maintenance

Hello all, i just pulled my grandfathers 1976 Cb750f out of storage. It had been sitting for about 10 years and the carbs were filled with sediment to the point i had to take them to a shop with a parts cleaner to get them taken care of. Once they were back together and on the bike i was able to...

Whenever I stop riding I can smell gas. I know my gas lid isn't perfectly tight because when my friend turned it upside down when I had it off, it came out the top. Is that normal? How would I fix it if it isn't? It doesn't explain the smell after riding, however. I don't see any wet spots...

hi fellow CB enthusiasts this was my dad's baby and as you can see he took very good care of her. she has been standing for the last 12 years and i was hoping to get some tips regarding what work needs to be done to her before she can be started up. i can recall that my dad wanted to do the...

Greetings everyone! As the title states I am looking at picking up my first bike in a couple of weeks if all works out. I found a 75 CB750 for sale and while it seems like its in good shape, it does need a few things. The seller says that it idles, revs and shifts fine. He also cleaned the...

So I gave my bike an oil change and it turns over much better now without the water in it! (I used some seafoam, but couldn't get it running, just turned it over a bunch). It gives a few thumps but won't start. The thumps are fairly rough. I'm worried the points are filthy. The spark plugs are...

Hi all, I just got a cafe style 77 CB750 with a 78 motor. It's got a shorty 4 into 1 pipe on it, overall the bike looks and sounds great but at the moment I've got a problem, well I'm sure there's more than just one. FYI: I'm relatively new to working on bikes and I've never worked on anything...

The other day I was getting white smoke out of my 1&2 engine pipe. Don't know why, it was hard to keep running unless I gave it throttle. I was worried it was running lean. I've tuned the carbs a bit richer, but when playing around the 3&4 gave off a little white smoke too. My bike has been...

Hi guys, New to the forum. I have a 1980 CB750K brat. I bought it several months ago. It ran well when I bought it but still took it to whats supposed to be the top bike shop around and had them do a full service and tune. It ran fine after that also. It sat for a few weeks. Started it after...

I can't get a repair manual for my 1978 cb750 until a week from now due to shipping and no one local carries them. I have found online resources but most do not cater to my bike and I can't seem to find what I need through all the different options of downloads. Does anyone know of a simple doc...

Hi everyone, I live in Fort St John, on the Alaska Highway. Last summer I bought a '79 CB750K, 10th anniversary edition with 16 000kms on it. I love this bike. I'm planning on riding it down to baja in a couple weeks (I might throw it in the back of the truck and drive south till it's warm...

Maybe someone knows what this is. When the engine is cold, and for the first 10 minutes or so of driving, the engine steps down to idle just fine when I stop. But after the engine starts to warm up it doesn't want to drop into idle and will rev to around 3200 rpm at a stop. When it starts...

hi there, im jon. im new to the motorcycle circuit. just recently came up on a 74' motor and rolling chassis. motor is in pieces but seems to have most everything with it (to the best of my knowledge) have the lower end up on a stand right now and am ready to start working on it as far as...

hey guys figured id throw this out there i know we are always looking for a place for used parts etc and dont always finds them on ebay so here is a place ive used for my other bikes in past so here is the link if your interested http://www.mcsalvage.com/coopers.htm

Hi, I have a '78 CB750 SOHC I recently bought that is blowing smoke like crazy and I've been considering doing the top end, though I've never done it before. I'm a little worried about getting it all dismantled and getting stuck, having my bike out of commission, and having to find someone to...

So the 75 750f I have is supposed to have an 836 kit in it I have yet to determine and not sure how to go about that but that will be a different thread. So back to my main reason for the thread, adjusting the valves is there a difference in tolerances for the 750 and 836 kits

I have a 1975 CB750F Super Sport... I get 22MPG on highway and 18 in town. What is the best MPG that you get or the best you've heard of for my make and model...how was that good gas milage achieved? I am well aware that with a older bike that I won't be getting 100MPG but I should be getting...

I'm looking at getting some steering bearings and found a company : Pyramid Parts that sells a kit consisting of Upper/Lower taper bearings, shells (races), upper/lower seals, grease and a link to fitting instructions. $ 43.50 Whats the best way to remove the old races? I have different slide...

OK, I think I saw mention to this before, I bought an Actron compression tester and it only goes to 14mm, I can get an adapter to step down the size, they have a 12mm and a 10mm. I'm thinking that the CB750 1975 is a 12mm, I can't find the size in my manuals, anyone have the correct size so I...

I think I've found the problem with my oil pressure. Oil isn't coming out of the oil tank as it should. Now my biggest issue is, I can't get the oil tank out without removing the motor. And that I just will not do at this point. So my question is, what is the best way to clean out an oil tank...

It looks like there are 3 major kinds of tank sealers: Kreem POR 15 Red Kote I need to put a sealer in my tank. Has anybody used these? Any opinions on which is best and easiest to use? Thanks!

So, this past February I attended the annual Easter Sportsmans Expo as I always do(Im a hunter :) ) and I was lucky enough to stumble on a booth promoting a polishing paste and liquid called Flitz, I proceeded to ask questions (with my bikes in mind) about the product as my Wenol brand polish...

Well I said I wanted to be up and running by my birthday. Success!!! Found an electrical short yesterday that was giving me a fit at higher RPM. Fixed the short and WEEEEE she is alive and running. Went on my first ride today. How sweet it is to be out and about. The list of things that is...

Now I know why my cush drive wont fit my hub. The dampers are for an A-model and/or a F2 Super Sport and my cush drive and hub is a regular K-model. The question is, can I somehow modify my dampers to fit my hub/cush drive, or do I have to get a set of new ones? They're pricey as hell over...

Every gear, whether I start at 1500rpm or 6k rpm, it slips around 7k. It will also slip into a neutralish state, like i'm driving a standard tranny car and didn't quite get it in gear....but there isn't a neutral between 3 and 4th gear. :confused: I've changed her oil a couple times, replacing...

I thought I'd put this question up here. I've pulled my carbs and they really need a good cleaning. Now this is how they look: You can clearly see why they need to be cleaned. I have had them sitting in diesel the last couple of days and that haven't done anything to the state they're...

Since I have the engine case changed out due to a hole in my old one I thought I'd ask my fellow members here on CB750.com what you all would do to/with your engine while it's apart? First, I'm not going to crank up the hp's in any way, I'll keep it stock for durability. Since I haven't even...

Ok so im trying to button up my build on my 78 CB750F and My current problem is the main fuse 15A had a blown fuse and the prior owner had put a piece of foil under it to avoid future blown fuses.....Not my idea of safe. Well I chased the short to the VOLTAGE REGULATOR (I think). What I need...

anyone know the order for adjusting the valves ??? im used to doing single cylinder atvs and stuff ,i cant find any good instructions on adjusting anywhere,its a 73 any help will be greatly appreciated!!