What are these plugs telling me?

[Mathewrussell52]

24,000 miles I assume they are stock. So I was surprised 1-2-3 were not tight at all 1-2 I thought the socket was not on the plug because it had no resistance. 1-2-3 look a little lean and have some specks on them hope it’s not from the piston melting but 4 looks good.

 

[RedBull]

Thoughts on my spark plugs | General Bike Related Topics

My plugs seem a bit lean but wanted y'alls opinion. I've seen mixed opinions on what is lean and rich on hayabusa spark plugs.

www.hayabusa.org

 

[Johnnie Phatt]

Would suspect low compression from air escaping past the plugs and poor burn because of it
NOT an expert but, were it me I would install a new set of plugs properly tightened ride about 400 miles and take them out and have a look. If they are still that black I would say you are way too rich. But that is me

 

[Boosted Cycle Perf]

#4 looks like a used plug, with a tune that’s a bit on the fat side.

If it weren’t for the speckling on the others I’d say the same for them for the most part. If I pulled those plugs out of a bike at my shop I would do a compression test, and stick my camera down the spark plug holes to inspect the tops of the pistons.

What is likely the problem is the injectors are clogged up causing your lean conditions. And being as 1&2 are the worst looking that falls in line with a bike that isn’t ridden routinely and sits for periods at a time. 1&2 are the lowest cylinders when on the kick stand, and if there’s junk in the fuel rail it will settle in the rail at the lowest point.

Gen 2 injectors turn to poop fast because of how their tips are designed.

 

[Kiwi Rider]

#4 looks like a used plug, with a tune that’s a bit on the fat side.

If it weren’t for the speckling on the others I’d say the same for them for the most part. If I pulled those plugs out of a bike at my shop I would do a compression test, and stick my camera down the spark plug holes to inspect the tops of the pistons.

What is likely the problem is the injectors are clogged up causing your lean conditions. And being as 1&2 are the worst looking that falls in line with a bike that isn’t ridden routinely and sits for periods at a time. 1&2 are the lowest cylinders when on the kick stand, and if there’s junk in the fuel rail it will settle in the rail at the lowest point.

Gen 2 injectors turn to poop fast because of how their tips are designed.

Interesting info re the fuel rail on the angle and the debris settling when on the side stand for long periods, had never thought of that, but will add that to my arsenal of diagnoses in the future, thanks, I learned something today!

 

[Johnnie Phatt]

Interesting info re the fuel rail on the angle and the debris settling when on the side stand for long periods, had never thought of that, but will add that to my arsenal of diagnoses in the future, thanks, I learned something today!

I have found if I just keep quiet when the elders are speaking I tend to learn things. Good point Boosted Thanks for the info
John

 

[ali123]

I have found if I just keep quiet when the elders are speaking I tend to learn things. Good point Boosted Thanks for the info
John

boosted is a young buck! 30s at best.

 

[Boosted Cycle Perf]

I have found if I just keep quiet when the elders are speaking I tend to learn things. Good point Boosted Thanks for the info
John

Is 33 the new 70?

 

[Bumblebee]

boosted is a young buck! 30s at best.

I remember being that age once....no I can't....

 

[Kiwi Rider]

I remember being that age once....no I can't....

Oh the energy levels at that young age!
5 hours of riding the mare, no problems
Easy for the stallion I once was . . .
Now I’m just an old draft horse trapesing around the paddock . . . Sigh....

 

[ali123]

Oh the energy levels at that young age!
5 hours of riding the mare, no problems
Easy for the stallion I once was . . .
Now I’m just an old draft horse trapesing around the paddock . . . Sigh....

it rarely ends well for any of us.

 

[Kiwi Rider]

it rarely ends well for any of us.

As the wise man once said . . .
" youth is wasted on the young "

 

[Bumblebee]

it rarely ends well for any of us.

I don't know, it will end like nature or God intended...it's the voyage before the end which is important.

I quote the line from Shawshank Redemption "time to get busy living or get busy dying"

 

[ali123]

I don't know, it will end like nature or God intended...it's the voyage before the end which is important.

I quote the line from Shawshank Redemption "time to get busy living or get busy dying"

LIFE IS LIKE A BOX OF CHOCOLATES

 

[Johnnie Phatt]

boosted is a young buck! 30s at best.

There is more to being an Elder than being old

 

[Bumblebee]

There is more to being an Elder than being old

Yep...although the term "elder" relates to age...there is more to being wise than being old though...

 

[Kiwi Rider]

Aaaaahhh, pearls of wisdom.... now, back to spark plugs, and what they can tell us.

 

[ali123]

Aaaaahhh, pearls of wisdom.... now, back to spark plugs, and what they can tell us.

All these guys thought they were dealing with Mr. Mi-Ogi…. but really it was Daniel-son.

 

[E Zurcher]

I used to install my plugs and torque them to factory spec. Several times I found loose ones. Now I tighten them until I feel the crush washer just finish crushing and give them about an eighth of a turn more. No more loose plugs. Be sure to use antiseize compound on the threads.