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Tappet Guides and Tappets

Tappet Guides and Tappets

Tappet Guides for Flatheads
Tappet Guides for Flatheads
Accurate reproductions of the front and rear cylinder tappet guides as used on Big Twin and 45 cui. Flatheads.
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Cannonball Knucklehead Tappet Guides
Cannonball Knucklehead Tappet Guides
Knucklehead tappet guides are rare bits and examples, that are still in good working condition, are almost impossible to find.
But help is on the way: Cannonball tappet guides are cast and meticulously machined in Germany to OEM specs and fit OEM and Cannonball Knucklehead cases. Just paint or coat them and you're ready to go.
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Tappet Guides for Panhead and Shovelhead
Tappet Guides for Panhead and Shovelhead
Front and rear tappet guides use as stock replacement. Each kit contains both lifter blocks and two sets of allen bolts for cases 1948-early 1976 (1/4”-24) and late 1976-1984 (1/4”-20).
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Tappet Guides for Evolution Big Twins
Tappet Guides for Evolution Big Twins
These cast aluminum tappet guides fit all Evo Big Twins from 1984 to present.
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S&S Tappet Guides for Evolution Big Twin
S&S Tappet Guides for Evolution Big Twin
These tappet guides are designed to be stronger, wear better, and last longer than the original counterparts. Use them as stock replacement for OEM  lifter blocks #18623-85A and 18622-85A or to complete your Evo Super Stock crankcases and cylinder heads. Burnished aluminum finish.
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Jims Tappet Guides with Power Glide Tappets Panhead/Shovelhead
Jims Tappet Guides with Power Glide Tappets Panhead/Shovelhead
CNC machined High Performance tappet guides for 1953-1984 Big Twins made from polished, billet 7075-T651 aluminum. Designed to accommodate cams with lifts up to .550“. They come ready-to-install with a set of Power Glide tappets. Mounting holes are flat countersunk.
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Screw for Tappet guide Big Twins late 1976-1999
Screw for Tappet guide Big Twins late 1976-1999
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Tappet Guides for Twin Cam
Tappet Guides for Twin Cam
These cast aluminum tappet guides fit all Twin Cam models from 1999-2017.
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S&S Tappet Guides for Twin Cam
S&S Tappet Guides for Twin Cam
The S&S version: Lifterblocks CNC machined from aluminum and polished. Fit stock or S&S engine cases. With chromed socket head hardware.
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Jims Tappet Guides for Sportster →1985
Jims Tappet Guides for Sportster →1985
Top-quality lifter blocks For all 1957–1985 Sportster models which provide improved tappet lubrication.
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S&S Tappets for Knucklehead
S&S Tappets for Knucklehead
These tappets include adjusting screw and locking nut.
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Jims Tappets for Hydraulic Units Panhead and Shovelhead
Jims Tappets for Hydraulic Units Panhead and Shovelhead
Stock replacement tappets by JIMS which accept the standard Panhead/Shovelhead hydraulic units.
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Solid Lifter Adaptor
Solid Lifter Adaptor
For all Big Twins from 1953–84. These adaptors replace the hydraulic units and work with all OEM type adjustable pushrods. A simple, low cost possibility for solid lifter conversion. IH (installed height) indicates how high the pushrod is positioned above the tappet.
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Tappets OEM Replacement for Evolution and Twin Cam
Tappets OEM Replacement for Evolution and Twin Cam
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S&S Tappet for Evolution Big Twin and Sportster
S&S Tappet for Evolution Big Twin and Sportster
These hydraulic tappets feature numerous significant design improvements and are perfect for stock replacement as well as high performance applications. A 3.12mm larger inner bearing race reduces stresses to increase axle, bearing, and roller life. A redesigned plunger assembly better withstands forces associated with heavy-duty valve springs and cams typically used in high-performance applications. Another feature is a revised metering device which precisely controls oil delivery to top end, insuring rapid lifter pump-up and reducing possibility of oil starvation to bottom end. Each lifter body and plunger assembly is hand-fit and then pressure-tested to insure correct operation.
