20 Most Recent 1984 Honda CB 700 SC Nighthawk Questions & Answers

Richard, I believe NGK recommends .035" gap. Check the attached links,instruction and guides for plug type and gap., Good luck "I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info." http://www.transcanimports.com/downloads/Motorcycle%20&%20ATV%20Catalogue/Electrical%20-%20Spark%20Plugs%20-%20Honda.pdf Honda CB700SC CycleChaos Part Finder Results

http://www.carlsalter.com/download.asp?p=1185

be very careful with the sounds that you describe, Sounds to me from the condition you describe without looking at it directly, May be that since the carbs leaking gas, over rich condition on cylinder 4, or a very bad job at setting the floats, Or a combination of both adjustment together

Loosen the banjo bolt on the clutch master cylinder, Put a plastic sheet and a rag under the banjo, pump the lever a couple of times till DOT 3/4 brake fluid starts pouring out past the sealing washers. You have now gotten the air out of the master cylinder. Tighten the banjo bolt, bleeding the lines should now be easy.

Did you take apart and clean the master cylinder. There is a large hole in the reservoir that feeds the fluid to the piston. But there is also a tiny pin hole that allows the dot fluid to return to the reservoir. If this is plugged on brakes it will lock the front wheel. On a clutch it might be what is locking the slave cylinder.If you pull the lever and the clutch does not engage you have air in the line. If you pull the lever and the clutch engages but does not disengage till you open the bleeder screw on the slave cylinder , the pin hole (fluid return hole) in the master cylinder is plugged. Take the master apart and clean it. You can pull the rubber cap that protects the piston out of the master and remove the piston with a circlip pliers. Honda sells a master cylinder rebuild kit and clutch slave o-ring seals if you need them.

Look at the connectors on the indicator wiring harness. The connectors are not up to Aviation standards. And a bike of that age will usually have corrosion in the connectors.

clymer makes repair manuals for hondas
I have used them and they are very good

contact www.BikeBandit.com

If this does not work contact your local honda dealer parts department they have repair manuals

here is a contact
www.BikeBandit.com

installing a petcock for CB700 Nighthawk S ORing in gas tank for petcock.  What size is it and how does is set in the fitting without falling into the tank?

there's sometimes a separate main fuse attached to the starter solenoid

Your motorcycle has hydraulic lifters that run off of oil pressure. Your valves never need adjusting. Now the problem, the hydraulic piston assembly that operates the individual valve can go bad . This will cause a loud clacking or clicking sound. If you have several bad lifters it sounds like your engine is full of marbles. Early models in 1983 had quite a few lifters that needed to be replaced. The Honda dealer knows how to test individual lifters to see if they are worn and need to be replaced. One other possibility, you could have a bad cam chain tensioner . That can cause an even clatter/clicking sound and can usually be installed through the top of the motor

soory about your trouble but it sounds like the yoke inside the starter itself is not engaging. If you know how or know someone that could take the starter apart and try to grease the yoke shaft so it can slide freely back and forth it should do the trick.

The solinoid is a possibility but a weak battery is more likely to be the cause.

pull the starter and check it by putting it on a testor or just hooking it to a good(known)battery. If it tests good then check/replace the starter switch and check wires to the switch.

The battery is good? have you tried a new one?

No alarm on the bike is there?

Mezo.

Hi,,,if it is a new battery,,then your regulator rectifier needs replacing,as this is responsible for charging the battery. if it is an old battery i sugest to buy a new one as its not holding its charge.

Sounds like external shift mechanism has worn out springs,replace them,if that does not work than your transmission shift forks are worn or bent,and or gear dogs are worn,in this case motor must be removed.