What size spark plug spanner please

[Invasion1973]

While we are talking spark plugs are these normal condition good/bad.
Fitted 1000 miles back

Rear cylinder


Front cylinder

 

[El Hombre]

That’s a good idea how much is Harley manual ? I bet it is ridiculous!
I used torque wrench last night tightened up to 13 ft-lbs I wouldn’t want to take it up to the upper figure of 18.

Neither would I!

 

[SJC69]

Oil Dag, now there's a thing from the past. The Post Office aka British Telecom used to use it on the old strowger switches. It was terrible stuff really.

When I joined as an apprentice they had just started a regime to clean every mechanical device of the stuff and switched to a cleaner oil.

That's the stuff, also excellent lubricant on dried out speedo & tacho cables too, my bottle is still half full and will probably outlast me!
(Ps that's not my bottle, the label fell off years ago, it was one on e-bay half full for £10!)




You can still buy a version of OilDag but it certainly is not cheap about £85 for 1kg tin!

 

[Andy from Sandy]

The Harley manuals has come up on here a couple of times very recently. Members have access to pdf versions.

 

[softail898]

Oil Dag, now there's a thing from the past. The Post Office aka British Telecom used to use it on the old strowger switches. It was terrible stuff really.

When I joined as an apprentice they had just started a regime to clean every mechanical device of the stuff and switched to a cleaner oil.

I remember that stuff too when I was in the P.O. as an engineer. Worked a treat but filthy stuff really. Very expensive to buy now.

 

[Martz]

Spark plugs are simple. Tighten by hand and then a 1/8 - 1/4 turn. If the threads in the head are bad due to cross threading, over tightening etc and you cannot tighten by hand, get the threads re-cut before it's too late. I've never used a torque wrench on plugs and I've changed countless thousands.

 

[Invasion1973]

@Martz Thank you. Will try this appreciate your advice. Can I ask you if these plugs are good colour don’t really know much on that side of things maybe one is a little more sooted up
Thank you

 

[Martz]

Did you take them out after a run? The best way I've found is to get the bike good and hot, 20 miles or so, get up to a decent cruising speed say 60 or there abouts. Hit the kill switch, coast in and do a plug chop. Looking at those plugs it looks a little on the rich side, like it's been idling or going slow around town, not massively so but you need a more or less uniform colour on both plugs. Rear cylinder usually runs a little hotter so expect that to be slightly lighter if everything is set up right.