Both Wiseco & ProX rod kits are available, however the pin is too long and needs to be ground to the correct length. The trick is to use Wiseco #8160 rod kit listed for ATC250 2T, the pin is a couple of mm shorter than std but you don't have to root around shortening the other one. Pistons are easy, but be careful if you still have the standard chrome bore, as they require different rings.
K