Filed Under (Harley Davidson) by admin on 15-04-2012
1) Assemble & install the chain tensioner assembly over the primary chain as shown in figure 1. 2) Install the compensator sprocket with extender & spacer (numbers 5, 6, & 7, FIG 2)(#7 is not included in this kit), primary chain, chain tensioner, and clutch basket simultaneously onto the motor drive shaft & transmission main shaft. Rotate the chain drive slightly as needed to allow the splines to line-up. 3) Install the chain tensioner nut loosely on the chain tensioner bolt. 4) Install the sliding cam onto the compensator sprocket, & slide the compensating sprocket cover-assembly (#3) over the cam. 5) Apply 2 drops of Rivera “Red” thread-lock on the threads of the motor drive shaft, & install the motor nut loosely with the fingers at this time. The hex spacer (#7) and spacer (#2) as seen in fig.2 are not provided in Rivera Engineering’s chain drive kit. These components are required with some applications, and can be purchased from your local Harley-Davidson dealer. FIG 2 6) Apply 2 drops of Rivera “red” thread-lock on the threads of the transmission main-shaft and loosely install the clutch hub nut (left hand threads). 7) Place the HD “Primary Drive Locking Tool” HD-41214 on the primary chain as shown in figure XXX and tighten the motor sprocket nut to 150-165 foot-pounds. 8)Turn the locking tool 180 degrees and move it to the clutch sprocket. Tighten the clutch hub nut to 70-80 foot pounds (left- hand thread). Adjust chain tension so that the top strand has 5/8″- to-7/8″ of up and down play (cold drive train). Tighten the center bolt nut to 21-29 foot pounds of torque.
Filed Under (Tips and Review) by admin on 27-11-2010
Cleaning and Relubrication Perhaps the largest contributor to shortened chain life is inadequate lubrica- tion. All working parts of a chain should be lubricated uniformly. The use of the highest viscosity oil that allows for flow between the link plates and coats pin-bushing areas will normally provide the greatest wear resistance. Apply oil to the upper edges of link plates. This allows for the greatest access of oil to pin-bushing joints. For open drives, excess lubrication on outer chain surfaces should be removed, since it will either be thrown off during operation or serve to collect foreign materials. If foreign objects or surplus lubrication accumulates on chain surfaces to the extent of making re-lubrication of the joints impossible, the chain must be cleaned. Standard roller chains may be cleaned by washing in kerosene or any other good petroleum-based solvent. WARNING: These solvents are flammable. Agitate the chain to assure penetration of the solvent and a thorough flushing of the pin-bushing areas. Drain off excess solvent and inspect bushings and pins for wear. Replace the chain if wear is excessive or parts are fractured or missing. O-ring chains may be cleaned externallyby washing in kerosene. Do not use any other cleaning agent or the O-rings may be damaged. When cleaning O- ring chain, clean only the external areas of the chain. Do not attempt to force kerosene into the pin-bush cavity. Do not try to repair a worn-out chain by replacing individual links. The pitch of the new links will be shorter and will most likely result in chain fatigue failure and/or severe sprocket damage. For chains which are still usable, soak them in SAE 40 or 50 automotive engine oil (without additives). Flexing the chain in oil will assure greater penetration of lubricant. Inspect and clean sprockets. If sprockets are worn or damaged, they should be replaced.Installing new chain on worn out sprockets will significantly shorten the chain’s service life. WARNING: always wear eye protection when assembling or disassembling chain
Filed Under (Kawasaki) by admin on 25-10-2010
Remove the plug bolt from the back of the cam chain tensioner assembly. It is under pressure from the spring. Remove the spring and pin. Remove the bolts and tensioner assembly from the cylinder. Release the lock on the tensioner assembly and push the tensioner rod into the assembly so that it is fully retracted. Remove the eight 5mm Allen headed bolts that hold the cam caps in place. Remove the cam caps; be aware of the locating dowels in the caps to keep them from falling into the engine. It may be necessary to pry very lightly on the caps to lift them off their dowel pins. Do not use the cam lobe as the pry point. 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. Using assembly lube, lube the shim buckets and bearing surfaces for the camshafts in the cylinder head. Set the exhaust camshaft 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. 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. Check the location of the cam lobes. The camshafts are marked, and preset to 108-degree centers. If the lobes are not where they should be, adjust the positioning of the camshaft by rotating the sprocket one tooth on the chain. Do this until it is in the correct position as before you removed the camshafts. Check the positioning of the crankshaft for the TDC mark
Filed Under (Polini) by admin on 02-12-2010
Air cleaner – Clean and reoil daily or after each moto to prevent motor failure and reduced performance. Transmission oil – change after every race, or at end of riding day. Chain – check tension and lubricate before every ride, adjust or replace as needed. Reoil after riding in damp conditions. Clutch – disassemble and clean clutch assembly frequently, every 2-3 races at least. Inspect kickstarter gears at this time. Ignition cover – remove cover and wipe dry after each ride or after washing bike to remove condensation. Piston rings – replace as often as every 3-5 races with expert rider, less often with less aggressive riders. Piston, pin, rod bearing & circlips – replace as often as every 8-10 races with expert rider, less often with less aggressive riders. Coolant – change yearly, make sure there is at least a 50/50 mixture of antifreeze if freezing temperatures are possible. Steering bearings – Check daily for looseness or play. Adjust and regrease as needed. Swingarm – Check often for looseness. Regrease several times a year. Replace bushings if any play is evident. Sprockets – check for worn or curved teeth each time chain is adjusted. Chain roller& wear pads – check roller for free rotation when checking chain. Make sure roller is not bent or damaged. Check chain wear strips on swingarm and chain guide frequently. Replace as needed