background image

Instruction Sheet For #25254-93A

Polished Billet Cam Cover

1993-Up Big Twin Models

Refer to H.D.® service manual 
for specifications.

Note: Read entire instruction 
sheet before doing the job.

Rev C

2/96

25254-IS

1.  Start with a clean motor and also a clean area to 

work in.

2.  Remove old cam cover per H.D.® service manual.  

Be sure to disconnect the battery ground wire.

3.  Remove wires from the coil  on 1973 to 1979 mod-

els and on 1980 to present remove sensor wire 
using JIMS® tool  #2121.

4.  Pull wires through old cam cover.
5.  Push ignition wires through hole in new outer cover 

and install connector then set aside for now.

6.  Remove all old gasket material from motor case.
7.  Next if your cam shaft end play was to specifications then measure the height of the old cam bush-

ing from cover base to top of bushing, it should be approximately .060  +/-.001. JIMS® cam 
cover bushing will be the same. If your old  bushing is different determine the difference and shim 
cam as needed, see H.D.® service manual.

8.  If you would like to check the centerline of your cam do so as follows: remove nut on pinion shaft 

with JIMS® tool  #94555-55A prior to 1993. Remove pinion gear from shaft using JIMS® tool 
#96830-51.  With cam shaft in motor, all  shims off cam, and with your new  JIMS® cam cover in 
hand, lube bushing. seal and the two dowel pins on motor case.  Set cam into inner bearing, slip 
cam cover over end  of cam, push into the two dowel pins. Lube the 6 mounting screws  provided 
in kit 1/4-20 x 1-1/8, torque to 90 inch/lbs. Turn cam with fingers 360 degrees from all the way 
to the inward position to all the way outward position. Cam should turn freely without any tight 
spots. If your cam does have a tight  spot or will not turn recheck  cam to bushing specifications 
see H.D.® service manual. If bushing and cam are to specs you have a possible centerline 
mismatch from inner cam bearing to cam cover. To fix this remove cam cover bushing, install new 
JIMS® bushing #25581-70  with JIMS® tool #1012-70TB and ream from your motor case with 
JIMS® cam line reamer tool #1023-70.  It is also possible that your pinion bushing centerline  may
be off. If you are replacing cam bushing do the pinion bushing also. Remove pinion bushing with 
JIMS® tool #95760-TP, reinstall with JIMS® tool #1013-54TB and line ream with JIMS tool 
#94805-57.

9.  Using your favorite gasket sealer place gasket on motor case, followed by your new cam cover 

with assembly lube in  both bushings and the sealing lip of seal and just a tad on the two dowel pins.

“FROM THE TRACK... TO THE STREET!”

555 Dawson Drive, Camarillo, CA  93012 • Phone 805-482-6913 • Fax 805-482-7422 • www.jimsusa.com

Отзывы: