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Harley-Davidson Twin Cam Engines Cam Chain Drive System Installation and removal MANUAL

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Filed Under (Harley Davidson) by admin on 27-03-2012

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Removing the Cam Chain Drive System. NOTES Changing camshafts and cam drives in the 2006-up Harley-Davidson® Twin Cam 88® engines is different than in pervious engines. Procedures require use • of some special tools. Installation should be done by an experienced mechanic with access to factory service manual and required tools. Tighten all fasteners to the correct specifications and in order described. Always use an accurate torque wench. • Incorrect installation can cause engine damage not covered under warranty. CAUTION Failure to install components correctly can result in sudden engine seizure. Engine seizure may result in serous injury to motorcycle operator, passenger, or others. A- Disconnect the battery ground cable to eliminate potential sparks and inadvertently engagement of the starter while working on the motorcycle. B- Remove spark plugs and pushrod cover clips. Collapse the pushrod covers to expose the pushrods. C- Safely elevate and stabilize the rear of the motorcycle. Place the transmission in high gear. Turn the rear wheel to rotate the engine until both lifters and pushrods for either cylinder are at the lowest point on the camshaft (TDC of compression stroke). Both intake and exhaust pushrods for that cylinder will be under pressure from the valve springs and will rotate with light finger pressure. NOTE: 510G camshafts may use stock style non-adjustable pushrods instead of adjustable pushrods. If installing non-adjustable pushrods, disassemble and assemble rocker boxes per H-D® instructions. All other S&S® gear driven cams require installing adjustable pushrods. As a time-saving measure, the stock pushrods can be removed with bolt cutters. Be sure to head caution and warnings of these instructions. D- Cut the pushrods for the cylinder that is at TDC with the bolt cutter and remove the pushrod covers from the engine. Rotate the engine to place the pushrods for the other cylinder at their lowest point. Cut and remove the remaining pushrods. WARNING CAUTION Cutting pushrods with a saw or cutoff wheel may result in debris entering the engine, causing engine damage not covered under warranty. WARNING Cutting pushrods without releasing spring pressure, by rotating the engine until tappets are at the lowest point of travel can result in bodily injury. E- Remove the pushrod covers and lifters form the crankcase. F- Remove engine cam cover and gasket. Secure lifers with a tool made from a large binder clip

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HARLEY DAVIDSON SCREAMIN' EAGLE TWIN CAM 103 (1690 CC) CONVERSION KIT INSTALLATION MANUAL

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Filed Under (Harley Davidson) by admin on 19-02-2011

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REMOVAL When servicing the fuel system, do not smoke or allow open flame or sparks in the vicinity. Gasoline is extremely flammable and highly explosive, which could result in death or serious injury. (00330a) 1. Remove maxi-fuse. Refer to MAXI-FUSE INSTALLATION in Service Manual. 2. Remove existing air cleaner assembly. Discard filter element, backplate, and air cleaner cover insert but save remaining parts. Refer to AIR CLEANER REMOVAL in Service Manual. 3. Remove existing exhaust system. Discard mufflers but save remaining parts for kit installation. Refer to EXHAUST SYSTEM REMOVAL in Service Manual. 4. Remove engine from chassis following the instructions in the Service Manual. 5. Remove induction module. Refer to appropriate FUEL INJECTION section in Service Manual. 6. See Figure 1. Remove and save screw (with pilot sleeve) to release fuel supply tube clamp. is03165 Figure 1. Fuel Supply Tube Clamp Screw 7. See Figure 2. Pull fuel supply tube (1) from fuel rail. -J03825 1 of 10 1 2 3 3 4 is03166 1. Fuel supply tube 2. Sealing washer 3. O-ring 4. Screw (with pilot sleeve) Figure 2. Fuel Supply Tube Assembly 8. Remove sealing washer (2) and O-ring (3) from fuel supply tube. Remove second O-ring (3) from fuel rail bore. Discard sealing washer and O-rings. 9. See Figure 3. Pull fuel injectors (1) with attached fuel rail from induction module. To overcome the resistance of the bottom O-ring (2) on both fuel injectors, gently rock assembly back and forth while pulling. 10. Remove spring clips (3) from fuel injectors. Pull fuel injectors from fuel rail. To overcome the resistance of the top O-ring (4) on both fuel injectors, gently rock assembly back and forth while pulling. 11. Disassemble engine top end, engine bottom end, crankcase, and crankshaft. Refer to appropriate ENGINE sections in Service Manual. 1 2 4 3 is03167 1. Fuel injector 2. O-ring, bottom 3. Clip, spring 4. O-ring, top Figure 3. Fuel Injector Assembly INSTALLATION Inspect Cam Clearance A clearance problem between the new cam lobe and crankcase housing may exist on certain older model engines. Failure to maintain proper clearance could result in severe engine damage. (00391b) 1. See Figure 4. Prior to starting assembly procedures, insert new cams from kit into inner needle bearings (1) located in the right side crankcase and check for a minimum of 0.030 in. clearance between highest lift point of cam lobes and crankcase housing (2) with feeler gauges. NOTE If inadequate clearance is detected, crankcase housing must be machined to provide 1.060 in. Radius clearance from center of each cam bearing bore. After machining, recheck for minimum of 0.030 in. clearance

