maintenance

I have a stock '79 that I have been slowly working on as time allows. After an extensive amount of work overhauling the electrical, suspension, wheels, and tires I am tackling the carbs/engine. Behavior: Immediately starts with choke. Begins revving high immediately. Turn choke to 25% and bike...

First post here. I have driven Hondas since I was 16.....68 now. 1967 Super 90, 1973 450, 1981 750C. A few years ago, I bought a Sportster, and sold the 750C...should have kept the Honda. Never bonded with the Harley. Sold the Harley recently and went looking for another Honda. Came across a '79...

Hello i just bought a 1982 750 super sport and it dont like to start cold. the guy i bought it from said dont give it any fuel or choke this sounds odd what does this sound like to you guys.and thanks for a super forum.

Hi all, I am a Filipina so I hope using my language is manageable by you. Inquiry lang po sana. Im from baguio snabe ko lang location kasi dito madaming taas, baba na daan madami din curves at blind curves. Anu po ba ang magandang Motor na gamitin for initial budget na 50-60K automatic...

I recently restored a 1979 Cb750, had to put a new head gasket in, completely rebuilt carbs and carbs are synced stuff like that, anyway the engine runs great. I have a mac 4 into 1 exhaust and jets are at 105 main 75 idal, ( stock is 102 main 68 idal) But here is the problem, the plugs are...

I currently have purchased a 1977 honda cb750 and im quite a rookie when it comes to building/restoring these types of machines. I just wondered whether someone would be able to tell me what this part is??? looks like its missing something?? Its located just beneath the battery housing unit and...

Hi all, I have just swapped the handlebars on my 79 Cb750fz from the higher US bars to the Europe spec lower bars. My throttle cables are now too long and no matter how I route them they sometimes stick when operating the throttle. Which models throttle cables would fit to fix this problem, ie...

Hello, Do I actually have to remove the cam chain tensioner in order to remove the starter motor. If yes, why? Thanks!!

Hey all, I bought my first motorcycle, a 1979 cb750k, last July. When I bought it, I really had no idea what to look for and couldn't spot any potential issues. When I bought it, the previous owner rode it over to my place and it didn't seem to have any issues with starting (warm). In the...

Hey all, just recently acquired a 2001 CB750 that... needs some love. Luckily I'm a loving kind of guy. I have a background in auto and truck mechanics, and a hell of a lot of fabricating, but not so much in the motorcycle department. Looks like Clymer manuals only go to 99 - are they pretty...

Hey all, new to the forum, just picked up an 82 cb750c last spring and tuning it up for use this summer. I'm checking the valve clearances per the service manual, and exhaust is all nicely between .003" and .005", but intake are all tighter than .0015" (smallest feeler), and I can't use the...

Howdy, I have a new harness and I'm trying to figure out how to connect the solenoid. I do not have one currently on the bike, so i'm replacing the whole solenoid. But, there are two nodes that need to be connected to something. Here are my questions This photo shows the connector...

What the hell makes this piece so damn expensive and causes everyone to charge over $7.00 for shipping? Where or how can I make replacements for this tiny little piece? The ones currently installed are dry rotted and the suspension is bad so needs replacement.

Hey All! Happy to join the ranks of happy CB750 owners. There are a few questions I have regarding my newly acquired cb750. Hopefully you will be able to see the pictures attached. First: Is that front rotor too rusted? it isn't pitted at all, pretty smooth.. the rust seems to rub off...

Hi All, I bought a '79 cb750 last year and was able to get it running. However, I am having a lot of issues and I dont really know where to begin. My biggest issue that I am trying to solve for the moment appears to be a problem with the carburetors. Currently the bike does not start unless...

Hello, I am a new rider and riding a 1992 cb750 What I've done with help from a mechanic: -Carb Clean (literally 1-2 weeks ago) -Oil Change ( with carb clean) -new battery(last week) Today, I was riding my Nighthawk and I was throttling and then my RPMs started to go down and as I came to a...

AMC forgive me for I have sinned. I am into the second rebuild of my ‘82, in my first rebuild I swapped out used exhaust valves for other used exhaust valves from a spare engine. I lapped them in etc, but I now see from some of your other threads that this was not my smartest move. I got a solid...

Hello All, I am new to this and have looked around and didnt really find any info on this subject, but if i missed it i do apologize in advance if that is the case and appreciate the information. i was lucky enough to come by a 1973 Honda CB750 but it is in parts. I do have all the parts to put...

Hey guys, Trying to get the bike tuned a little better, Right now from at Idle when I give a large throttle blip there is little response/ the bike almost dies. I cant be a bit more gradual and its ok. Same for once I'm at a bit higher RPM. Fuel accel pump is working. Currently only non...

Hi guys! Bought this thing for my bother after his 06 R1 popped. I'm going to need some guidance keeping it going, since its not a very common bike. Does anyone know of any dedicated forums for this motorcycle (1984-86 Honda nighthawk 700sc) or its sister platforms? Is this a common bike on...

Hi all, I'm looking to do a complete engine strip and rebuild, and was wondering if anyone knew of a company in the UK where I can get a complete kit (seals, gaskets, bearings, piston rings). Many thanks

I've finally got my '72 rebuilt and running, and am on to adjusting the carbs. I have pods so I will be rejetting, but for the time being, I just want to get it to a functional state. I looked in the manual, and it depicts a very large multi-slotted airscrew. This is of course nowhere to be...

So I'm currently working on a top end rebuild for a 1972 CB750. When I got the bike, the engine turned over easily, but as it hadn't been run in a while and I had no idea on the internal condition of the engine, I decided to do a top end rebuild just to be safe. I tore it down with minimal...

N00b here when it comes to brakes. I have a caliper that seems to misbehave after braking once or twice - piston gets jammed, have to wait until it slowly goes back in. I figured a rebuild would be a good idea after asking around and would be interesting. Long story short, master cylinder is...

is it common for a 01 750 nighthawk to have its chain sprockets a different size ? motor sure seems to turn fast! im sure th engineers know more than I but im not racing it

Just a quick intro. New to the CB750 but not new to motor cycles. I mostly work on them now rather than ride. My age is showing. This year I have rescued 2 old relics and turned them into useful bikes. A 50cc Chinese monkey bike for my younger grand son and a CB400T II for my older grandson...

Hey all, I decided to get rid of my stock exhaust and changed it for a Delkevic 4-1 megaphone exhaust last summer. Of-course some rejetting was necessary so i went ahead and changed the main jets from 68/102 to 75/112. It seems to run pretty well except for two things, It's a bit boggy in the...

Hey everyone, I'm doing a full rebuild on my PD 42 carbs. Ive spent the last few hours scrolling the internet trying to figure out the type of tubing and size between the carb bodies to no avail. Im guessing the yellowed tube is a vacuum tube and the black is fuel line. Does anyone have a...

Hi there fellow CB750 enthousiasts I did full restauration on a 1983 CB750SC Nighthawk See pictures. I did everything and went throught everything except removing the cylinder head from the engine. Everything else is brand new or rebuilt, including the carbs (rebuild) I have been driving for...

Hey Everyone, I have a 1978 750K I've been having trouble getting a decent idle. I can get it down to around 1600 RPM, Any lower and I will get that odd pop hiss sound and the bike will die But, when my idle is working at that low the bike will bog down and stall if I give it too much...