Piston question

[biggun6ss]

What would cause a piston to have little pits on the top. A buddy of mine who isn't very smart has blown his top end about three times this year. He always silicons his intakes when they leak so I am thinkiong he is lean. He has 2004 LE with port work, cool head, fmf fatty pipes, and clamp ons. Everything else is stock.

[Ducman]

Little pits are probably from detonation. He is probably lean, running too much timing, not using enough octane fuel, or a combination of the 3 things I listed that can lead to detonation.

[8buck]

Little pits are probably from detonation.  He is probably lean, running too much timing, not using enough octane fuel, or a combination of the 3 things I listed that can lead to detonation.

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I AGREE

[3ban5shee0]

Little pits are probably from detonation.  He is probably lean, running too much timing, not using enough octane fuel, or a combination of the 3 things I listed that can lead to detonation.

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word

[biggun6ss]

It has to be the octane and being lean. He hasn't advanced it any, still has stock timing plate. I have told him this before but he just keeps shelling out money on rebuilds.

[2003LimitedBanshee]

It always amazes me how many two stroke guys (not just shees) blow stuff up, or how many 4 strokers cuss 2's because they think they are grenades. Agree on the octane/detonation, and/or jetting. Top ends don't just spontaneously explode/implode, there has to be a reason, and those would top my list of suspects as well.