Piston was after 20 hours of riding the 2nd top end on the 09...

[BBYamaha]

finished 20 hours of riding the 09 after blowing the motor last season I had it cleaned up, new pistons and decided to make sure it was all burning good today. I rode it on the lake today and the last bit I held onto it for 20-30 seconds and killed it with the throttle open on my way in and then swam it to the trailer and have not started it since... Seems a little lean.... but they look like the are burning the same on both sides... Any thoughts? The right picture the piston was down a little bit, both are identical in person and the left pic is a better representation of what they look like.

I'm running and ada head with 35 cc domes.
msd enhancer
factory pipe

 

[restosud]

trying to save gas eh?
a bit lean there.

 

[Cranes]

Looks good here try a 2 min run if no explosion your all good !

 

[luker]

looks lean to me !

 

[BBYamaha]

What lead me to pull the head was the feeling the motor gave the other day. Kinda tuff to describe... It hit good but the motor felt a little off.. I have heard the motor will "ping" more if its lean and I suspect thats what I was hearing...