What do you guys think happened to this 720

[Andrew Echito]

When I bought this ski, I was told that one of the ocean pro filter elements was sucked into the engine and it took out the top end. Now that I have it a part, I see what looks like evidence of that on one of the domes:

However, after taking a look at the pistons, it seems like there may have been other issues. I've attached some photos.

The old set up was a buckshot head with 33cc domes, a factory pipe, and 44mm carbs on premix. Let me know what you guys think.

 

[Matt Braley]

Wiseco pistons require a little more clearance. Even then the engine needs to be warmed up pretty good before you hammer on it. The engine probably failed because it required race fuel. The damage you see is called detonation.

 

[Andrew Echito]

Wiseco pistons require a little more clearance. Even then the engine needs to be warmed up pretty good before you hammer on it. The engine probably failed because it required race fuel. The damage you see is called detonation.

That's what I was thinking, but I figured I'd ask you folks that have experience lol. Do you think detonation could have caused the damage to the dome? Btw, loved that Rocketship Racing HX build. Thanks for the input.

 

[mikidymac]

No, the damage on the dome is from something metal bouncing around like a broken ring from the last set of pistons.

 

[Andrew Echito]

No, the damage on the dome is from something metal bouncing around like a broken ring from the last set of pistons.

Another legend lol. I enjoyed reading your HX and XP resto's. Appreciate the help.