Engine - Custom Bikes by Mike

Breather Valves
12427
12428
Overhead Rocker Arm Oil Lines
Sets of two braided oil lines
12427 Fits 1966 thru 1984 Shovelheads . .$19.99
12428 Fits 1957 thru 1985
Sportster ® models . . . . . . . . . . . . . . .$24.49
U.S. Patent #4,869,213
Engine
28015
28016
RevTech ® Adjustable Breather Valves
Permit the engine builder to alter breather timing to match the displacement of the motor. Increasing
the stroke or cylinder bore changes the total volume of the crankcase. If the breather is not modified,
the cylinders fight the pressure build-up in the lower end that a stock breather cannot relieve.
RevTech ® offers an all-steel breather valve for Big Twins from late 1977 thru 1999. It’s designed to
replace the stock steel or plastic breather valve and with its removable gear, permits you to dial in
the the exact timing needed to ensure proper scavenging. Comes complete with selection of four
different-sized thrust washers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .$69.99
Fits Late 1977 thru 1999 Engines
58076 Stock duration
58077 +10° duration
58079 +10° duration, +.030" oversize
58078 +20° duration
9
Chrome Rocker Oil Lines
Chromed rocker box oil lines for Sportster ®
models and Shovelheads. Includes complete set
of fittings and seals (2 lines).
28015 Fits Shovelheads 1966 thru 1984 (repl.
OEMs 62783-66A, 62785-66A) . . . .$19.99
28016 Fits Sportster ® models (except magneto
models) from 1957 thru 1985 (repl. OEM
17324-57A) . . . . . . . . . . . . . . . . . . . . . .$19.99
Rocker Box Oil Line Fittings
Includes chrome fittings and seals for the rocker
box oil lines on all Sportster ® models and
Shovelheads 1957 thru 1985.
010421 Sold in pairs (repl. OEMs 63527-57A,
63526-57) . . . . . . . . . . . . . . . . . . . . . . . .$6.19
12074 Motor Factory ® oil line sleeves ONLY
(repl. OEM 63529-57) pack of 10 . .$2.09
091210 Athena oil line sleeves ONLY
(repl. OEM 63529-57) pack of 10 . .$3.69
Breather Valves
for Big Twins
Original Equipment plastic
breather valves for Big Twin models.
75201 Late 1977 thru 1999 (repl.
OEM 25310-82A) . .$12.49
Breather Valve Washers
Original Equipment washers for all
Evolution ® Big Twin models from
1970 thru 1999. Packs of 5. .$22.99
75202 0.130"-thick (repl. OEM
25320-82)
75203 0.135"-thick (repl. OEM
25321-82)
75204 0.140"-thick (repl. OEM
25322-82)
75205 0.145"-thick (repl. OEM
25323-82)
75206 0.150"-thick (repl. OEM
25325-82)
75207 0.155"-thick (repl. OEM
25326-82)
75208 0.160"-thick (repl. OEM
25327-82)
75209 0.165"-thick (repl. OEM
25328-82)
S&S Breather Valves
These steel breathers for Big Twins are designed to replace
and outperform their Original Equipment counterparts.
Special Design Features:
• Steel vs. plastic means greater durability and strength.
Particles are less likely to get imbedded in the gear which
can damage the crankcase breather gear cavity.
• A screen vs. slots means better protection. Particles are
stopped from getting to the gear cavity where they may
damage the gears or pump.
• S&S steel gear with welded in screen with larger diameter
holes vs. stock steel gear with screen with smaller holes
held in with a clip means improved air flow/oil scavenging
from the flywheel side.
• Crankcase flywheel cavity vacuum and oil scavenging in
late 1977 thru 1999 engines further improved with synchronizing
refinements.
45845 Breather valve with shims for Big Twin models from
1977 thru 1999 (repl. OEMs 25313-77A,
25313-77B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .$84.99
45716 Breather valve ONLY for Big Twin models from 1977
thru 1999 (repl. OEMs 25313-77A, 25313-77B) . .$64.99
45717 Breather valve ONLY for Big Twin models from 1954
thru 1977 (repl. OEM 25313-73) . . . . . . . . . . . . . . . .$79.64
9.48
Prices appearing in this catalog are Suggested Retail Price and are subject to change*