-- Tachometer broke at 25,000, replaced it, the replacement broke at 40,000. This is a known fault on 90s NH's and very expensive to replace. Used ones go on eBay for $300!
-- Tach instrument light out (Other lights in the same shell work).
-- Didn't come with a center-stand. You can add one for about $100 and you need it.
That's it! Normal replacement of tires, chain, battery, oil and filter every 3K miles. Spin-on automotive oil filter easy to change out.
Fantastically reliable, as it should be, with an air-cooled 4 that has 30+ years of development in it.
Hydraulic valves need no adjustment ever... a big plus.
Performance in all aspects is middle-of-the-road, but plenty good enough for commuting, sport or touring.
"Standard" riding position lets you sit like a human being. No extreme lean either direction. You can't find this anymore. Very comfortable, even after hours in the saddle.
These bikes are cheap! You can get a great one for about $2500.
Other bikes are faster and more stylish (and way more expensive), but this is all the bike you'll ever need. Those who "trade up" from the Nighthawk later regret it.
You got totally nailed with the tacho repair guy. Yes you are correct they go out often. I have fixed mine by simply removing the cable at the tacho head and giving it a good lashing of brake cleaner. I have now done this twice over 35k miles. I say you got ripped, this is a well known fix. I suggest you find you another mechanic.
Awww come on, lay off the guy.
He probably just replaced the tach himself.
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.
I recently purchased a 1995 CB750 with 33,000 miles on it. The tach is dead... it bounces now and then. Can you go into any more detail on repairing this... or replacing it? I've looked on ebay every day for two months now...
A tach is a tach. Get a cheapo replacement and be done with it.
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.
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.
Has anyone experimented with a larger front sprocket or smaller rear one on the Nighthawk to lower final drive RPMs as speed? This is the only complaint I have about my baby since she has no 6th gear???
I am on a old CB 750 Nighthawk 1982. The old girl never let me down, and I can honestly not say one bad comment about her; she is every bit as good as my Kawasaki GT 550. Two great bikes; look after them. and they will look after you.
Note: A Comments RSS Feed 
is available.