Top end parts needed to convert your Athena 392cc big bore to a 421cc stroker

Wiseco 68mm forged pistons (Pair)

Nitrite coated piston rings

Chrome wristpins

Circlips

Billet 24cc custom cut stroker domes (Pair)

Cometic top end gasket kit

Cool head O-ring kit

Heavy duty wristpin bearings (Pair)

Works with a 4mm stroker crankshaft

Runs on pump or race gas

No case or head mods required – THROW OUT THAT SPACER PLATE TOO!

– The Best Parts. The Best Performance. The Best Price.

BRAPPPPPPPPPP!
573M06800, 10-301, B1005, B0627020F, B0627012F, IR019018AFM, PD909