ST-2 CAMSHAFT

・Developed in full compliance with FIM World Sports Bike (WSPB) regulations. Specifically engineered to secure a competitive advantage under Balance of Performance (BOP) restrictions and lead the GSX-8R to victory.
・Officially registered as Concession Parts on the FIM World Sports Bike (WSPB) “Eligible Parts for Competition List.”

Technical Note:
The camshaft specifications provided are based on theoretical design values. Due to manufacturing tolerances, slight variations may occur between production lots.

For engine builds requiring maximum precision, we strongly recommend degreeing the cams (valve timing adjustment) individually for each engine to optimize overall performance.

♦ This product is for racing use only.

Specifications

	Intake	Exhaust
Max Lift	9.00mm	8.60mm
Duration	257°	248°
Lobe Center	108°	107°
Minimum Piston-Valve Clearance	0.8mm	1.2mm
Standard Tappet Clearance	0.13mm	0.23mm

Maximum RPM

11,000rpm

Note: These values are based on valvetrain design specifications and do not guarantee proper engine operation.

Set contents

Part No.	Description	Qty.
211-11A-0110	ST-R Intake Camshaft	1
211–11A-0121	ST-R Exhaust Camshaft	1
212-11A-0200	Camshaft Sprocket	2
216-11A-0200	Camshaft Sprocket Bolt	4

By installing all of the components listed below, you will achieve the performance specifications registered with the FIM.

Part Name	Part Number / Note
ST-R Camshaft Set	211-11A-0000
Cylinder Head Gasket t=0.40mm	292-11A-0400
K&N Replacement Air Filter	SU-8023
TST WORX V1 Intake System for Suzuki GSX-8S 2023+ / GSX-8R 2024+-Competition Kit (Manufactured by TST Industries)	–

Critical Technical Requirements

・Valve timing adjustment (degreeing the cams) is mandatory prior to operation. Adjustable cam sprockets are included to enable precise tuning.

・Precise recalibration of the fuel mapping is strictly mandatory. Please be advised that Yoshimura does not supply fuel management systems or technical tuning data for this specific application.