DK Custom Products

Phone: 662.252.8828
Text: 662.420.4891
Email: [email protected]

Rocker Lockers For Twin Cam w/ After-Market Support Plates

Availability: In stock
Manufacturer: DK/Rocker Locker

Rocker Lockers For Twin Cam w/ After-Market Support Plates Rockout no more ticking

 Get Rid of the Ticking!

Fits Twin Cams that have

Aftermarket Rocker Arm Support Plates


Proudly Made in The USA

by Harley Riders

DK Custom Proudcts



  • Includes - 8 Brass Precision Tapered Bushings
  • Includes - 2 O-Rings 
  • Includes - Washer & Nut for installation
  • Includes - Teflon Centering Tool
  • Locks the Rocker Arm Shafts
  • Centers the Rocker Arm Support Plates
  • Eliminates ticking from Rocker Arm Shaft hitting Plate Bolts
  • Includes Step-by-Step Installation Instructions*


Videos below shows where the annoying ticking is coming from.  (poor HD design)

 This first video has a good before & after sound clip, starting at the 1:57 mark





  • This kit has TWO Sets of Rocker Lockers.  This is because various aftermarket rocker arm support plates, like some of the SE, the S&S and Woods vary in depth.  If you have non-stock Rocker Arm Support Plates, this kit is for of the sizes included will fit.
  • The rocker arm shafts have a notch in them that the bolt is supposed to butt up against, locking the rocker arm shafts in place.  However, the bolt hole is too large, leaving a gap.  This gap allows the shaft to rotate and hit the bolt causing a tick.  
  • See the picture below of where the bolts have witness marks from the rocker shaft rotating and tapping the bolts.  This is what makes the annoying ticking/tapping noise.
  • The Rocker Lockers eliminate the gap, locking the shaft from turning and striking the bolt, eliminating that annoying tick so many Twin Cam owners experience.
  • The Rocker Lockers also center the rocker plate so that it is always located in the same position eliminating different wear patterns on the rocker arm/valve and a better alignment of the pushrod in the holes.
  • The Rocker Lockers are tapered so that they lock themselves in and wedge the bolt/shaft in place.


~See the Pictures ~

Drawing shows how the Teflon Centering Tool Makes installation Easy!


Have you tried changing cams, replacing lifters, adjusting pushrods, different oils and still have that annoying ticking?  Try the Rocker Lockers, they will eliminate the ticking from the rocker arm shaft. (this is the most annoying of the valve train noise, and is particularly noticeable between 2000-3000 RPM)


Please note~

Rocker Lockers will not quiet noisy lifters, noisy chains, gears, tensioners or bearings. Rocker lockers keep the shaft from rotating and hitting the Rocker Support Plate bolts.

If you ever need to remove the lockers, just use a punch and tap them out, they are usually reusable.

Patent Pending


Twin Cam Engines that have Aftermarket Rocker Arm Support Plates, like the S&S, Woods & others.

See Rocker Lockers for Stock Twin Cams, Sportsters, & Big Twin Evo Motors HERE

 * While Step-by-Step instructions are included, it is recommended to also supplement them with the Service Manual.




Customer Reviews

Rocker Lockers for Screamin Eagle Review by Tom
These fit the Screaming Eagle rocker support perfectly. I had the rockers apart so figured I would be certain there was no chance of shaft rattle. Easy to install and motor is very quiet. Don't know if these helped but for $18 I'm not sorry I installed them to be certain. (Posted on 3/21/2019)

Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.