Plug spanner

veeeffarr · Super Spammer Joined: 22 Jul 2004 Karma :

Anyone know what I can use to take out a DPR8EA-9 spark plug? My socket in my toolkit doesn't fit Sad

Jrod · Page 3 Girl Joined: 02 Aug 2004 Karma :

A plug spanner? Rolling Eyes

most car shops will sell them.

the grim reaper · World Chat Champion Joined: 29 Jun 2005 Karma :

You might be better off getting a plug socket as the vast majority of bike plugs are recessed, buy a ratchet and an extension bar too.

Cheers

Grim
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veeeffarr · Super Spammer Joined: 22 Jul 2004 Karma :

Well I have one, but it doesn't fit... So I was wondering whether there's a specific measurement someone who has experience with these plugs could give me?

map · Mr Calendar Joined: 14 Jun 2004 Karma :

Plug spanner. From memory that's a 10mm one. If you're unsure you can get a double header one (it swivels in the middle) with the 10mm on one side and 12mm the other.

BTW the mm size refers to the size of the plug, not the size of the nut.
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the grim reaper · World Chat Champion Joined: 29 Jun 2005 Karma :

I have 10mm, 12mm and a 17mm plug sockets. There maybe other sizes but these do every bike and most cars I've worked on.

Cheers

Grim
____________________
Adverts don't always work: Remember that advert, where the army are running across the desert and they have a wounded man on a stretcher. They get to a ravine, the bridge is down and a caption pops up that says, 'What are you thinking?'. I don't know about you but I was thinking, 'Christ, I'm glad I'm not in the f***ing army'.

Guest · Brolly Dolly Joined: 22 Apr 2004 Karma :

A 'D' plug has a 12mm thread and needs an 18mm socket .... Plug codes here .......

https://www.spark-plugs.co.uk/pages/technical/ngkjpg.htm

Buy a set of plug sockets ........

https://www.spark-plugs.co.uk/graphics/images/tools/magnetic_sockets.jpg

They'll pay for themselves the first time you don't break a plug off Wink

map · Mr Calendar Joined: 14 Jun 2004 Karma :

veeeffarr · Super Spammer Joined: 22 Jul 2004 Karma :

Surely if it's a 12mm thread then I'll need a 12mm socket? Hmmm...

The one in my toolkit looks as though it would fit, but it's too short Sad

map · Mr Calendar Joined: 14 Jun 2004 Karma :

Guest · Brolly Dolly Joined: 22 Apr 2004 Karma :

Wot map says Thumbs Up

https://www.koken-tool.co.jp/img/products/product/clip/3300c.gif

A proper plug socket usually has a rubber bung or a bas lip inside to grip the plug and stop it falling out as you remove it. As you can see from this drawing the hexagon size is bigger than the thread size, but it's correct engineering practice to quote the thread size.

So those bolts on your bike that take a 10mm spanner are actually 6mm bolts (thread diameter)

veeeffarr · Super Spammer Joined: 22 Jul 2004 Karma :

Guest · Brolly Dolly Joined: 22 Apr 2004 Karma :

You got it Thumbs Up

You can also juggle up the plug codes ..........

D8HS would be 12mm thread diameter and 12,7 mm thread length
B8HS would be 14mm thread diameter and 12,7 mm thread length
C8ES would be 10mm thread diameter and 19 mm thread length

the extra numbers and letters are just 'refinements' as you can see from the list.

The heat range number (8 in the examples above) can be a bit confusing. A lower number like 6 is a 'hotter' plug, but they're usually found in less tuned engines like old mopeds and lawnmowers. A number like 9 or 10 would be a 'colder' plug that would be found in a highly tuned engine like a racer.

It's best to stick to the proper heat range if you can. A 'cold' plug (9) in a lawnmower wouldn't work very well, and if you went the other way and put a 'hot' plug (6) in an R1 it'd probably melt and destroy the pistons.

veeeffarr · Super Spammer Joined: 22 Jul 2004 Karma :

Guest · Brolly Dolly Joined: 22 Apr 2004 Karma :

You can order them on-line from this place .........

https://www.spark-plugs.co.uk/

And I've heard they're pretty good.

Click on Part finder and bikes and then select your year/model. they quote £4.72 including VAT and delivery for DPR8EA-9

Never hurts to have a spare plug in the shed 'just in case'
Wink

They also do plug spanners ......

https://www.spark-plugs.co.uk/graphics/images/tools/box-wrenches.jpg

bish777 · World Chat Champion Joined: 11 Nov 2004 Karma :

bish777 · World Chat Champion Joined: 11 Nov 2004 Karma :

Mark_petty · Brolly Dolly Joined: 01 Jun 2005 Karma :

I use a plug spanner the one I got with the bike. I'm sure it says 22 on the end of it.
Your engine probably is the same as my Honda CLR 125 engine
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