Harley-Davidson Big Twin Evolution and Twin Cam Edelbrock/ JE Sport INSTALLATION INSTRUCTIONSsman Pistons

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Filed Under (Harley Davidson) by admin on 07-02-2011

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INSTALLATION PROCEDURE Note: All Evolution® “Big Twin” pistons are marked “Front” or “Rear” and come with rings, wrist pins, and locks. • Note: We highly recommend that a dealer or trained mechanic perform the installation of these pistons. Specialized equipment is required for honing and finishing the cylinders to ensure long life of the piston and cylinder assembly. 1. Remove original equipment cylinders from engine. Refer to a shop manual or other reference book for specific steps, if needed. (Note: Care should be taken not to bend the studs or damage the cylinder during removal of the cylinders.) 2. With a small screwdriver, move the wrist pin retainer around to gain access to the tail of the retainer as it lines up with the notch in the bottom of the wrist pin hole. 3. Use a small screwdriver, pick or awl to roll the wrist pin retainer out of its groove. 4. Push wrist pin out and remove piston. 5. Repeat procedure for the other piston. 6. At this point, take cylinders, new pistons, and piston-to-wall clearance specifications to your dealer or machine shop to perform necessary machining operations. • IMPORTANT NOTE (Evolution® and Twin Cam®): The cylinder bore must be machined/honed to provide .0025″ of piston-to-wall clearance. Measure the piston diameter at a point .500″ up from the lower skirt (See Figure 3). 7. Starting with the front cylinder, install new piston rings and one wrist pin retaining clip (Note: Second ring has a dot which must face up when the ring is installed) . 8. Place the piston over the conecting rod, making sure that the intake valve pocket is towards the intake side. (For Evolution ® , see Figure 1. For Twin Cam ® , see Figure 2) . Coat the wrist pin with engine oil and insert it into the piston. Install the second wrist pin retainer into the groove. 9. Lightly coat the piston skirt with engine oil. Place a piston ring compressor over the piston/ring assembly and compress. Place the cylinder over the piston and gently push down until all rings are in the cylinder. Remove the ring compressor, and push the cylinder the rest of the way down. (Note: Be careful not to get oil onto the base gasket.) 10. Place two nuts and washers on opposite corners of the #1 cylinder to hold it down while you repeat the procedure for cylinder #2. 11. Assemble the rest of the engine per factory specifications. Start the engine and let it run at 2000 rpm for about 10 minutes.

