NOTE: I just copied this from "The Garage" because I think it is more relevant in this forum. I googled this and searched ADVrider and IBMWR and I couldn't find anyone having discussed this yet, but it seems like it is worth considering: Success: Soaking piston in carb cleaner removes carbon very well. Failure: Soaking wrist pin (gudgeon pin) in carb cleaner removes chrome very well. Solution: Call re-psycle for a good used wrist pin. 11 25 1 335 474 GUDGEON PIN - 22mmOD X 13mmID X 74.31mmL What arrived happened to be what I figure is an oilhead wrist pin. 11 25 1 341 365 GUDGEON PIN - 22mmOD x 17.5mmID x 74.31mmL. It looks like it would fit just perfectly. The original wrist pin is 147grams, the oilhead wristpin is 83grams. Weight savings of 64g of reciprocating mass per piston. Now I need to decide whether to send this back and order a proper airhead wrist pin, or keep it and ask for another oilhead wrist pin for the other side. Question#1: Is there a heat/stress reason that the oilhead wrist pin shouldn't be used in an airhead? Question #2: Why hasn't this been discussed before (or is my Google-Fu just not up to snuff)?