This is the FX upgrade to the Factory Effex bestseller - the B3. The B4 features all new high-durability Super Grip seat material to keep you in place, and heavy-duty DuraTechTM ballistic nylon reinforcements to prevent knee brace wear.
The seat includes raised OEM logos, just like the TC4. Track-tested by the FX face teams, the B4 is the pro riders' seat of choice.
Available for YZ250F/450F 2006 to 2011.