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HARLEY DAVIDSON HYBRID CAM PLATE AND HIGH FLOW OIL PUMP KIT REMOVAL AND INSTALLATION INSTRUCTIONS

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Filed Under (Harley Davidson) by admin on 07-02-2011

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REMOVAL To prevent accidental vehicle start-up, which could cause death or serious injury, disconnect battery cables (negative (-) cable first) before proceeding. (00307a) Disconnect negative (-) battery cable first. If positive (+) cable should contact ground with negative (-) cable connected, the resulting sparks can cause a battery explosion, which could result in death or serious injury. (00049a) 1. Refer to the service manual and follow the instructions to remove the seat and disconnect the battery cables, negative (-) cable first. Retain all seat mounting hardware. Gasoline can drain from the carburetor fuel line when disconnected from fuel valve fitting. Gasoline is extremely flammable and highly explosive, which could result in death or serious injury. Wipe up spilled fuel immediately and dispose of rags in a suitable manner. (00256a) NOTES Installing this kit requires removal and installation of the cam support plate. Refer to the service manual for instructions with the following exception pertaining to cam compartment compo- nents: The crank and primary cam sprocket flange bolts are specially hardened, and the flat washers are of a special diameter and have ground surfaces. Use ONLY the parts provided in the Drive Gear Retention Kit (H-D Part Number 25533-99A, sold separately) when installing this kit. -J04804 1 of 7
The cr ank sprocket flange bolts and pr imary cam sproc ket flange bolts ARE NOT interchangeable. 2. Refer to the service manual to remove and discard the crank sprocket flange bolts and primary cam sprocket flange bolts and washers. 3. For 1999 models only: Refer to the service manual to remove and discard the currently installed cam drive sprocket. 4. Refer to the service manual to remove and disassemble the cams from the support plate and oil pump. Discard the support plate and oil pump. 5. For 1999 – 2000 Dyna, 2000 Softail, 1999 – 2000 Touring, and 2001 EFI Touring models only: Inspect the cams, chain, sprockets and chain tensioners for wear, and replace as needed. Refer to the service manual for inspection and replacement procedures. For 2001 – 2005 Dyna, 2001 – 2006 Softail, 2002 – 2006 Touring, and 2001 carbureted Touring models only: Inspect the cams and secondary cam chain for wear, and replace as needed. Refer to the service manual for inspection and replacement procedures. The primary cam chain, primary sprockets and both tensioners will be replaced by new components from the kit. For ALL models and years: Discard the guide, as it will not be used. INSTALLATION 1. ALL models: See Figure 1. Obtain the new Rear Cam Roller Bearing Kit (H-D Part Number 8983) from inside the Cam Service Kit (H-D Part Number 17045-99C, purchased separately), and install as indicated in Step 2. NOTE See Figure 2. If not enough of the splined shaft is exposed to install the sprocket, omit the spacer (4) and proceed to Step 2e. When the bearing inner race is started onto the machined area, remove the flange bolt (5), flat washer (6) and sprocket, then assemble using the spacer (4). Repeat Step 2e to fully install bearing inner race. To center thrust washer, be sure o-ring is installed in relief groove. Damage to bearing cage and engine can occur if thrust washer is not centered. (00473b) 2. See Figure 1. Install the O-ring (5), thrust washer (4) and bearing inner race (3) onto the rear camshaft as follows: a. See Figure 2. To properly locate the thrust washer (2), install the O-ring (3) in the grinding relief groove on the splined end of the rear camshaft between the machined area and the secondary cam sprocket.

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Harley-Davidson Twin Cam Engines Performer RPM Gear Drive Camshaft Kit INSTALLATION PROCEDURE

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Filed Under (Harley Davidson) by admin on 03-03-2012