to prevent chain from damaging motorcycle. Spokes – Check after each race or after each day of riding for looseness or damage. Wheels & tires – check wheels after each race for dents, cracks or other damage. Check tires for cuts, damage or wear. Check tire pressure daily and adjust for riding conditions. Shock – Check shaft area daily for signs of oil leakage or damage. Check swingarm and shock bushings for looseness. Forks – Check forks daily for leaking oil or damage to tubes. Make sure forks are not twisted check for smooth operation. Spark plug – check sparkplug color and condition after each race or end of riding day. Adjust jetting to keep plug from fouling or overheating. Silencer – If bike seems to be getting louder, replace packing and decarbonize inner tube. Expansion pipe – check daily for large dents, damage or leakage. Remove carbon from headpipe when pipe is removed. Have large dents fixed, or any dents within 8″ of the cylinder. Replace o-rings on pipe as needed to maintain a good seal. Footpegs – check daily for proper operation, pegs should spring back into place. Make sure pegs are not bent or overly dull. Handlebars – check bars after any crash for bending. Look for cracks near bar clamps. Replace bars that have been straightened more than 2 or three times, or if bar is badly bent. Aweakened bar can snap suddenly causing injury to rider. Throttle – check throttle for proper operation each time before bike is started. Remove and clean inside of grip and bar as needed. Grips – check grips daily for wear or looseness. Replace as needed. Use grip glue & safety wire to help hold grips in position. Calipers & pads – check pad wear and caliper function daily or after each race. Replace pads and clean calipers as needed. Brake lever – check lever daily for damage or wear. Make sure lever is at proper angle for both seated and standing positions. Leave lever clamp loose enough to allow clamp to rotate during crash rather than breaking lever. Check and adjust freeplay as needed. Brake pedal – Check pedal daily for damage and proper freeplay. Adjust rear caliper as needed. Reeds – Remove and inspect reed block during every ring change. Check reeds for signs of wear, fraying and cracking. Make sure reeds sit flat and seal well. Replace at any sign of wear or damage or at least once a year, more often for expert riders. Nuts & bolts – Check all nuts and bolts regularly. Make sure to check engine mounting bolts and swingarm bolt frequently
Filed Under (Tips and Review) by admin on 11-11-2010
1. Make sure the ignition timing is correct 2. Adjust the valves as necessary to ensure proper operation 3. Run the engine to warm it up a bit 4. Adjust the float setting. To do this, remove the carburetors (leave the throttle cables attached), remove the bowl and turn the carburetor upside down (fuel will spill). The float should look like this: Adjust as necessary by bending the float support (#37 in Figure 1). Reinstall Installation and idle adjustment 1. First you must adjust the idle. It is acceptable per the manual to adjust the idle by using the idle adjust screws (11). This usually involves screwing them then backing out 1 to 1.5 turns. Or you can adjust looking at the sliders 2. If installing the carburetors: a. Remove the cover (2) b. Reomve the slider (3) c. Place the throttle cable through the guide (18) with the spring (4) on the cable. d. Route the cable through the slide catch (6) e. Insert the slide assembly into the chamber and make sure it easily slides up and down. Direct the needle (8) into the opening of the diffuser (angled side visible). f. Screw assembly together and verify via throttle movement that slide moves freely. Attach fuel delivery lines to (12). 3. Using the idle set screw (11) raise the slider so the lower edge is 1-2 mm. 4. Assemble to engine using the proper gaskets (paper – felt – paper). 5. Using the locknut (26) adjust the free play of the throttle cable (2-3 mm) 6. Adjust the idle mixture screw – turn in completely then out 1 to 1.5 turns. * Starting using the K68′s (cold weather) 1. Verify fuel flow. Apply choke (pull 52 in Fig1). 2. Using the ticklers (13) allow fuel to enter the bowl until fuel drains from (14) 3. With the ignition off, kick 1 or 2 times 4. Turn ignition on, and as soon as engine is warmed up (maybe sooner) push choke mechanisms to open choke Idle Adjustment (engine running and warm) 1. Remove one of the spark plug caps, and with the cap shorted, adjust (11) to decrease RPM’s to a point of being minimally steady. 2. Adjust the mixture (15) out until RPM’s decrease. Turn in until RPM’s increase slightly. Then turn in screws ¼ to 1/3 revoultion. 3. Do the same for the second carburetor with the first spark plug cap shorted. 4. With both cylinders, adjust each idle (11) on each carburetor the same amount each until it’s at a steady, minimal RPM. Use small changes. (at this point you can use your airflow tool to check). 5. Sharply increase, then decrease throttle. Then engine must return to low RPMs smoothly. If the engine goes below limits, readjust (11) from step 4. Synchronization of the K68 Note: Rather than using the opposite cylinder shorted to test the pull of the live cylinder carburetor, you can use something like a Twinmax connected to the test ports (27 Fig 1). Or, if you have a model without these ports, use a Synchrometer (Appendix 2) held against the face of the carburetor. These tools merely show airflow passing through each carburetor (which is dependent on the position and wear on the slide). If using these tools, it’s not necessary to do the following steps. You wil want to use a throttle guide (Appendix 1), to show airflow at various throttle settings. Using the flow meter of your choice make sure each carburetor is the same at the various throttle settings. 1. Place the motorcycle on the center stand ensuring the rear wheel is suspended 2. Make sure you have large area to work with (safety issues here) 3. Shift into the highest gear with the engine running 4. Short one spark plug cap to the cylinder (using a nail or something in the fins) 5. Increase the speed to 40-50 km/hr 6. Fix the throttle using the throttle (maybe using a throttle stop screw under the throttle housing). 7. Reconnect other cylinder and using the opposite carburetor determine the speed which should be the same as the first. 8. Adjust the position of this slide to achieve the referenced speed using the locknut at the top of the carburetor.