I have no info at all on the bike I know the old owner he bought it on about 300 hours, I've given it some stick in the 30 odd hours I've ridden it, I've been doing some research there's 3 different pistons AB & C how do I know what one I need is it a case if strip the engine down and measure up or is there a print on the one that's in the engine now, sorry I'm clueless at the min 😒