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1. Disconnect the battery, and remove the fuel tank. 2. On engines with the oil tank above the engine, drain the engine oil. 3. Remove the front exhaust pipe to clear the Cam Housing Cover. 4. Remove the Rocker Covers and remove the four 5/16″ bolts and the two 1/4″ bolts holding the rocker arms in place. With the rocker arms removed, remove the stock pushrods. 5. Remove the push rod tube retaining clips and push rod tubes. 6. At this point, you may remove the lifter covers and take the lifters out, or you can make a lifter holding tool from a binder clip as shown in Figure 1 INSTALLATION PROCEDURE 1. Disconnect the battery, and remove the fuel tank. 2. On engines with the oil tank above the engine, drain the engine oil. 3. Remove the front exhaust pipe to clear the Cam Housing Cover. 4. Remove the Rocker Covers and remove the four 5/16″ bolts and the two 1/4″ bolts holding the rocker arms in place. With the rocker arms removed, remove the stock pushrods. 5. Remove the push rod tube retaining clips and push rod tubes. 6. At this point, you may remove the lifter covers and take the lifters out, or you can make a lifter holding tool from a binder clip as shown in Figure 1 . 7. On pre-2000 models with a cam position sensor, you may want to remove the inspection cover, unplug the wires, and remove the sensor at this time to ease installation later on. 8. Remove the cam housing cover keeping the bolts in a separate cup. ( Note: Oil will run out of the cam housing.) 9. Using the Chain Tensioner Unloader Tool, unload pressure on the outside chain tensioner, and pin it in place with the retaining pin (See Figure 2) .

HARLEY DAVIDSON NOSTALGIC TWIN CAM 88 AIR CLEANER COVER INSTALLATION MANUAL

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Filed Under (Harley Davidson) by admin on 23-02-2011

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INSTALLATION 1. Remove current air cleaner cover and screw. 2. See Figure 1. Coat threads of screw (1) from kit with Loc- tite® 243 (blue) (Harley-Davidson part number 99642-97). Install new air cleaner cover (2) with screw (1). If this kit will be installed with a Screamin’ Eagle Twin Cam 88 high flow air cleaner kit, place the self adhering gasket (must be purchased separately) inside the cover between the air filter and the cover. Tighten screw to 36-60 in-lbs (4.1- 6.8 Nm)

HARLEY DAVIDSON SCREAMIN' EAGLE TWIN CAM 110 (1800 CC) CONVERSION KIT INSTALLATION MANUAL

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Filed Under (Harley Davidson) by admin on 19-02-2011

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REMOVAL Prepare for Service 1. Position motorcycle on a suitable lift. NOTE If vehicle is equipped with Harley-Davidson Smart Security System, see owner’s manual for instructions to disarm the system. To prevent accidental vehicle start-up, which could cause death or serious injury, disconnect negative (-) battery cable before proceeding. (00048a) 2. Disconnect battery cables, negative (-) battery cable first. 3. Remove seat according to the instructions in the service manual. 4. Refer to service manual to remove left saddlebag and side cover. When servicing the fuel system, do not smoke or allow open flame or sparks in the vicinity. Gasoline is extremely flammable and highly explosive, which could result in death or serious injury. (00330a) 5. Remove fuel tank according to the instructions in the service manual. Remove Engine Components 1. Remove existing air cleaner assembly. Discard backplate but save remaining parts. Refer to AIR CLEANER REMOVAL in service manual. 2. Remove existing exhaust system. Refer to EXHAUST SYSTEM REMOVAL in service manual. 3. Remove engine from chassis following the instructions in the service manual. 4. Disassemble engine top end and bottom end. Refer to appropriate ENGINE sections in service manual. 5. Remove existing clutch diaphragm spring. Refer to CLUTCH REMOVAL in service manual. The procedures in this instruction sheet should be performed by one experienced in precision measuring techniques. Failure to meet tolerances called for in this instruction sheet can result in engine damage. (00511b) -J04793 1 2 is03517 1. O-ring counterbore 2. Spigot bore Figure 1. Spigot Bore and O-Ring Counterbore Dimensions Table 1. Spigot Bore and O-Ring Counterbore Dimensions Depth Bore Description 1.625 +/- 0.010 in. (41.3 +/- 0.25 mm) 4.205 +/- 0.010 in. (107 +/- 0.25 mm) Spigot Bore 0.085 +/- 0.003 in. (2.16 +/- 0.08 mm) 4.415 +/- 0.002 in. (112 +/- 0.05 mm) O-Ring Counter- bore is03456 Figure 2. Cylinder Wall MACHINE CRANKCASE Crankcase Boring Preparation NOTE During final assembly of the engine, Harley-Davidson recommends replacing the OE cylinder studs with Screamin’ Eagle High Tensile Studs (16505-01). 1. Remove cylinder studs from the engine crankcase. 2. Mask off all bearings and oil holes to prevent debris and contaminants from entering those areas. 3. Inspect and clean engine case mating surfaces. 4. See Figure 6. Reassemble engine case with OE screws, except the top center screw between the cylinders, and tighten to specifications listed in service manual. NOTE To prevent damage to crankcase boring tool, it is important to replace the top center screw with a modified top center screw (1093). This screw is included in the Crankcase Boring Tool Kit (94419-06) and can be purchased separately from a Harley- Davidson dealer. 5. Install modified top center screw (1093) between the cylinders and tighten to 50-90 in-lbs (5.6-10.2 Nm). 6. See Figure 1 and Table 1. Machine crankcase cylinder spigot bore and O-ring counterbore to the dimensions shown. Modify Crankcase