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Jims Hydrosolid Tappets
Jims Hydrosolid Tappets
These tappets perform like a hydraulic tappet from start up to about 5.500 rpm and then turn into a solid up to the rev limit. What this all comes down to is that about the time your springs start to surge at high rpm and go into harmonic distortion the tappet rollers start lofting off the back side of your cam. With JIMS Hydrosolids you can be at ease knowing that they will not pump up allowing your valves to hit each other or the piston with consequent disaster. This is very critical in high performance engines with big valves and high lift cams.
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S&S Semi Solid Adaptor for Evolution Big Twin
S&S Semi Solid Adaptor for Evolution Big Twin
These adaptor rings limit the travel of the stock hydraulic units. = They work like solid lifters at high rpm while retaining regular hydraulic function under normal conditions. Recommended when stronger valve springs are used. Installation of these adaptors require adjustable pushrods.
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Jims Solid Tappets
Jims Solid Tappets
Early Panheads and Ironhead XL were originally equipped with solid lifters with adjuster screws. In later engines solid tappets are installed for racing/performance purposes and require matching pushrods.
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Jims Powerglide Tappets
Jims Powerglide Tappets
High rpm, hot cams and increased spring weights in High Performance engines means increased demand on the tappet and tappet roller. JIMS Powerglide tappets were developed to meet this challenge.
The billet steel, CNC-machined tappet body with hand-honed cavity holds a superior hydraulic unit. The total dynamic load capacities have been increased over 30% straight across the board.
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Needle Baerings for Tappets
Needle Baerings for Tappets
Replacements for worn out bearings on all Harley tappets from 1929–up. Available as rebuild kits with one bearing and rivet for one tappet or as a complete kits for four tappets.
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Adjuster Screws for Pushrods and Valves
Adjuster Screws for Pushrods and Valves
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Hydraulic Unit for Tappets
Hydraulic Unit for Tappets
The stock replacement hydraulic unit for all Big Twins from 1953–1984.
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Jims Powerglide Steady Roll Tappets for Twin Cam
Jims Powerglide Steady Roll Tappets for Twin Cam
High lift cams and strong valve springs substantially increase the loads on the tappet rollers, which can lead to failure of stock components. Then the broken needle rollers will likely destroy your oil pump and the deformed roller will damage your cam lobe. Ultimately, a complete engine tear down and oil system flush are required to remedy this. The Powerglide Steady Roll tappets have the needle rollers replaced with a special bronze alloy bushing and the improved roller attached to a proven “Powerglide” tappet. This combination results in significantly increased reliability, longer life and quiet operation. The failsafe design means even if the bushing wears out, it will be retained in the tappet assembly.
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Related Topics

Hardware - Hardware Kits - Hardware Kits for Lifter Blocks
Hardware - Hardware Kits - Hardware Kits for Lifter Blocks

Tappets and their guides

Tappets transmit the movements of the cams. They convert the circular movement of the cams into a linear movement that is passed on to the valves.

In the air-cooled V-Twin engines from Harley-Davidson, roller tappets have performed this task since the side valve engines of 1929, with a few exceptions. The tappets are perpendicular to the axis of the camshaft and the movement is transmitted directly. The tappets are guided in separate components with precise bores, the tappet guides. These guides can be replaced separately in the event of wear. On models without hydraulic valve lash adjustment, the tappets have adjusting screws for the valve lash. On the tappets of the large Twins from 1952 onwards and the Sportster from 1986 onwards, the tappets house the hydraulic compensation units for the valve clearance.

Have any questions?

Our service team will be glad to help out: Mondays - Thursdays 08:00-17:00 CET, Fridays 08:00-16:00 CET, Phone: +49 / 931 250 61 16, eMail: service@wwag.com