Sorry Juice Moto, looks like we gotta lighten up our pistons another way (Reeds, balance, true and bearings are your only options to reduce vibrations, sadly, reeds will have the biggest effect making your sweet spot much longer and higher up in the range, balance will have a good effect but only move your sweet spot, does not make it longer. So the verdict: as good as it may sound, do not use the titanium wrist pin or risk catastrophic damage to your engine. Apparently the wobble got so bad the piston caught a transfer and ripped a good chunk of the wall off (he provided pictures). Apparently the piston wore through it rather quickly, and when the motor heats up, the aluminum expands at 4x the rate the titanium does! That means mean your motor is toasty warm and ready to go, that pin is barely holding on. So upon chatting with some guys in the Facebook group Motorized Bicycle Gallery, someone has tried the titanium wrist pin, and with disastrous results.
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