10th Aug 2011, 16:53

I bought a 1980 CB900 with 53,000 miles, and it runs like a champ! For a four cylinder, your mileage is not uncommon! You will be fine!! Just adjust your cam chain tensioners at the interval suggested (every 5,000 miles).

10th Aug 2011, 16:58

Just shift through either high/low gears. There is on need to shift 2low/2high, etc. Just shift 1-5 in low or high. If you shift 1-5 low, you can shift to 5 high and get better gas mileage. Low gears are for mountain/towing. High gears 1-5 are for regular cruising.

10th Aug 2011, 17:04

That bike is a steal for 500 bucks!! Buy it and find some carbs on Ebay! They are very easy to take off and clean. Honda carbs are indestructible! Email me at ndhardy@gmail.com if you do not want to buy it! I will buy it!!

17th Aug 2011, 09:24

Does anyone know where to download the owner's manual for 1983 Honda CB1000C?

23rd Aug 2011, 12:21

I recently purchased one of these wonderful machines, and have the same upper noise. It seems to appear at around 3200, and is gone by 4500. What cured yours?

2nd Sep 2011, 10:49

I had the same problem, it may be two things, carb jets may be too big, or air filter may be too constrictive. I installed a K&N filter with +30% better air flow, and the bike's gas mileage went up, as did performance (bike now WANTS to go to redline). They are expensive, but they are cleanable, and you never have to replace it again. If you buy filter, make sure you also buy filter cleaning kit.

Cheers, Kevin.

26th Sep 2011, 18:08


I was wondering if you ever figured out what was hurting your fuel economy? I have a 1983 CB1000C, and it is getting poor fuel mileage. Any help would be appreciated.



9th Oct 2011, 09:31

I had a brown 1982 Honda CB900 Custom when I was stationed at Fort Gordon, GA back in that day. Traded it in on a new blue 1983 CB1000 Custom when I was sent to Fort Hood, TX, and loved them both.

Stumbled across a brown 1983 CB1000 Custom while online, for $1,500 that was near by, so what the heck, what to go see it yesterday. Very good shape, other than missing the right hand side cover. Having a '79 Harley FLH and a '08 Harley Ultra Glide, I don't need it, but I bought it for a fun project. I'm going to give it new life as a street bobber, not tourer.

It's been years, and looking it over, there doesn't seem to be a way to get rid of the right side shaft drive and convert it to chain drive on the left side, because of the cast integral transmission housing mounting, but we'll open it up and see if we can't do something somewhere. Not sure how am going to get that shaft drive and final drive to work with a rigid frame, but it looks as though will be able to go wider on the frame to envelope the final drive, if have a custom wider rear axle machined. Haven't decided if am going to go 2 into 2 open collectors, or 4 into 1 open collector.

I am going to have some fun breathing life back into this CB1000 Custom, as a T to T street bobber.

4th Nov 2011, 10:13

Hello, my 1983 Honda CB1000 Custom needs new diaphragm springs for the carbs; the others are worn out, and as they only made this bike one year, I am having trouble finding them, thanks. Or does anyone know of any other spring that would work?

24th Feb 2012, 07:16

Hi, one of my coworkers is selling a 83 Honda CB1000 custom for $400, and it needs a front tire, gas tank cap, and carbs to be cleaned. Other than that, everything is nice, even the paint and chrome. Does anybody know if this is a good price?

1st May 2012, 18:43

Very good price actually. It is easy to get those things for maybe 2-300 bucks on eBay. Great bike, and one of a kind.

30th May 2012, 01:04

Hey, did you ever pick up the CB1000 Custom for $400.00? If you are not interested in it, could you pass the information on to me... I am in need of a parts bike. My number is 817-485-6004. Thanks!

John Rose.

17th Feb 2013, 00:43

I have the same rattle. I would guess it's your starter clutch. Yes, the 3 bolts behind them work loose and let it rattle like a engine not sounding normal. I had my bike over 4 years before I learned of this. She always ran fine and fast. If you're sitting on the bike, it's on your left side; many tiny bolts covering the case. Take em out; you will need a gasket; eBay has them for like 12 bucks or less. Take apart the starter clutch, and the 3 bolts behind it, remove only one at a time, put Locite red lock tight on that bolt, re-thread and do the remaining. What's happen in there is it's wobbling around, causing the engine knock or rattle you hear.

27th Feb 2013, 14:06

Because your son is a mechanic, ask him if he has ever heard of those bikes getting a rattle or knock on idle only? I own the bike with 17,000 miles and love it. Would never sell it!

I adjusted the timing chain, and it seems to have gotten worse. Followed the manual to a tee. It only rattles in the basement on idle only, and does not affect performance. It has done this for years, and I cannot seem to cure it. Thanks.

Nobody wants to touch it because they say all their old mechanics are gone. I do all my own repairs. Please respond to 1-612-363-4014 Cell #. Not much of a computer guy.

27th Feb 2013, 14:11

Very cold blooded. 42 miles to the gallon, and I do not suggest fiddling with the carbs. Keep them stock, sychronize them, and you will be home free.

12th Jul 2013, 22:52

Hi, my name is Alejandro. I want to buy some spare parts for the CB1000 Custom. Could you suggest some web pages with these parts?

Please write to me at elcolo_@hotmail.com


19th Jul 2013, 18:33

I have read your comment on low end rattle in your CB1000. I am experiencing the very same. I have adjusted both cam chain tensioners and see no improvement. I am wondering if you have had a experienced mechanic make a diagnosis? I am fearing the exhaust cam chain is stretched, which would result in a complete engine tear down. I would appreciate your input. Thanks.

4th Aug 2013, 17:08

Hope you found a manual. If so, can you pass that info on (where you found it)?

13th Jul 2014, 02:44

Hello, I am also a new owner of a 1983 Honda CB1000c. I am have issues with the turn signals not working. I have diagnosed every wire from front to back, and I get power from the switch, but when I reconnect the wire to the turn signals, I lose power period. Any info would be great... Contact me at tomnational21@gmail.com

19th Jul 2014, 01:41

The oil filter is in the front bottom center; it resembles a filter with fins on it and has a center bolt to remove it. Just be sure to have an oil pan under it when you take it off.

25th Jul 2014, 17:48

I just bought that same bike and noticed a rattle. I fixed it by tightening the three bolts and the spark advance. When I took off the left hand starter gear cover, I could see they were loose. Try and save the gasket. I did and it didn't leak again. Loosen them as much as you can, and drop some Loctite in and tighten them up again with an open end.