S&S Cycle Valve-To-Valve Clearances in S&S Shovel-Style Cylinder Heads - Manual

S&S S&S S&S S&S S&S
®
Cycle, Inc. Cycle, Inc. Cycle, Inc. Cycle, Inc. Cycle, Inc.
14025 County Hwy. G P.O. Box 215
Viola, Wis. 54664
Phone: 608-627-1497 Fax: 608-627-1488
email Customer Service: [email protected]
email Technical Assistance: [email protected]
Service Bulletin #33
Revised 7-7-99
Copyright ©, 1999
by S&S Cycle, Inc.
All rights reserved.
Printed in the U.S.A.
Service Bulletin #33
Valve-To-Valve Clearances
in S&S Shovel-Style Cylinder Heads
S&S Shovel-style Cylinder Heads provide adequate valve-to valve-
clearance for S&S 514 and many other high-lift cams. However,
because of different cam lobe profiles, it remains the engine builder’s
responsibility to confirm all clearances, including clearance between
Intake and Exhaust valves and between valve and piston.
Unless high-lift option is specified at time of order, heads will require
modification for S&S 495 cam or any other cam with a TDC lift greater
than .185". In this case heads must be disassembled, material removed
from valve seats, and installed spring height rechecked and corrected
with shims as needed.
S&S recommends a minimum clearance of .040” valve-to-valve
clearance, and .060” valve-to-piston clearance.