HONDA CB 90O C CYLINDER HEAD PISTON REMOVAL and INSTALLATION

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Filed Under (Honda) by admin on 05-12-2011

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108 CYLINDER/PISTON PISTON/PISTON RING INSPEC- TION I Inspect the piston ring-to-groove clearance. NOTE Mark the rings so that they can be returned to their original locations. Inspect the pistons for damage and cracks; ring grooves for wear. Insert each piston ring into the cylinder, and inspect the end gap

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Lilac LS-18 Motorcycle Maintenance Standards

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Filed Under (Lilac) by admin on 25-11-2010

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CYLINDER AND CYLINDER HEAD MAINTENANCE ITEM STANDARD REPAIR LIMIT METHOD REMARKS Cylinder Bore 54 -0.01 54.1 Boring After boring honing should be performed Ovality 0.01 0.05 Boring After boring honing should be performed Taper 0.01 0.05 Boring After boring honing should be performed Oversize 0.25 steps 55 max. Do R and L cylinders at same time / 4 steps Valve Seat Width 0.8 – 1.0 1.3 Adjust Use a cutter Angle 45∞ Combustion Chamber Volume 18.2cc -0.5cc Remove carbon if heavy accumulation Compression Ratio 7.8:1 Head Gasket Thickness 1.0 Cylinder Head Nut Torque 3.0 kg/m (22 ft.-lb.) Out standard Adjust 8mm nut Intake and Exhaust Ports Port Wall SurfaceMust be smooth Remove carbon Intake and Exh. Valve GuidesOD 12 +0.09 +0.1 ID 7 +0.01 -0.0 7.06 Exchange Intake Valve Stem Diameter 7 -0.02 -0.03 6.9 Exchange Head Thickness 1 0.7 Exchange Exhaust Valve Stem Diameter 7 -0.02 -0.03 6.9 Exchange Head Thickness 1 0.7 Exchange Intake and Exhaust Valve Seat Face Width Range 0.8~1.0 1.3 Use valve seat cutter Intake Valve Guide Clearance 0.02~0.04 0.08 Replace valve or guide Exhaust Valve Guide Clearance 0.06~0.08 0.12 Replace valve or guide Valve Spring (Large) Installed Load 10.2 kg 8.7 kg Replace Fitted length 31.5 Free Length 36.5 34.7 Replace Tilt 1.5/100 3/100 Replace Valve Spring (Small) Installed Load 5.48 kg 4.65 kg Replace Fitted length 29.5 Page 4 of 10 Free Length 33.5 31.8 Replace Tilt 1.5/100 3/100 Replace Rocker Arm ID 12 +0.00 +0.02112.07 Replace Rocker Shaft OD 12 -0.06 -0.024 11.92 Replace Arm and Shaft Clearance 0.045~0.006 0.10 Replace arm or shaft Tappet Clearance 0.05 Out standard Adjust Measure cold at TDC Rocker Arm Ball Surface 1.8îR -0.006 -0.024 Replace if severe wear Pushrod Bend 0.1 0.5 Straighten Over 100mm (2) CRANKSHAFT, PISTON AND CONROD MAINTENANCE ITEM STANDARD REPAIR LIMIT METHOD REMARKS Piston OD @ Top 53.65 -0.02 Max Diameter 53.95 -0.015 53.85 Replace Ovality 0.1 Piston and Cylinder Clearance 0.04~0.05 0.15 Replace Piston Ring Groove Clearance 0.03~0.07 0.10 Replace Piston Oversize Step 0.25 4 steps Top Ring and 2nd Ring Thickness 2 -0.01 -0.03 1.92 Replace Width 2.5 -0.01 0.55kg Tension 0.85 – 1.15kg 1 Replace End Gap 0.15 – 0.35 Replace Oil Ring Thickness 3.2 -0.01 -0.03 3.12 Replace Width 2.5 -0.1 Tension 1.0~1.3kg 0.65kg Replace End Gap 0.15~0.35 1 Replace Ring Gap Position 120∞ 3 equal spacesOut standard Adjust Avoid Piston Pin Axis Ring Oversizes 0.25 steps 4 steps Piston Pin OD 15 -0.0 +0.006 14.95 Replace Pin Hole in Piston ID 15 +0.012 -0.015.05 Replace Pin and Piston Clearance -0.006 ~ +0.012 0.06 Replace Hand push fit piston at 100∞C Conrod Small End Bush ID 15+0.027+0.016 15.07 Replace bush Conrod and Piston Pin Clearance 0.01~0.027 0.07 Replace Crankpin OD 24.94 +0.0+0.0124.90 Replace Crankpin Roller OD 5 (+0.001+0.003) Refer to conrod ID Replace 3Sizes; 52 per assembly for selective fit 5 (+0.0 -0.002) 5 (-0.003 -0.005) Conrod ID 34.95+0.03+0.02435.02 Axial Play 0.2~0.4 0.5 Adjust Radial Play 0.026~0.036 0.06 Replace

