S&S Connecting Rods Installation Instructions

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Filed Under (S&S) by admin on 29-10-2010

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1. Female rod crankpin end to mainshaft nuts – .030″ minimum clearance recommended. A. Install sprocket shaft and crankpin in driveside flywheel. Snug nuts only. Do not torque to final specs. B. Slide connecting rods and bearings over crankpin. C. Rotate rods on crankpin, and observe clearance between rod and sprocket shaft nut. D. If additional clearance is needed, remove material from sprocket shaft nut. Do not remove material from connecting rod. E. Repeat procedure for camside flywheel and pinion shaft. 2. Female rod crankpin end to inner flywheel rim – .060″ clearance recommended. A. While checking female rod to mainshaft clearance, observe clearance between crankpin end of female rod and rim of both flywheels. B. If additional clearance is required, remove material from flywheel at point of contact. Do not remove material from connecting rod. 3. Wristpin end of both female and male rods to flywheel edge -.060″ minimum clearance recommended. A. While checking female rod to mainshaft clearance, observe clearance between wristpin end of both rods and rim of both flywheels. B. If additional clearance is required, remove material from flywheel at point of contact. Do not remove material from connecting rod. 4. Wristpin end to crankcase and cylinder – .060″ is recommended in these areas. A. With the camside flywheel and rods mocked up, install the assembly in the right crankcase half with pistons (less rings) and cylinders in place. B. Rotate flywheel through one full revolution and check for rod to crankcase and cylinder spigot contact on both the front and rear of each cylinder. C. File or grind crankcase or cylinder spigot as needed to achieve .060″ clearance. Do not remove morematerial than needed. D. Repeat for left crankcase half. NOTE: Whenever clearancing is performed in any of these areas, do not remove any material from the connecting rods as clearancing on the rods may unnecessarily weaken them. Make adjustments to the point of contact on the mainshaft nut, flywheel rim, crankcase, cylinder spigot, etc. Connecting rods weakened by clearancing may fail causing serious engine damage.

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