Spark plug torque setting.

Slofun · 04-03-2021, 02:59 PM

Any guidance on the torque setting for the spark plug? I’ve searched the forum and can’t find a spec for it. Manual says for a new plug turn 1/2 turn after seated. I’m much more used to torquing my plugs if anyone can give me the right setting. Thanks!!

cycleway4 · 04-03-2021, 07:19 PM

Not to over-think it, as many will do this from "feel",....but the official NGK spec for 12mm plugs, is 11 to 13 ft-lbs......or about 144 in-lbs

Jeff Richardson · 04-03-2021, 07:24 PM

I turn it until tight but not too tight. ��

Megadan · 04-04-2021, 03:14 AM

Quote:

Originally Posted by cycleway4

Not to over-think it, as many will do this from "feel",....but the official NGK spec for 12mm plugs, is 11 to 13 ft-lbs......or about 144 in-lbs

Winner. Most spark plug torque specs into alloy heads is around 12ft-lbs.

Slofun · 04-06-2021, 06:19 AM

Quote:

Originally Posted by Megadan

Winner. Most spark plug torque specs into alloy heads is around 12ft-lbs.

Sounds good. Thanks!

Marc Hufnagel · 09-17-2021, 02:16 PM

Quote:

Originally Posted by Slofun

Sounds good. Thanks!

Hot or cold cylinder head? Seems like it could make a difference.

TominMO · 09-17-2021, 02:38 PM

My general rule of thumb for all threaded fasteners, if I do not have specs or it doesn't seem that important, is to turn it 1/8 turn (45 degrees) past snug. If that seems too loose, I will give it just a slight extra turn, maybe 1/16 or less. Turning 1/4 is too much. Important fasteners like head bolts I always torque to spec. I am extra careful with aluminum threads of course.

04-03-2021, 02:59 PM	#1
Slofun Join Date: Mar 2021 Posts: 40	Spark plug torque setting. Any guidance on the torque setting for the spark plug? I’ve searched the forum and can’t find a spec for it. Manual says for a new plug turn 1/2 turn after seated. I’m much more used to torquing my plugs if anyone can give me the right setting. Thanks!!
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04-03-2021, 07:19 PM	#2
cycleway4 Join Date: Feb 2007 Location: Virginia Posts: 269	Not to over-think it, as many will do this from "feel",....but the official NGK spec for 12mm plugs, is 11 to 13 ft-lbs......or about 144 in-lbs __________________ <div>Steve 2006 Roketa DB-07A/RSX-200E 2008 Roketa 250 Scooter 2019 Brozz 250
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04-03-2021, 07:24 PM	#3
Jeff Richardson Join Date: May 2018 Posts: 64	I turn it until tight but not too tight. �� __________________ 2017 RPS Hawk. Mikuni carb, 117.5 main, 25 pilot. Foam filter. NGK plug. Upgraded exhaust. 17/45 sprockets. Digital speedo. Full LED all around. U5 handlebar spot lights. 1982 Yamaha XJ1100 Maxim
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09-17-2021, 02:38 PM	#7
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 1,871	My general rule of thumb for all threaded fasteners, if I do not have specs or it doesn't seem that important, is to turn it 1/8 turn (45 degrees) past snug. If that seems too loose, I will give it just a slight extra turn, maybe 1/16 or less. Turning 1/4 is too much. Important fasteners like head bolts I always torque to spec. I am extra careful with aluminum threads of course. __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself
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