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Harley-Davidson Camshaft TC, EVO, Shovelhead, XL EVO, Iron Head, XR Specifications

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Filed Under (Harley Davidson) by admin on 02-11-2010

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EVO Black Widow PP8833-2 – 29 55 62 25 264 267 54 103 109 105.8 0.600 0.602 EVO Black Widow PP8826-2 – 27 61 63 29 268 272 56 107 107 107.0 0.602 0.602 EVO Black Widow PP8817-2 – 254 254 0.590 0.590 EVO Carl’s Speed Shop CM4 – 28 44 52 20 252 252 48 98 106 102.0 0.495 0.495 EVO Carl’s Speed Shop CM495F Y 19 47 50 16 246 246 35 104 107 105.5 0.495 0.495 0.179 0.168 EVO Carl’s Speed Shop CM580 – 19 47 50 16 246 246 35 104 107 105.5 0.580 0.580 0.194 0.163 EVO Carl’s Speed Shop CM612 – 36 60 68 28 276 276 64 102 110 106.0 0.612 0.612 0.277 0.235 88 EVO Carl’s Speed Shop CM660 – 38 62 68 28 280 276 66 102 110 106.0 0.660 0.660 0.314 0.277 90 EVO Carl’s Speed Shop CM774 – 284 284 0.784 0.784 0.277 0.236 EVO Carl’s Speed Shop CM780F – 34 70 74 30 284 284 64 108 112 110.0 0.774 0.774 103 EVO Crane EVR0020 – 31 64.5 77 23 275 280 54 107 117 112.0 0.608 0.589 88 EVO Crane Fireball 2000 Y -12 22 20 -10 190 190 -22 107 105 106.0 0.490 0.490 0.026 0.032 EVO Crane Fireball 300 Y 12 34 41 15 226 236 27 101 103 102.0 0.490 0.490 4000 EVO Crane Fireball 310 Y 16 40 43 19 236 242 35 102 102 102.0 0.490 0.490 1500 4500 75 EVO Crane Fireball 316 Y 19 43 48 24 242 252 43 102 102 102.0 0.490 0.490 2000 5000 80 EVO Crane Fireball 326 – 24 48 57 25 252 262 49 102 106 104.0 0.490 0.500 2500 5500 EVO Crane H286 Y 19 43 48 24 242 252 43 102 102 102.0 0.490 0.490 2000 5000 80 EVO Crane H290 – 17 43 45 23 240 248 40 103 101 102.0 0.581 0.581 1800 5200 EVO Crane H296 – 24 48 57 25 252 262 49 102 106 104.0 0.490 0.500 2500 5500 EVO Crane H304 – 24 50 55 25 254 260 49 103 105 104.0 0.600 0.600 2500 5800 EVO Crane H306 – 28 54 69 23 262 272 51 103 113 108.0 0.500 0.510 0.224 0.195 3000 6000 EVO Crane H310 – 23 63 68 28 266 276 51 110 110 110.0 0.550 0.550 0.229 0.229 3000 6500 88 EVO Crane H314 – 26 54 65 21 260 266 47 104 112 108.0 0.600 0.600 2800 6000 EVO