JIMS Box 3 1208-1353 (all models of 120, 131, or 135 Alpha, Beta and EVO Mount Engines (Including Kits) User Manual
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555 Dawson Drive, Camarillo, CA 93012 Phone 805-482-6913 • Fax 805-482-7422
2
Rev I
9-12
No.1208-1353
A Division of Thiessen Products, INC
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Note: Each bolt has a lock patch on its threads and additional Loctite is not required.
• Place the lower rocker-housing gasket onto the cylinder head (clean & burr-free).
• Make sure you install the gasket so it covers the breather channel.
• If the channel not covered, turn the gasket over.
• Place the rocker housing on the gasket (clean & burr-free).
• Thread the two longer bolts H.D. 3693A through the left side of the lower rocker housing,
nearest the valve springs, and into the head. (See Fig. 1, bolts 2 & 3).
• Thread the remaining bolts H.D. 3736A through the lower rocker housing and into the head.
• Torque the bolts to 10 - 14 ft-lbs (120 - 168 in-lbs, 13.6 - 19.0 Nm) See Fig.1
• Follow the pattern shown in Fig. 1.
• Torque in two stages using about half the final torque the first time.
• Repeat these steps for the second lower rocker housing.
STEP 2: Rocker Arms - Installation
• Obtain:
• The O-ring for the breather baffle hole in the lower rocker housing No.11270.
• A rocker arm support plate No.1208-1303.
• One intake and one exhaust rocker arm. They are different from one another. Their part num-
bers are laser-marked on each rocker arm for easy identification. See Fig. 2.
• Two rocker arm shafts No.17611-83.
• Two (Allen head) and two (flanged hex head) rocker arm support plate bolts.
• Lubricate the rocker arm bushing with the supplied assembly lube.
• Lubricate the rocker shafts with the supplied assembly lube.
• Lubricate the O-ring with a thin film of clean Harley-Davidson 20W-50 engine oil and install
it into its groove in the lower rocker housing. See Fig. 1 & 3
• Lay the rocker arm support plate in position on the head.
• Position the exhaust and intake rocker arms. See Fig. 2
• Slide the rocker shafts into the rocker arm support plate, capturing the rockers. See Fig. 2.
• Be sure that the notched-end of each shaft is toward the right side of the engine. See Fig. 2.
• Thread the two Allen head bolts (2019P with washer 1216) through the left hand side of the
support plate and into the head. (screws and washers supplied with rocker support)
See Fig. 2.
• Thread the two remaining hex head bolts No.1286-1310 through the right side mounting
holes of the plate and into the head.