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Athena 144 piston kit (extra parts)

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just putting together a 144 kit in a 06 yz 125 and the Athena piston kit comes with 2 small pins in a sealed bag. Anyone know what they are for?????

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Thanks Harrperf, that was it, should have known. Stock doesn't have them. On a side note what do you run for ring end gap on these. Athena didn't say.

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Put it this way...I have yet to see a set that requires more gap.

but about .009-.010 inch

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Thanks, mine measured out at .020 so left it as is. Okay 1 last question since you know these kits. Typicaly do you need to jet up or down with the 144cc from 125? Any sea level baseline. Thanks again

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Put it this way...I have yet to see a set that requires more gap.

Same here. In forty years of messing with bikes and cars I have almost never seen a tight ring gap. Maybe once.

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At sea level and 60 degrees on pump a 440 main and 40 pilot needle one clip richer.

Race fuel jet down two on the main.

Colder - every 15 degrees go up a main

Opposite hotter.

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