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Messages - Greyboy

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1
CB750 / Spark plugs.
« on: June 15, 2026, 10:59:15 PM »
Dear All,

I was given a set of new NGK plugs when I bought my 750 F1.

Recently I thought I would fit them as i am doing other work like oil/filter change, brake fliud and fork oil change.

I then realised the the plugs are not all the same, two of one type and two of another. DPR8EA-9 and DR8EA. See photos.

I removed one of the old plugs to find it is the same as one of the new ones. DPR8EA-9

I then checked with David Silver and they quote different again, DR8ESL.

Does anyone know if any of my new plugs will work or shall I just buy a set of new ones.


2
CB750 / Re: Honda CB750F1 Main stand removal.
« on: June 15, 2026, 10:46:57 PM »
Dear All,

Thanks for your help and suggestions. The stands have now been coated and are now back in place.

I fitted a new side stand spring but kept the main stand one and wire brushed and painted it.

I didn't bother removing the springs first, just removed them as the stands came off. Same with replacing, I used the stands to lever the springs into place.

The 750 F1 has a design fault in that the main stand tube can only be removed when not only the exhaust silencer but also the headers have to be removed as the tube hits them.  :(

That did give me the opportunity to clean up and polish the whole system as parts of it are difficult to reach when in place.


3
CB750 / Re: Honda CB750F1 Main stand removal.
« on: March 04, 2026, 10:39:12 PM »
All,

Thanks very much for the replies.

I will remove the spring first. It is looking rusty and dirty but will probably clean up ok. I'm not sure if the shaft is rotating in the frame but I will clean it up and grease it well on re-assembly.

I couldn't get the paddock stand in place as the exhaust silencer is in the way. I removed the two nuts and bolts holding it to the frame. One of the clamp bolts came out and the other is somehow an anti theft shear bolt with nothing to get a spanner or socket on. I thought I would loosen it by turning the threaded end with mole grips only to find my four sets of various mole grips have disappeared!  >:(

I then used my Dremel type Black & Decker multi tool to grind the head off the shear bolt. All was going well, then there was a loud pop from the tool and the garage lights went out. The garage supply breaker in the house had tripped and the tool is now no more. I will buy another one and complete the job at the weekend.

There is lots more to do on the bike so I will, no doubt, be after more adviice in the future.

Kind regards,

Mike.

4
CB750 / Honda CB750F1 Main stand removal.
« on: March 03, 2026, 12:48:46 PM »


Hi All,

I am removing the main stand and side stand to get them powder coated.

The side stand is off, no nut on the back but i have found one to fit.

I am not sure how the main stand is removed. I plan on putting a paddock stand under the swinging arm then ......

Loosening the two pinch bolts.
Removing the split pins
Tapping the tube out along with removing the spring.

Does this sound like the correct way to do it?

Thanks for any advice offered.

Mike.

5
CB750 / Re: CB750F1 - 1976 UK model seat cover.
« on: January 18, 2026, 11:37:11 PM »
Dennis,

Thanks very much for your reply. Your photos show that the David Silver one is closest to the original, albeit without the Honda logo.

Kind regards, Mike .

6
CB750 / CB750F1 - 1976 UK model seat cover.
« on: January 02, 2026, 07:55:44 PM »
Dear All,

My 750F1 1976 model has the wrong seat cover. See attached photos of the red bike.

For purely cosmetic reasons, I would like to put the correct pattern cover on.

I would like the pattern shown on the screenshot of the blue bike. P&K have the pattern attached which has a double line down the middle and David Silver has the one with no line.

Is there anyone on here who has the original cover on their bike or can give me an idea of which is more like the correct one?

My cover also has the Honda logo on the back which P&K say is incorrect.

Thanks in anticipation.

Mike W.

7
New Member Introductions / Re: New Member
« on: November 12, 2024, 11:33:14 PM »
Thanks, that is very useful.   :)

8
New Member Introductions / Re: New Member
« on: November 12, 2024, 11:05:54 PM »
Quote from: Ken4004 on November 11, 2024, 05:50:54 PM
Welcome Mike really nice looking bike has it been recently restored prior to you buying it or is it your own work ?

Thanks for all the comments.

The previous owner restored the bike. He has achieved a very nice rideable bike, which is what I wanted, not so good that I would be scared to ride it. It also has a standard exhaust which are now unobtainable.

I haven't the time, patience or skills required to carry out a resto although I think I can maintain and carry out a few improvements.


9
New Member Introductions / Re: New Member
« on: November 10, 2024, 08:51:06 PM »
Quote from: Athame57 on November 10, 2024, 08:43:36 PM
Hello Mike
Welcome here. I'm sure this problem you have will soon be sorted, you have arrived in a place full of experts!  ;D

Thankyou. All expert advice is very welcome.   :)

10
New Member Introductions / Re: New Member
« on: November 10, 2024, 08:48:13 PM »
Ted,

Thanks for your reply and advice.

One of the wires is broken, all the contacts are clean and good, I have tried a bridging wire between the contact and bulb and it lights up ok.

I was thinking of tying string to the cables to pull it all back through.

I will definitely try warming and silicon spray.

Mike.

11
New Member Introductions / New Member
« on: November 10, 2024, 07:59:01 PM »
Hi All,

I have just joined. I have bought a CB750F1 this summer.

I haven't ridden it much as the headlight now doesn't work.

I have carried out fault finding and one of the wires between the right hand on/off switch and the headlight is broken.

I fitted new throttle cables athe week before so suspected that I had maybe broken a wire as I had the force the two halves of the switch apart to remove the old cables.

I imagine it will be quite awkward to withdraw/refit the wires through the handlebar.

Any advice will be welcome.

Ride Safe.   Mike.

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