JIMS Powerglide™ Steady Roll Tappets — 0.8420" diameter, hydraulic, standard – 84-98 Touring, 85-99 Softail, 92-98 Dyna, 84-86 Big Twin, 84-94 FXR, 99-00 CVO, 86-90 Sportster

🔧 Powerglide™ Steady Roll Tappets combine the Powerglide advantage—an oil‑fed axle, billet steel body and precision‑fit hydraulics—with a Steady Roll bronze bushing in place of the needle bearing roller for improved durability and smooth operation.

• The same Powerglide advantage, now with a bronze Steady Roll bushing replacing the needle bearing roller.
• Extensive development to increase load, lubrication, hydraulic and service life capacities.
• Billet body and increased roller width; roller perpendicularity held to .0002" for precise contact.
• Hand‑honed hydraulic unit cavity for consistent hydraulic performance.
• Dynamic load capacities increased over 30%.
• Lubrication capacities improved: hydraulic unit and valve train (top end) +10%, roller, cams and cam bearings +100% for increased cooling.
• Made in the U.S.A.

These tappets are engineered for high‑load valve train applications where superior lubrication, cooling and durability extend service life and reliability.