Billet 4 Piston Brake Caliper - Replaces Formula Rear Caliper - Big Minis / Reeg MX 420 Really wakes up the stock

Really wakes up the stock motor or can even be used to make the most out of the 143cc bore

Universal mounting system using MOLLE style webbing and 4 velcro straps (included)

See FMF Website)

Yamaha WR250F 2001-2005

Self-binding at neck and armholes

Billet 4 Piston Brake Caliper - Replaces Formula Rear Caliper - Big Minis / Reeg MX 420 Really wakes up the stockThe Moto Master MXJ 50 65 Caliper doubles the brake pad size, resulting in a more powerful brake and longer life span of the brake pads. This also helps tremendously to prevent brake fade in a race setting. 4 piston caliper, CNC machined out of billet aircraft aluminum, black anodized and laser marked Compact, rigid design offers a significant increase in power and reliability over original Caliper pistons are equipped with a magnet for optimal brake