FBI DIAMOND CUT 120" Performance Twin Cam A Evo Mount Race Engine by JIMS® for 91-98 Touring and Dyna®, 91-99 Softail®,

EVOLUTION® MOUNT TWIN CAM® RACE ENGINE JIMS® R&D Department has developed 131” and 120” Twin Cam® Race Engines that bolt directly into Evolution® motor mount style frames. Now the reliability and performance of Twin Cam® technology is available for most OEM Harley-Davidson® applications back to 1991, as well as most custom frames for Evolution® engines.

Engineering Valve Train: Valve train loads are much higher in a racing engine like the JIMS® 131” or 120” than a stock Harley® engine. Cam lobe designs are more aggressive with higher lifts and acceleration rates. Valve springs must have higher rates and seat pressures for reliable control. And, these heavier, stiffer and more aggressive parts must run at high rpm. JIMS® has been developing and manufacturing racing-quality valve train parts for decades and is using this experience in the JIMS® Race Engines Kit.

Tappets: JIMS® manufactures its proven PowerGlide™II tappets to very high standards of fit and finish. The very close fit between the tappet body and hydraulic unit ensures that the tappet stays pumped up under the stresses of high rpm use. There is no higher quality tappet.

Rocker Arms: JIMS® Roller Rockers overcome another racing valve train difficulty – side loads on valve stems and valve guides. High rpm and heavy valve spring pressures can result in high side loads which; in turn, accelerates wear. JIMS® roller-equipped rocker arms reduce this loading. Connecting Rods: JIMS® connecting rods are enormously stiff, strong and reliable. They are forged from race-proven SAE 4340 steel. Every surface is then machined in CNC work centers to ensure that both static and dynamic balancing meets engineering design standards. The various heat treat, machining and grinding procedures are carefully followed by JIMS® dedicated and independent inspection team to ensure the highest quality final product. JIMS® also has exclusive use of the standard Harley-Davidson® crank pin and crank pin bearings. These are the highest quality connecting rod bearings available.

Timken® Bearing: JIMS® uses the traditional Timken® tapered roller bearing assembly on the left side of the JIMS® engines. This bearing is more tolerant of the crankshaft flexing that is normal at high rpm. Experience in the field indicates that this traditional Timken® back-to-back set is more durable.

Engine Cases: The JIMS® Race engine cases are stronger, tougher and more versatile than a stock engine case. We didn’t simply add metal here and there. We considered the greater load requirements of the larger racing engine and designed accordingly. Our case set has thicker walls, stronger stud bosses and, larger radius corners.

FAT BAGGERS, INC. HAS A COMPLETE OFFERING OF 120" AND 131" PERFORMANCE RACE ENGINES EXCLUSIVELY BUILT BY JIMS AND HAS SPECIALIZED IN PERFORMANCE UPGRADES ON BAGGERS FOR YEARS. CALL FOR MORE INFORMATION ON BLACK, SILVER OR DIAMOND CUT FINISHES, ON BIG BORE KITS AND ON COUPLING THESE GREAT MOTORS WITH A PROCHARGER SUPERCHARGER.

AVAILABLE TWIN CAM ENGINES INCLUDE: * 1208-3530 FBI 120" TC A Engine, 99-06 Touring & 99-05 Dyna®, Black * 1208-3535 FBI 120" TC A Engine,99-06 Touring and 99-05 Dyna®, Silver * 1208-3530D FBI 120" TC A Engine, 99-06 Touring & 99-05 Dyna®, Black Diamond Cut * 1208-3535D FBI 120" TC A Engine,99-06 Touring and 99-05 Dyna®, Silver Diamond Cut * 1608-3530 FBI 120" TC A Engine, 07-Pres Touring and 06-Pres Dyna®, Black * 1608-3535 FBI 120" TC A Engine, 07-Pres Touring and 06-Pres Dyna®, Silver * 1608-3530D FBI 120" TC A Engine, 07-Pres Touring and 06-Pres Dyna®, Black Diamond Cut * 1608-3535D FBI 120" TC A Engine, 07-Pres Touring and 06-Pres Dyna®, Silver Diamond Cut * 1808-3530 FBI 120" TC Engine, Evo Mount, 91-98 Touring and Dyna®, 91-99 Softail®, Black * 1808-3535 FBI 120" TC Engine, Evo Mount, 91-98 Touring and Dyna®, 91-99 Softail®, Silver * 1808-3530D FBI 120" TC Engine, Evo Mount, 91-98 Touring and Dyna®, 91-99 Softail®, Black Diamond Cut * 1808-3535D FBI 120" TC Engine, Evo Mount, 91-98 Touring and Dyna®, 91-99 Softail®, Silver Diamond Cut