Plug Readings w/Pics?

[trxxx250r]

Hi, I have a Yamaha 1100 (wave venture). I built the motor from the crank up. The only thing it has other than stock is boyesen reeds. I put about five hrs. on the motor now and it runs excellent.

I'm running all stock jets and set low and hi needles to service manual spec plus a 1/4 turn out.

After last time out ran 10 gallons thru it at mid to full throttle most of the time.

I'm running quick silver syn blend at 40:1

Here are pics of the plugs... I want to make sure I'm not on the path to burning this thing up.

The plugs are lined up left to right 1-2-3. and when I'm holding them up it's first thru third.

Let me know what you think - too lean, too rich or just right?

Notice the center plug.

 

[Quinc]

Are you running the stock Flame Arrestor?

 

[trxxx250r]

Yes.

And that reminds me, do I really need to run those things? They seem like a serious restriction? However, I do realize that the carbs are jetted from the factory with those in place, so...

But for now I'm just looking for opinions on how the plugs look with everything stock.

 

[Big Kahuna]

We use to have a WaveBlaster2, Plugs looked like those all the time. Never got a brown color on the center section.........

On a 701, I would say lean......... but cannot say on those.

 

[tor*p*do]

look at the piston crowns through the spark plug holes
fiber optic light helps
gives more info than plugs

 

[trxxx250r]

Thanks!