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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

Yamaha YZ400/426F Camshafts REMOVAL AND INSTALLATION MANUAL

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Filed Under (Yamaha) by admin on 01-01-2012

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Cleanliness is always a good place to start. Make sure the motorcycle is cleaned thoroughly before you start. It would be advisable to use an engine degreaser on the frame and the engine. This will ensure a clean engine during the assembly process and less of a chance of thread damage and/or dirt contamination in the engine during reassembly. And as always, replace any fiber-based gasket that was moved in any way, i.e.: cam chain tensioner. You will need basic hand tools and a torque wrench, machine towels (rags), some cleaning solvent, and a cam chain tensioner gasket. And the Hot Cams’ Degree Wheel Kit if you so desire. We will start by removing the tank and seat, top engine mount, and the cam cover. Remove the crankshaft cap and timing hole cap on the left engine case cover. Remove the spark plug. Rotate the engine in a counter clockwise (CCW) direction. Position the engine on top dead center (TDC) using the mark on the flywheel or better yet a degree wheel using a positive stop. Be sure to notice that the intake valves were the last to move, this will ensure the engine of being on “true” TDC. True top dead center occurs when both the intake and exhaust valve are closed when the piston is at TDC. This is technically the end of the compression stroke and the Page 1
beginning of the power stroke. The “artificial” TDC is during the overlap when both the intake and exhaust valves would be open. Note the positioning of the cam lobes (their included angle will be close to 170 degrees), this will help during the installation of your new Hot Cams camshafts Remove the cap bolt on the end of the cam chain tensioner block, be aware of the copper washer. Release the spring tension on the cam chain tensioner by turning the flat blade screw slot inside the adjuster block in a clockwise (CW) direction; it will lock in the retracted position. Remove the two 8mm headed bolts that hold the cam chain tensioner to the cylinder block. Remove and discard the gasket. 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 secure the intake cam 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 camshaft 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

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.

2003 Ducati ST4s Timing Belt Adjustment

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Filed Under (Aprilia) by admin on 31-10-2010

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This instruction on cam belt adjustment starts after you remove the fairing pieces. Plan on an hour to remove these. Since you are performing your own service, buying Ducati belts may not be that expensive. There may be another belt source, but I have not confirmed this for the 996 engine of the 02-03 ST4s. Fig 1 – ST4s ready for belt adj./ repl. Fig 2 – Crank tool installed. See dwg. 1) Ensure maximum of ½ tank of gas. Fuel will leak into the charcoal canister, then onto the floor if the tank is over half full and the tank is tilted up on its hinge. So put the tank up on its hinge. 2) Remove spark plugs. Cover sparkplug wells with boots or rags. This is a great time to toss out those Champions for a set of NGK DCPR8E’s. 3) Remove the front shield from the horizontal cylinder head. 4) Remove crankshaft cover on Riders LH side and insert crank tool. A crank tool can be made by following the drawing at the end of this document. See Fig 2 above. The flat head screws used are kind of soft so beware on their removal. 5) Remove oil pressure sending unit cable and remove oil sending unit. No oil should pour out. 6) Remove battery and remove bolts fastening battery box to engine/frame. You can let the battery box dangle or partially support it via a bungee cord. Be careful of the cable on the ground of the ECU. By dangling the battery box excess stress could be placed on this cables connector and you don’t want to troubleshoot an intermittent electrical issue. 7) Remove cam belt covers. The two covers over the cams are real easy. The center piece is removed by pulling it down. You may have to move some hoses and cables out Timing belt adj. doc 1
of the way because it is a tight fit. Removing the oil pressure sending unit gave clearance for the removal. Fig 1 shows bike ready to be worked on. On the Rider’s LH is a window on the case cover. Using a flashlight to illuminate the area, marks can be rotated into view using the engine turning tool. There are two marks denoting the TDC of each of the cylinders. When a mark in the window aligns with the pointer, look at the crank driving pulley on the Rider’s RH of the engine. If the driving pulley’s mark is aligned with the pointer on the engine case, you are at TDC horizontal cylinder. If the pulley mark and the pointer on the engine do not align, rotate the engine until the mark in the window on the Rider’s LH side case cover aligns as well as the pulley’s mark and the engine’s pointer. Fig 3 shows the engine pulley and pointer. You can check that the horizontal piston is at TDC by inserting a welding rod into the spark plug well and touch the top of the piston with it to sense its position. Timing marks on cam pulleys are clearly stamped on all four pulleys. When the crank driving pulley aligns with its corresponding pointer on the engine case and the marks on the pulleys align with their corresponding marks on both cylinders, you are in position for belt adjustment and replacement

