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[BarrySEUltra-103]

Ok guys just looking for some opinions from maybee some builders on here , heres the story

I have a 2006 se 103 ultra i built a 107 with dome pistons  from zippers did the whole 9 yards pump plate cams ect except the crank (stock) and after 700 miles it developed a massive piston knock the skirt was smacking the bottom of the cylinder on up stroke. So i had the stock crank rebuilt trued and welded , rebuilt the motor again now at 1400 miles same problem theres a sticky spot in the crank again. So my question here is am i missing something? Is something causing this orr was it just a bad crank rebuild , the first crank had 60k miles on it so i chalked it up as wear . I was using a thunder max to tune no sign of excessive detonation on plugs or piston tops 🤷‍♂️🤷‍♂️🤷‍♂️

[BarrySEUltra-103]

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[HD Street Performance]

What did zippers say? What brand are the pistons? How long did it take to fail. What was your breakin procedure?

[BarrySEUltra-103]

What did zippers say? What brand are the pistons? How long did it take to fail. What was your breakin procedure?

Carillo (cp) pistons from zippers , havnt had much luck talking to zippers in the past so i have not tried to talk to them since the failure . Break in i do a sequence of heat cycles then a few short rides letting it cool , changed the oil at 25 miles then 100 miles then 500 . Didnt do any highway cruising until it had 300 miles of in town riding up and down in the rpms . I dont think this is a break in failure it had almost 1500 miles on it . Bot failures happened on 5th gear above 100mph