4. Shown is the TIG-welded balance shaft drive sprocket on a stock B-motor 4-3/8-inch stroker crank. Charlie checks the crank for true after welding and, if necessary, can service a shifted crank.4. Shown is the TIG-welded balance shaft drive sprocket on a stock B-motor 4-3/8-inch str 5. A serviced crankshaft assembly is trued to within .0005 inches when checked at both ends of each mainshaft.5. A serviced crankshaft assembly is trued to within .0005 inches when checked at both en 6. Shown is a JIMS 120ci B-motor. Charlie disassembled the engine's bottom end to lighten the balance shafts. Note the fore and aft counter-balance recesses (red arrows) and ball bearings for the balance shafts (blue arrows). Assembly of the counter-balance system starts by installing the flywheels into the left case Timken bearing.6. Shown is a JIMS 120ci B-motor. Charlie disassembled the engine's bottom end to lighten 7. Next, the balance shafts are installed in the fore and aft ball bearings in the left case (red arrows). The shafts are identical and interchangeable.7. Next, the balance shafts are installed in the fore and aft ball bearings in the left c 8. Now, a triangular balance shaft support is installed on the end of each balance shaft (red arrows). Each support includes a ball bearing that supports the right side of the balance shaft (blue arrows).8. Now, a triangular balance shaft support is installed on the end of each balance shaft 9. The large chain guide support is now installed on the triangular balance shaft supports and secured with six bolts (three per support). The six bolts secure the two balance shafts, two supports, and the chain guide support to the left case.9. The large chain guide support is now installed on the triangular balance shaft support « | 1 | 2 | 3 | » | View Full Article By William Denish Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!