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SANYANG HD 125/ 200 Specifications And SERVICE MANUAL

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Filed Under (Sym) by admin on 24-11-2010

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heck and adjustment Fault condition Probable causes Loosen carburetor drain bolt to check if there is gasoline inside the carburetor Fuel supplied tom carburetor sufficient No fuel is supplied to carburetor Remove spark plug, install it into spark plug cap, and perform a spark test against engine ground. Perform cylinder compression pressure test. Check if sparks Weak sparks, no spark at all Low compression pressure or no pressure Re-start by following the starting procedures No ignition There are some signs of ignition, nut engine can not be started Remove the spark plug again and check it. Remove carburetor after 30 minutes and connect a hose onto fuel rich circuit. Then blow the hose with air Dry spark plug Wet spark plug Blowing in normal Blowing clogged 1. No fuel in fuel tank 2. Check if the pipes, fuel tank to carburetor and intake vacuum, are clogged. 3. Float valve clogged 4. Lines in fuel tank evaporation system clogged 5. Malfunction of fuel pump 6. Loosen or damaged fuel pump vacuum hose 7. Fuel filter clogged 1. Malfunction of spark plug 2. Spark plug foul 3. Malfunction of CDI set 4. Malfunction of AC generator 5. Ignition coil is in open or short circuit 6. Ignition coil leads open or short circuit 7. Malfunction of main switch 1. Piston ring seized 2. Malfunction of cylinder valves 3. Worn cylinder and piston ring 4. Cylinder gasket leak 5. Sand hole in compression parts 1. Malfunction of throttle valve operation 2. Air sucked into intake manifold 3. Incorrect ignition timing 1. Fuel level in carburetor too high 2. Malfunction of throttle valve operation 3. Throttle valve opening too wid

HARLEY-DAVIDSON V-ROD BIG BORE KIT INSTALLATION INSTRUCTIONS

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Filed Under (Harley Davidson) by admin on 31-10-2010

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The cylinder sleeves provided with the Wiseco V-Rod big bore kit have been finished honed to size and the piston to cylinder clearance has been set. Prior to installation, the sleeves must be washed in hot soapy water (not parts washer solvent) and dried. Coat the bore surface with motor oil and wipe it with a white towel. If the towel shows any remaining grit, repeat the hot soapy water washing process until the towel will only show clean motor oil. CAUTION: Test fit the cleaned sleeve (without O-Rings installed) into the engine block. Sleeve should drop into position. If sleeve will not easily drop into position, warm the engine block with a hair dryer until sleeve will drop into position. Remove sleeve, then continue installation procedures. From the bottom side of the sleeve, gently roll the 2-cylinder sleeve O-rings into the two grooves on each sleeve. Apply motor oil to the O-rings and gently install the sleeves into the block until bottomed. CAUTION: DO NOT ATTEMPT TO INSTALL SLEEVES WITHOUT LUBRICATING THE O-RINGS. FAILURE TO LUBRICATE O-RINGS COULD RESULT IN TORN OR DAMAGED O-RINGS THAT WOULD NOT BE EVIDENT UNTIL ENGINE WAS STARTED. INCORRECTLY INSTALLED O-RINGS CAN RESULT IN CATASTROPHIC ENGINE DAMAGE. NOTE: REFER TO THE OEM SERVICE MANUAL FOR ALL TORQUE SPECIFICATIONS PISTON RING PREPARATION Wiseco V-Rod pistons incorporate an advanced 2 ring system • The top ring is file-fit, and as such, requires that the end gap must be clearanced. The proper end gap clearance is .016-.018″ with the ring installed squarely in the bore. The top ring must be installed on the piston with the dot marking toward the top of the piston. • The oil ring is comprised of the expander and two rails. Install the expander first, and then the rails. Check to make sure the expander tips have not overlapped. It is not necessary to clearance the end gaps on the oil rails. The rails should be installed without modification. PISTON INSTALLATION The Wiseco V-Rod big bore kit is supplied with pistons that are front and rear cylinder specific. Install the front piston 4792M10795 in the front cylinder with the arrow facing the front of the engine. Install the rear piston 4793M10795 in the rear cylinder with the arrow facing the front of the engine. A piston ring compressor is required to install the pistons into the cylinders. Front of engine ➔ 4792M10795 ( Front piston) 4793M10795 ( Rear piston) FWD 4793M10795 FWD 4792M10795 For further information call the Wiseco Tech Line:

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