, 2009 | 1983 Yamaha XJ 650

2 Answers

Checking the Oil


Hi George,
Excellent description of your problem, I presume you are keeping the bike upright when checking the level on your dipstick?
I remember on some Honda's there used to be a Sight glass set in the Gearbox casing a small round Window with level marks up either side so when bike held upright the glass should be half full.
George! you should be able to see oil on the stick without running the bike so keep upright and top up as necessary.
Hope this helped, please remember to rate my effort?
Paul 'W'

Jan 23, 2009 | 1986 Honda GB 500 Clubmann TT

1 Answer

How to check oil on my bike


There are usually two methods to check the oil. One is a dipstick and the other is a sight-glass. You should have one or the other somewhere on the side of the engine crankcase. It should be fairly obvious and not require the removal of any body panels. If you can't find a dipstick in the side of the crankcase you will need to get down on your hands and knees and have a look for a sight-glass instead. This will be like a tiny window with a gauge against which you can check the level.

Nov 10, 2008 | 1983 kawasaki Csr 1000

1 Answer

Oil check


There are usually two methods to check the oil. One is a dipstick and the other is a sight-glass. You should have one or the other somewhere on the side of the engine crankcase. It should be fairly obvious and not require the removal of any body panels. If you can't find a dipstick in the side of the crankcase you will need to get down on your hands and knees and have a look for a sight-glass instead. This will be like a tiny window with a gauge against which you can check the level.

Nov 10, 2008 | 2003 Husaberg FX 650 e

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

366 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4514 Answers

yadayada
yadayada

Level 3 Expert

75066 Answers

Gino Cussen
Gino Cussen

Level 2 Expert

216 Answers

Are you a Honda Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...