526 BIG TWIN® EVO® TAPPETS Stop tappet noise forever with big axle “Powerglide™” hydraulic tappets for Evo performance and stock Cams (Will also work with solid style cams) 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. “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 0.0002”. For this reason “Powerglide TM11 tappets have a microfinished bore for the hydraulic unit to glide ove r. ii Powerglicle TM11 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 0.0007” to 0.0012”. For worn out tappet blocks JIMS® is proud to offer +0.002” and +0.005” oversize tappets. Made from billet bearing steel - Evo hydraulic tappet Big axle Powerglide™ Big Twin hydraulic tappet Standard O.D. is 0.8425”. Individual tappet weighs 149 grams. This tappet replaces and surpasses H.D.® #18523- 86 and S&S® #33-5341. 53-0243 Use on Big Twin Single Cam only 84-99, Aftermarket and S & S” engines. Use on Sportster 86-90. Use on Buell’ 87-90. 53-0245 Oversize +0.002” 53-0247 Oversize +0.005” Big axle solid tappet Must use adjustable pushrod. Std O.D. is 0.8425”. Individual tappet weighs 109 grams. 53-0287 Use on Big Twin Single Cam only 84-00, Aftermarket and S&S” engines. Use on Sportster 86-90. Use on Buell’ 87-90. Note: Surpasses and replaces H.D.® #18522-53 toppet and H.D.® #17920-53A hydraulic unit. We recommend using with JIMS® tappet blocks #1095. Standard outer diameter is 0.731“ (Caution some H.D.® blocks 1978- 84 have oil drain hole location problems). 53-0253 Use on Big Twin 53-84 Aftermarket and S&S engine 53-0730 Oversize +0.002” PAN & SHOVEL TAPPETS Hydraulic tappet Superseded by 18522-53. Std. O.D. is 0.731”. Individual tappet weighs 89 grams. 53-0274 Use on Big Twin® 53-84 sold each 53-0281 Oversize +0.002” sold each 53-0283 Oversize +0.005” sold each Note: Use with 51-C30150 hydraulic unit. For solid tappets use #53-0301 53-0304 STD Note: For solid adjustable tappets. Adjusters and nuts sold seperately. The Powerglide™ advantage 1. Longest valve train engine life. 2. Produced from billet bearing steel. The same high quality steel our shafts and crank pins are made from. 3. The best JIMS’ made big axle roller. 4. The ultimate in hydraulic control system, performs better under both the lower and the higher R.P.M. limits, and high spring pressures. 5. A true centerline, for roller life and exact cam timing. 6. State of the art pushrod seat, machined with the same segmented parabolic cup as the JIMS’ roller rockers. Helps eliminate pushrod whip. 7. Engineered on a state of the art cad system, and machined in some of the worlds most accurate precision computer controlled machinery. 8. Hand fit hydraulic unit to a running fit of .0002”, with ultra precision air gauging system. 9. All hydraulic units are tested 100% for function under a simulated pressure test fixture. 10. The best warranty policy in the industry. “Powerglide™” tappets are capable of the highest rpm a Harley® can safely turn about 8025 r.p.m. at a valve lift of. 700 “, with the right valve springs, valves, Cam, oil, etc. We recommend using with JIMS® tappet blocks #53-0046. It is not necessary to use a limiting travel washer in “Powerglide™” tappets. For ALL OUT performance use a hydrosolid tappet. Stop tappet noise forever with big axle “Powerglide™” Hydraulic tappets for Pan and shovel performance Cams (Will also work with solid style cams) Now you can have the same hydraulic function as EVO’s. Are stock hydraulic units wearing you down? Are you installing solid tappets just so you will know what adjustment your tappets are set at? STOP! You need the “Powerglicle™” solution. At about 30% cost savings and about 85% more stability, these tappets are perfect in Panhead and Shovelhead tappet blocks H.D.® Part #18600-53 (front) and #18610-53 (rear). Will also work in any tappet block and case having oil passages to tappet blocks pre EVO. These tappets will accommodate a 0.550” lift or more, depending on the cam base circle size, without modification, when using JIMS® tappet blocks No.1095. If using stock H.D.® tappet blocks, check for roller to block clearances. Use with H.D. No. 17904-66 or JIMS® #2369 pushrods for Shovelhead. For Panhead, use H.D.® #17905-53B or JIMS® #2404 pushrods. Powerglide™ Pan® & Shovel® hydraulic tappet Std. O.D. is 0.731”. Solid Ajustable tappet Superseded by 18492-48. Std. O.D. is 0.731”. Individual tappet weighs 86 grams. Use on Big Twin 48-84 Aftermarket and S&S® engines. Use with Jims® tappet. blocks #1095 or 1095C.
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