Crane HEV0042 – 27 59 71 23 266 274 50 106 114 110.0 0.600 0.576 0.226 0.194 3000 6000 100 116 EVO Crane HEV0067 – 24 50 56 24 254 260 48 103 106 104.5 0.600 0.530 0.128 0.113 EVO Crane HEV0098 – 36 62 72 34 278 286 70 103 109 106.0 0.650 0.650 0.171 0.156 96 EVO CycleRama CR-E550 – 24 52 53 23 256 256 47 104 105 104.5 0.550 0.530 EVO CycleRama CR-E581 – 22 46 53 23 248 256 45 102 105 103.5 0.581 0.550 EVO CycleRama CR-E600A – 24 50 56 24 254 260 48 103 106 104.5 0.600 0.530 EVO CycleRama CR-E600B – 23 51 54 22 254 256 45 104 106 105.0 0.600 0.550 EVO CycleRama CR-E617 – 22 50 50 22 252 252 44 104 104 104.0 0.617 0.617 EVO CycleRama CR-E630 – 18 60 63 13 258 256 31 111 115 113.0 0.630 0.630 EVO CycleRama CR-E660 – 27 59 71 23 266 274 50 106 114 110.0 0.660 0.660 3500 6500 140 EVO Dave Mackie DM500 Y 22 38 52 12 240 244 34 98 110 104.0 0.500 0.500 0.189 0.138 EVO Dave Mackie DM500X Y 25 40 55 20 245 255 45 98 108 102.5 0.500 0.500 0.208 0.178 EVO Dave Mackie DM530 – 28 42 55 15 250 250 43 97 110 103.5 0.530 0.530 0.221 0.141 EVO Dave Mackie DM580 – 26 42 56 12 248 248 38 98 112 105.0 0.580 0.580 0.227 0.144 113 EVO Dave Mackie DM581 – 26 42 56 12 248 248 38 98 112 105.0 0.580 0.580 0.227 0.144 EVO Dave Mackie DM595 – 21 49 57 14 250 251 35 104 112 107.8 0.595 0.595 0.192 0.150 EVO Dave Mackie DM635 – 20 56 59 18 256 257 38 108 111 109.3 0.635 0.635 0.194 0.176 EVO Edlebrock 1740 Y 19 43 48 24 242 252 43 102 102 102.0 0.490 0.490 0.176 0.203 EVO Edlebrock 1741 – 20 46 52 22 246 254 42 103 105 104.0 0.600 0.600 0.183 0.187 EVO Head Quarters HQ-23 – 19 47 52 24 246 256 43 104 104 104.0 0.600 0.530 EVO Head Quarters HQ-24 Y 20 36 52 19 236 251 39 98 107 102.3 0.500 0.500 EVO Head Quarters HQ-25 – 18 38 42 14 236 236 32 100 104 102.0 0.550 0.550 EVO Head Quarters HQ-26 – 20 54 53 22 254 255 42 107 106 106.3 0.600 0.530 89 EVO Head Quarters HQ-27 – 26 60 70 24 266 274 50 107 113 110.0 0.650 0.575

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1999-2001 Harley-Davidson Twin Cam 88 FI Controller Installation MANUAL

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Filed Under (Harley Davidson) by admin on 25-03-2012

