SBT PISTONs for Yamaha fx sho O9

[RYANO]

Hi SBT TECHs,

A BRAND NEW SBT Piston for a YAMAHA fx sho O9. It has a white "B" on it. What does that B signify?

The pictures below were taken, via the spark plug opening of my engine, with an ENDOSCOPE......... Are these pistons New, Used SBT Pistons, in your opinion?

Thanks

[SBT-Tech 1]

Re: SBT PISTONs for Yamaha fx sho O9

They appear to be SBT pistons.

[RYANO]

Re: SBT PISTONs for Yamaha fx sho O9

What is your opinion of the photos of the pistons

[RYANO]

Re: SBT PISTONs for Yamaha fx sho O9

New or Used in your opinion

[SBT-Tech 1]

Re: SBT PISTONs for Yamaha fx sho O9

hard to say from pictures.
The first picture looks pitted.
How much run time on the engine? Maybe an injector stuck open?

[RYANO]

Re: SBT PISTONs for Yamaha fx sho O9

This is supposedly an FULLY RECONDITIONED engine.

Old parts have been used.

Have a look at the Exhaust Valves