Jims Catalogue

ROCKER ARMS

ROCKER ARM SET - 1.745 RATIO JIMS ® Roller Rocker Arms in a 1.745 rocker ratio. Made with the same high standards as JIMS ® 1.625 stock ratio roller rockers. JIMS ® 1.745 ratio rockers are designed to work with JIMS ® other valve train components and func- tion with JIMS ® total valve train system. Cast from 4340 chromoly and then heat treated for maximum strength. Designed to be used with JIMS ® No.17611-83 Rocker Arm Shafts or equivalent. For a custom valve train set up where a super high lift is required, using a small lift cam, this 1.745 ratio rocker allows the engine builder to achieve more lift at the valve. For more details see No.1731-IS instructions. NOTE: These rockers are not a bolt-in roller rocker. They are designed to be installed by the most advanced engine builder. Modification to the heads and rocker boxes may be necessary to install these rockers.

RACE ONLY

ROLLER ROCKERS - STOCK RATIO 1.625 The best just got a whole lot better!…JIMS ® Roller Rockers are designed to reduce friction in the valve train and provide more horsepower with less heat in the top end. Cast from 4340 chromoly steel and heat treated, JIMS ® Roller Rockers feature a 660 bronze bushing fit to .0007”- .0012”, for the best wear resist- ance and oil control, along with a roller tip made from bearing grade material which reduces valve guide wear and valve tip galling. Other features include a segmented parabolic pushrod cup which reduces friction at pushrod ends and also puts the load on the outer perimeter of pushrod ends. Designed to work in conjunction with other JIMS ® valve train components. Use JIMS ® No.17611-83 Rocker Arm Shafts, or equivalent. These Rocker Arms replace H-D ® No’s 17360-83A & 17375-83A. For more details see No.1045-IS instructions. NOTE: Twin Cam ® rocker boxes require clearancing of the webbing on the valve side. No. 1045RR - Use on all Big Twin 1984-present and aftermarket engines.

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No. 1731 - Use on Big Twin 1984-present and aftermarket engines. Use on Sportster ® 1986-present.

Use on Buell ® 1987-present, except 1125R.

NOTE: Engine builder still has the responsibility of check- ing and confirming the operating clearance when installing any of JIMS ® products.

Use on Sportster ® 1986-present. Use on Buell ® 1987-present, except 1125R.

SHOVELHEAD ROLLER ROCKERS - RATIO 1.50

Complete Valve Train Kit on Page 65

By popular demand, JIMS ® introduces Roller Rocker Arms for Shovelheads (cast from 4340 chromoly steel and heat treated.) Designed to reduce friction in the valve train, providing more horsepower and less heat in the top end. JIMS ® Roller Rockers feature a 660 bronze bushing fit to .0007” - .0012” for the best wear resistance and oil control, along with a roller tip made from bearing grade material to reduce valve guide wear and valve tip galling. Other features include a segmented parabolic pushrod cup which reduces friction at pushrod ends

and also puts the load on the outer perimeter of pushrod ends, with full oil pressure at pushrod tip. Designed to work in conjunction with other JIMS ® valve train components. Use JIMS ® No.17611-66B Rocker Arm Shafts, or equivalent. These Rocker Arms replace H-D ® No’s 17630-66A & 17375-66A. For more details see No.1732-IS instructions. No. 1732 - Use on Big Twin 1966-1984, and aftermarket engines.

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