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Remove the seat. Remove or raise the fuel tank. The tank needs to be raised enough to give access to the fuel injectors and TPS wires. Unplug the front injector. On the FI Controller, there are 2 pairs of injector connectors. Plug the pair with the orange wires into the front cylinder injector harness and front cylinder injector. Repeat this using the other connector pair and the rear cylinder injector. Locate the TPS connector behind the throttle body. STEP 1 STEP3 STEP2 Installation Part# DFCH-2 2 Rear Cylinder Injector Front Cylinder Injector TPS Connector STEP 3 STEP 2 STEP1 Unplug the connector from the TPS. Crimp the wire tap onto the wire that is grey with a purple stripe. This wire should be in position “C” on the connector. Plug the grey wire from the FI Controller into the wire tap. Run the wiring harness for the FI Controller from the engine to the seat. Make sure that it will not get damaged when you reinstall the tank. Use one of the wire ties to tie the wires to the frame, away from the cylinder head. Place the FI Controller where you plan on mounting it permanently. In most cases, this will be under the seat. Connect the ground lug (black wire) to a grounding point on the bike. Use the Velcro tape to mount the FI Controller in position. Use alcohol swab to clean mounting surface prior to attaching Velcro. Reinstall fuel tank and seat. STEP 4 STEP 6 STEP 5 STEP4 STEP6 STEP5 Installation Part# DFCH-2 3 FI Controller
For Tech Support: 800.928.3962 Controls The FI Controller is preprogrammed with 4 base fuel curves. The curves are selected using the switch labeled BASE. These curves adjust fuel delivery based on throttle position and RPM, providing the right amount of fuel under all conditions. The 4 fuel curves correspond to varying levels of performance modifications. The levels of modification are broken down into the following groups. Base Curve 1 – Stock or basic modifications. This includes slip on exhausts, intakes, air boxes, and air filters. It will also work for headers or full exhaust systems. Base Curve 2 – Motor upgrades. This includes cams, 95 ci motors. Base Curve 3 – More extensive motor upgrades. This includes 103 ci motors, cams, ported heads

Yamaha YZ 250F Camshafts REMOVAL AND INSTALLATION MANUAL

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Filed Under (Yamaha) by admin on 30-12-2011

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Remove the 4 bolts that hold the exhaust cam cap in place, lift the cam cap off. It may be necessary to pry very lightly on the cap to lift it off its dowel pins. Do not use the cam lobes as the pry point. Be careful not to drop the dowels and also be careful to not lose the half moon shaped retainer for the bearing under the cam cap. Remove the 6 bolts that hold the intake camshaft cap and lift the cam cap off the camshaft, again, be careful to not drop the retainer or dowels. Lift the intake camshaft out of its pocket in the cylinder head casting. Remove the cam chain from the sprocket, set the stock camshaft aside. Lift the exhaust cam out of its pocket in the cylinder head casting and remove the chain from the sprocket. Do not drop the cam chain, dangle it over the side of the engine while keeping slight upward pressure on the chain to maintain its position on the drive sprocket on the crankshaft. Fit the half moon shaped retainers in the grooves of the Hot Cams camshaft bearings to ensure good fit, set retainers aside for the time. Using assembly lube, lube the shim buckets, bearing surfaces for the camshafts in the cylinder head, and pack some in the camshaft bearings. Set the exhaust cam into the cylinder head casting while at the same time fitting the cam chain over the sprocket. Make sure that you keep all the cam chain slack to the back of the engine. The cam chain pulls the camshaft sprockets in a counter clockwise direction and the slack of the chain must be kept on the cam chain tensioner side of the engine. The exhaust cam has two timing marks on it. When correctly installed one mark will be at the 9 o’clock position and the other mark will be at the 12 o’clock position. When correctly timed the mark at 9 o’clock will be aligned with the valve cover gasket surface. Repeat the above process for the intake camshaft. Again, make sure you keep the chain slack to the cam chain tensioner side of the engine. Check to be sure the crankshaft is still at TDC. The intake cam has two timing marks also. One at 12 o’clock and the other at 3 o’clock. When both cams are installed correctly, the valve cover gasket surface will form a straight line through the exhaust timing mark at 9 o’clock and the intake timing mark at 3 o’clock

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