Daytona 675 Motorcycle Race Kit Installation Manual

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Filed Under (Triumph) by admin on 29-10-2010

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Remove the existing cylinder head gasket in line with the procedures detailed in the Daytona 675 service manual. 2. Fit the chosen race kit cylinder head gasket following the procedures detailed in the Daytona 675 service manual. Caution The use of the following race kit cylinder head gaskets will require changes to the fuelling settings. To alter fuelling settings a third party programmable control unit will be required. Item Description Qty 1 Head gasket (t = 0.65mm) 1 1 Head gasket (t = 0.60mm) 1 1 * Page 7 of 29 © Triumph Designs Ltd 2007. Cams, Valve Spring & Sprocket Kits Parts Supplied Camshaft Inlet Kit – A9618055 Camshaft Exhaust Kit – A9618056 Valve Spring Kit – A9618058 Camshaft Sprocket Kit – A9618057 Warning The race kit must be fitted as a complete set. If it is not fitted as a complete set a failure may result which could cause loss of motorcycle control and an accident. Caution The use of the Camshaft, Valve spring & Sprocket race kits detailed below will require changes to the fuelling settings. To alter fuelling settings a third party programmable control unit will be required. 5 5 4 1 3 2 4 3 Item Description Qty 1 Cam assy, inlet, race 1 Item Description Qty 2 Cam assy, exhaust, race 1 Item Description Qty 3 Valve spring, 14.4id, race12 Item Description Qty 4 Sprocket, camshaft, 34T 2 5 Socket head cap screw, Encapsulated, M6x10 4
Page 8 of 29 © Triumph Designs Ltd 2007. NOTE •The standard inlet cam is 9.25mm max lift and 258.50o duration. The race kit inlet cam is 9.25mm max lift and 268.74o duration. •The standard exhaust cam is 8.5mm max lift and 246o duration. The race kit exhaust cam is 8.5mm max lift and 262.21o duration. •The race kit valve spring must be used in conjunction with the standard spring platforms and retainers. The fitted length of the race springs is the same as the standard spring. 1. The race kit valve springs should be assembled in the same manner as the standard valve springs. Follow the procedure detailed in section 3 of the Daytona 675 service manual. Ensure the springs are installed with the close wound, colour coded end of the springs facing downwards, towards the piston. 2. The race kit camshafts should be assembled in the same manner as the standard camshafts. Follow the procedure detailed in section 3 of the Daytona 675 service manual. 3. The race kit cam sprockets should be mounted and secured to the camshafts using the slotted holes in the sprocket. The slotted holes allow adjustment of the valve timing. The circular holes in the sprockets are for Triumph service tool T3880102 and should not be used to mount the sprockets to the camshafts. NOTE •No timing marks are included on the race sprockets. Race engines will typically have different depths skimmed off the cylinder head and, therefore require specific individual timing. 4. The camshafts should be timed using cam degreeing equipment which typically consists of a degree wheel, pointer, dial indicator and piston stop. Optimum cam timing will depend on the exact specification of the engine, but a recommended starting point is 104o IMOP (Inlet Maximum Opening Point) and 104o EMOP (Exhaust Maximum Opening Point). 5. Always check the inlet and exhaust piston to valve clearance for the timing selected to use, before running the engine. You must ensure both clearances are adequate. As a guide, the standard nominal piston to valve clearance is 1.3mm inlet & 1.5mm exhaust

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