I think there is a fuel line and vacuum line coming off the fuel switch. There are factory service manuals on the boards you can look through. I will see if I can link a scan of fuel system

 

Internal tank screen / mesh is gunked up - clean or discard totally.

Unscrew tank petcock and rebuild &/or de-gunk which ever is cheapest

also tank breather maybe rusted shut drill small hole in fuel tank cap under
key flap

Trust me - do all 3 - plenty of petrol will flow


"I'm sure its a gravity fed system & no fuel pump is visible."

Then that rules out any issues there

 

Welcome to the site. You should have a electric fuel pump unless someone took it off and made it 100 percent gravity fed. It is gravity fed through the petcock then after the switch there is a fuel line that runs to the fuel pump. Check and make sure you fuel switch is in the correct position. There are 3 positions. ON- which is straight up. Off- which is horizontal. RES- is straight down. Once you get fuel flow next thing I would also check would be fuel pump and replace the fuel filter.

 

I hate when you guys say things like it's a 'K' because I have to guess the year. After looking up what years the 'K' was produced, it sounds like a '89 or '90. In that case you don't have a fuel pump, you have a vacuum activated petcock like mrniceguy mentioned. There is a small port on the backside of the fuel petcock that needs vacuum to open the fuel flow. If you suck on it fuel should flow, if not you need to remove the four small screws and remove it to clean it out. Be careful, there is a spring behind the plate that pushes on the diaphragm that closes the flow.

You need to check the vacuum line coming off the left side of the head where the vacuum port is. If that vacuum line is cracked, you will not get enough vacuum to open the flow.

welcome to the forum.

 

Learn something new everyday. TimBucTwo your right on. Just pulled out the ole manual and the 1000 K is gravity fed. The 1000 H, J and all 600 models are fuel fed by a electric fuel pump.

Well at least Martin O will save money by not having to buy a fuel pump.

 

I must be missing something I guess. My manual is for '93-'96 and doesn't list the bikes as a letter of the alphabet. The side of my bike says CBR1000F. There is nowhere on the bike with a decal of CBR1000FK or CBR1000FJ or any other letter of the alphabet. I know there is a letter in the serial number depicting the year but isn't it sooooo much easier just stating the year rather than constantly looking up what year a letter is representative of?

Is it just me or do you guys have decals on the fairings with the letters marking the years?

 

The letters aren't on the fairings but they are on the paint code stickers under the seat. Here are the ones of my 89 ( K model ) and my 92 parts bike ( N Model ).

 

You're right, TBT. Much easier just saying the year. I believe mine is an "s" model, but 1995 can't be mistaken.

And you're right about the other stuff, too. Now I don't have to say anything.

 

I got my information from the Haynes Honda CBR600F1 and 1000F Fours. Covers 1987-1996 years. Haynes states the engine VIN on 1000 models is located on the front edge of the crankcase next to the crankcase mating surfaces. Supposedly this VIN tells the model code, a serial code, the model year and the manufacturers identification.

So what does the frame VIN tell us, mine starts of with a JH2SC24 so does that mean I have a J and H model, LOL. The haynes manual doesnt break it down. In fact for my 94 and 93-96 US models it says the details are not available. Then says a 92 model was not even produced for the US .This would be the US 49 state models and the California model. Then there is the UK models which shows information for all models 87-96 but no details for the 92 year. Really the details dont show much either, looks like just production sequence numbers.

I need to look at my engine VIN just for reference.

I do know I have a electric fuel pump. I have seen it and put my hand on it. LOL. Oh yea my bike does say 1000F on the decal....LOL. I cant decide wether to put a J or a H after the F. At least we know F comes before H and J in the alphabet.
I am just trying to make things more confusing.