Jims PowerGlide Steady Roll Tappet

It is no secret to Jims (and to top engine builders) that performance V-Twin engines require more valve lift than stock designs. This increases the load on the tappet roller, which can lead to failure. Tappet roller failure is a catastrophic and expensive failure. Broken needle rollers allow the tappet roller to deform, causing cam lobe damage. Pieces of the hard rollers, as well as debris from the cam can easily contaminate other parts, such as cam plates, bearings, oil pumps, and other tappets ultimately resulting in a complete rebuild. To remedy this, Jims has replaced the needle rollers with a special bronze alloy bushing, resulting in increased reliability and longevity. No longer do you need to worry about needle rollers and debris damaging the engine in the event of a failure. In addition to this, Jims has invested in machinery that controls the hydraulic unit fitment tolerance within .00015". This failsafe design means that, even if the bushing wears out, it will be retained in the tappet assembly.

• Incorporates a steady Roll bronze bushing in place of the needle bearing roller
• Increased load, lubrication, hydraulic and life capacities
• Billet body
• Increased roller width
• Roller perpendicularity held to .0002" tolerance
• Hand-honed hydraulic unit cavity
• Dynamic load capacities increased over 30% when compared to stock
• Lubrication capacities for hydraulic unit and valve train (top end) increased 10% compared to stock
• Lubrication capacities for the roller, cams and cam bearings have increased 100% for increased cooling capacity and greater reliability
• Sold individually
• Made in the USA