Big Axle Powerglide™ Hydraulic Tappet by JIMS®. Individual tappet weighs 149 grams. This tappet replaces and surpasses H-D® No. 18523-86 and S&S® No.33-5341. The title tells the whole story. Power is what you are after when you've installed a high performance hydraulic cam in your EVO motor. To get full power, you must have zero valve lash, and eliminate collapsing of the hydraulic tappet as found in stock hydraulic units. This is referred to as the shock absorber syndrome. Failing to open the full amount as the cam is designed to do, results in power loss.
Notes
"Powerglide™" tappets are capable of the highest RPM a Harley® can safely turn (about 8025 RPM) at a valve lift of .700", with the right valve springs, valves, cam, oil, etc
JIMS recommend using with JIMS® tappet blocks No.1094
It is not necessary to use a limiting travel washer in "PowerglideTM" tappets
For all out performance use a Hydrosolid tappet
Features
Longest valve train engine life
Produced from billet bearing steel
The same high quality steel JIMS shafts and crank pins are made from
The best made JIMS® big axle roller
The ultimate in hydraulic control system, performs better under both the lower and the higher RPM limits, and high spring pressures
A true centerline for roller life and exact cam timing
State of the art pushrod seat, machined with the same segmented parabolic cup as the JIMS® roller rockers
Helps eliminate pushrod whip
Engineered on a state of the art CAD System, and machined in some of the world's most accurate precision computer controlled machinery
Hand fit hydraulic unit to a running fit of .0002", with ultra precision air gauging system
All hydraulic units are tested 100% for function under a simulated pressure test fixture
The best warranty policy in the industry
Products designed to fulfill the needs of motorcyclists
Expertly crafted from the highest grade materials
Will provide years of dependable service
Made in USA
"Powerglide™" eliminates the shock absorber action. "Powerglide™" is as close to a solid tappet as possible and is still able to compensate for heat expansion.
Glide is what you get when hand matching hydraulic components to a running fit of .0002". For this reason "Powerglide™" tappets have a microfinished bore for the hydraulic unit to glide over. "Powerglide™" tappets are right at home in H-D®tappet blocks, unlike other performance tappets that require special tappet blocks. These tappets will run in cast iron or aluminum tappet blocks. JIMS® recommends fitting the tappets to the blocks with a clearance of .0007" to .0012".
JIMS® is familiar with critical and tight tolerances. Their parts are used and trusted worldwide, on a daily basis, in critical working assemblies. A very unique talent that JIMS has under their roof is their experience with combustion engine development and manual transmissions. JIMS has developed several motorcycle engines and transmissions and produced these products in the thousands. From ground-pounding burnouts, and high-revving scenarios, to everyday commuting, these parts are put to the test before ever being offered for sale.
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JIMS® 2456-1 - Big Axle Powerglide™ Hydraulic Tappet
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