Detonation in my SXZ

[GSX1100SXZ.JP]

76730737_549256959227588_6846526406420070400_n by Takahiro Ikehara, on Flickr
76751786_2396579350554959_2037472347090321408_n by Takahiro Ikehara, on Flickr
76775074_1362798820546142_8691032358301728768_n by Takahiro Ikehara, on Flickr
76931544_1037128243300957_3157637330131484672_n by Takahiro Ikehara, on Flickr
79209435_651089625422330_6413486371750543360_n by Takahiro Ikehara, on Flickr

 

[Tomcat]

Ouch!
That's got to hurt Takahiro

 

[GSX1100SXZ.JP]

Hi Tomcat, repair is over. Mechanic says the carburetor body is worn.

 

[Kiwialfa]

Wow!!! Takahiro san.

The last time I was anything like this was a racing two-stroke that holed a piston. I've read that the detonation shock wave had the same force as a hammer blow. But never seen the proof until viewing your pictures. So it was running lean on that cylinder?

 

[GSX1100SXZ.JP]

Hi Darryl san.

I don't know for sure, but it might be running lean on that #2 cylinder. The mechanic told me that the #2 cab body was worn. Until this engine failure I used D8EA, but I may need to change to D9EA like E27.