Topic: spark plug removal

[Bluewall]

I have been having a real problem removing the middle two spark plugs on my 73 750 k.  I can get one out and in but the #3 is giving me real problems.  Counting from right to left when sitting on the bike.  I am using a standard socket 3/4.  any advice?

[05c50]

The spark plug socket should be 18mm, the original socket that came in the tool kit will work.

........Paul

[Bluewall]

Thanks Paul
But unfortunately there was no tool kit when I bought the bike.

[flybox1]

buy the an original honda spark plug tool...

[BobbyR]

There are small engine removal tools very cheap which may work. They look similar to the honda too.

[05c50]

Thanks Paul
But unfortunately there was no tool kit when I bought the bike.

I use an 18mm socket that I bought from Sears.

..........Paul

[Bluewall]

Thanks to all of you for the advice!!!!!

[Bankerdanny]

I haven't checked my 750, but a 5/8 sparkplug wrench worked just fine on the 550.

[seanbarney41]

I haven't checked my 750, but a 5/8 sparkplug wrench worked just fine on the 550.

that will only work on a 750 if you got Champions...

Bluewall, the clearance in the spark plug cavity varied over the years or from casting mold to casting mold...a standard 3/8 drive 18mm socket will not always work...the Honda toolkit socket will always work.  I have a 18mm socket that I found in one of my bikes that was ground thinner to fit.  Later I cleaned it up a bit in a lathe...so that can be another option

[70CB750]

I got sparkplug wrench from vintagecb750, it works well.

Also there is a trick using rubber hose to start to thread the plug in. 

[754]

Should look like this.. works really well with 1/4 socket welded in the end.
 Clearance  problem is at the valve cover.
 Use a short piece of hose on the porcelain part of your plug to start it, then you never strip one.
Install with socket, you take your chances..

[johans]

I've been using this type for years and it saves a ton of grief on cars and bikes .  Old school is a piece of rubber tubing  .They are cheap also !

https://www.amazon.com/STEELMAN-08310R-Flexible-12-Inch-Starter/dp/B000IE5TSQ

[70CB750]

^^^ Frank, does it remind you of something?

[754]

Yeah coolant hoses,, snap together. Used them for air blast too..

[PeWe]

CB750 stock plug tool is a must be used on 2-3 on my K6. Other tools are too thick since the cavities are tight. I have an old K1 head where even 1,4 are tight.

[robvangulik]

the #3 is giving me real problems.  Counting from right to left when sitting on the bike. 

We all agreed to start with #1 on the left, seen from the saddle!