27th Nov 2006, 13:07
1991 and later CB750 Nighthawks use an electronic tachometer. There is no "cable" to spray cleaner or lube into since it uses wire. Problem with these model year NH tachs is a "cold solder" (bad) joint at one of the clock springs internal of the tach. To repair the tach requires cutting open the internal case. I have done this. It is not easy, but not impossible.
17th May 2008, 00:20
I just bought a 1991 Nigthawk CB 750 yesterday (5/15/2008) to be used as second bike. Have same problem as others with tach. Also seems to be going faster than indicated on speedo. So far very impressed with 17 year old motorcycle. Has 19556 miles; will be using to commute 70 miles one way a week. Feel confident it can handle the task. Any more info on tach will be appreciated. Thanx Jalopy.
5th Jun 2008, 20:02
These are the best all around bikes ever made, but forget about the tach. The cable end wears down and you will always be replacing it. You need it about as much as the fuel gauge. Which we all know it does not have.
I have found the bike performs better if you stay out of the top end of any gear. Shift early as your owners manual states and let the engine work in its comfort zone. You will get there just as quick.
I have over 30,000 on my bike. New chain and sprocket a set of brakes, changed the oil in the spring and fall. It still runs like new.
26th Aug 2008, 07:14
Don't replace it! The problem is not a problem with the gear, it's the shifter. The same thing happens to me when I don't mesh the gears and it's embarrassing but I live with it. Rock your toe and wriggle the second gear in place, then release the clutch slowly. It's not meant for speed shifting and it's part of the charm.
22nd Dec 2008, 06:51
I had a Honda Shadow 700 and loved it. Ended up trading it for a Russian Command Car (Jeep) and regretted it. Now I am thinking of buying a 1992 750 Nighthawk. It is being offered for $3200 - I should add I live in Cambodia.
The bike is in good shape, but I think the price is a bit steep.
Any comments?
26th Mar 2009, 02:12
I am about to buy a 1993 Nighthawk with 40K miles, needs tires, clear-coat on tank flaking, seat immaculate, front spring may be soft. This bike should go forever! I am paying only $1500, which seems to be a reasonable price for that mileage, but the engine will go 100K+ miles without rebuild when maintained. Had an '72 500/Four, sold it with 70K miles and it was running like new.
15th May 2009, 16:09
I bought a 1992 Nighthawk with 14000 miles and now have 18000. I love this bike! It does everything; long tours, 40 mile round trip commute, fun just riding around.
I put on a new rear tire and replaced my sprocket and chain last year, and I feel we are ready for many more trouble free miles! Did I mention I get 50 to 55 MPG?! What's not to love?!
24th Jul 2009, 22:32
Just bought a '95 750 NH about an hour ago... Took it for a spin around the block before it got dark. 37k on the clock, new tires/chain/sprockets/seat and I got it for $1450. She runs and sounds sweet in her 1st mile to get gas.
Will change oil and filters, sea foam the carbs, oil the chain, check tubage and re-tighten all the bolts tomorrow morning. Then I think I'll put a hundred or so miles on it to get acquainted. Will let you know what I think.
Oh yeah... tach's DOA.
Kenwood.
9th Aug 2009, 18:23
I've had my 92 NH750 for 4+ years and it's now up to nearly 84K. In all those miles, only issues have been that the starter needed a rebuild, oil leak from valve cover gasket, and of course, the tach. Other than that, it's been tires, oil and filter change (every 3K), battery, and one chain replacement.
This bike has taken me on 300 mile day rides, around the corner to the store, and everything between. It can cruise all day at 80+, gets 40-50 mpg, is sit-upright comfortable and has never let me down.
I'd say I got my $2,000 worth. Wouldn't you?
25th Aug 2009, 15:25
I bought a 95 Nighthawk 750 about a year ago for $500, it had 37k miles on it so I changed the fork oil, brake fluid, oil and tires. I now have 51k on it and have changed a chain and sprocket set since. Other than a speedo light bulb and valve cover leak, it has run great. Also watch the starter switch; if it starts sticking, cable lube usually does the trick.
13th Oct 2009, 09:15
I acquired my black 1997 2 years ago with 8K miles on it. It now has 19K miles on it, and the only thing I have had to do is replace the rear tire, outside of normal owners maintenance. Everything works as it should and will still do 0-100 mph is about 13sec. Not that I do that often...
These bikes are very durable and are way underrated.
Even though it is now 10 years old, I still get repeated comments from people walking by on what a nice looking bike it is. The obvious replacement these days is the NT700V.

20th Sep 2006, 06:28
Awww come on, lay off the guy.
He probably just replaced the tach himself.