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TRIUMPH 750 BIG BORE CYLINDER AND PISTON SET FOR 650 TWINS INSTALLATION

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

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Step 1. Unpack your big bore kit and inspect the contents. There should be the following: 1. Cylinder x l 2. piston with wristpin x 2 3. Hepolite piston ring set x l 4. Special big bore head gasket Step 2. Thoroughly wash the cylinder bores with soap and water. Do not use solvent! Dry bores with air or a lint free towel and let completely air dry. This step is most important and will greatly extend the life of the pistons. Step 3. Following the procedure outlined in your service manual, drain the fuel tank, remove the exhaust system, fuel tank and carburetors. Have a catch basin handy to capture any fuel that may spill from the carburetors, as fuel is highly flammable and can be ignited by a dryer pilot light etc. from a long distance. Clean up any spilled fuel immediately and dispose of away from any source of ignition. Store the fuel tank in a well vented area, outdoors is best, in the event your fuel taps should leak. Step 4. Remove the rocker boxes by slacking the 9 head bolts a little at a time in a star pattern. Remove the 6 nuts at the front and back of the head. Remove the 4 corner rocker box bolts. Remove the head bolts and rocker boxes. Remove the push rods. Examine the push rods to insure they are straight and the ends are tight. Replace any suspect push rod. Step 5. Remove the cylinder head. Now would be a good time for guide and valve renewal. This is best left to an expert. More cylinder heads have been ruined by auto machine shops than by hard use. If you do not have a qualified shop in your area please call for a referral. Step 6. Remove the push rod tubes and the cylinder base nuts. Clip rubber bands around the top of the lifters to keep them from dropping into the crankcase. Have a few lint free rags handy. Bring the pistons to the top of the stroke and begin lifting off the cylinder. If the cylinder is hard to lift off, thread a nut on one of the base studs and use a tire lever to pry against the bottom fin close to its base using the stud as a fulcrum. After partially raising the cylinder stuff the crankcase mouth with rags to keep any carbon or broken rings from entering the crankcase. These will remain in place until step 12. Step 7. Leaving the rags in the crankcase remove the wrist pin circlips from the pistons and discard. Heat the piston and gently push the wrist pin out. Do not use force as this can damage the connecting rod or its bearings. Be sure to account for all the clips as one left in the crankcase can do extensive damage. Step 8. Clean all gasket surfaces to remove any traces of the old gaskets. Use Pennatex gasket remover if needed. Be very careful not to scratch the gasket surface or to allow any gasket particles to enter the crankcase. Even a small bit of gasket can stop the oil pump from working! Step 9. Note the direction and location of the lifters. These must be replaced in the same position as when removed. Remove the lifter blocks from the old cylinder. Start by removing the small retaining bolts and washers. The lifter blocks are extremely fragile and are easily broken. They are also very expensive so great care must be taken in this step! Triumph special tool 222-616008 is advisable here. Apply pressure to the center of the block only. Do not press against the tangs that locate the lifter! A tool can be fabricated using two dowels to locate in the lifter holes. Step 10. Clean and examine the lifters and camshaft faces. Clean the lifter blocks and remove the sealing oring under the locating flange. Replace these with the new orings in the gasket set. Apply a smear of gasket sealant to the lifter block oring and press into the new cylinder. Be sure the lifter block is parallel with the bores and the grooved block is on the exhaust side. Apply a small amount of assembly oil to the lifters and replace in the exact position they came from

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ODYSSEY DRYCELL MOTORCYCLE BATTERY COMPATIBILITY

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Filed Under (Triumph) by admin on 30-10-2010

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BMW 1200 1200 1150 1100 1100 1000 1000 1000 1000 900 850 800 800 800 750 750 750 750 750 650 650 600 600 500 BUELL 1200 1200 1200 1000 DUCATI 860 750 500 HARLEY DAVIDSON 1570 1570 1450 1450 1340 1340 1340 1200 883 HONDA 1800 1500 1200 1100 1000 1000 900 750 750 650 650 650 600 400 200 150 150 125 K1200RS, LT R1200C R1150GS, R R1100GS/R R1100RS/T/S/LT “K” Models R100/7 100RS R100GS, R, RS, RT R90/6, R90S R850R R80GS, R80ST R80, R80RT R80/7/RT K75, RT K75C, S R75/5 R75/7 R75/6 R65 R65LS R60/5 R60/6, R60/7 R50/5 S1 Lightning X1, S3, S3T, M2 S2/T, RS1200, RR1200 RR1000 GT, GTS GT, Laguna Seca GTL, GTV, Sport FXST, FLST FXD FXD FXST, FLST FXD FXST, FLST FL/H/T/HT XL, XLH XLH, XLH GL1800, VTX1800C Gold Wing-All Gold Wing-All Gold Wing-GL1100 CBX1000, SS opt. Gold Wing-GL1000 CBR900R,RR CB750A (Hondamatic) VFR740R/ RVF750R NT650, SLR650, NX650 Vigor 650 XR650L VT600C, CD, CBR600 CBR400F CB-1 TR200 Fat Cat CH150 Elite FES150 FES125, Pantheon (97 -) (98 -) (00 -) (94-00) (90 -) (83-93) (76-84) (83) (87-95) (69-76) (95-97) (80-96) (84-95) (78-84) (85-95) (85-95) (70-73) (76-84) (69-76) (84-95) (78-84) (70-73) (69-84) (70-73) (96-99) (ALL) (ALL) (87) (2007) (2007) (99-06) (00-06) (97-99) (91-99) (80-96) (97-03) (97-02) (01-06) (88-00) (84-87) (80-83) (82) (75-79) (93-99) (76-78) (90/94) (88-91) (ALL) (93-06) (87-03) (89-90) (86) (87) (ALL) (ALL) #3561 #3561 #3561 #3561 #3561 #4989 #4989 #3561 #4989 #4989 #3561 #3561 #4989 #4989 #4989 #3561 #3561 #4989 #4989 #4989 #3561 #3561 #4989 #3561 #3591** #3591 #3591 #3591 #4989 #4989 #3561 #3591 #2528 #2528 #3591 #2528 #3591 #3560 #2528** #2528** #2528 #3560* #3560* #3560* #3560* #3560* #2519* #3560* #2519* #2519* #2519* #2519* #2519* #2519* #2519* #2519* #2519* #2519* PC680 PC680 PC680 PC680 PC680 PC925L PC925L PC680 PC925L PC925L PC680 PC680 PC925L PC925L PC925L PC680 PC680 PC925L PC925L PC925L PC680 PC680 PC925L PC680 PC545MJ PC545MJ PC545MJ PC545MJ PC925L PC925L PC680 PC545MJ PC545 PC545 PC545MJ PC545 PC545MJ PC680MJ PC545 PC545 PC545 PC680MJ PC680MJ PC680MJ PC680MJ PC680MJ PC310 PC680MJ PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC310 cc model (year) cat. # mfg sku # KAWASAKI 1500 1500 1300 1000 1000 900 900 750 750 650 636 600 600 KTM 640 620 400 400 MOTO GUZZ I 1100 1100 1100 1000 1000 850 850 750 650 650 650 500 POLARIS All SUZUKI 1400 900 750 750 750 650 600 600 600 600 400 TRIUMPH 600 YAMAHA 1600 1300 1300 1200 1100 1100 1100 920 600 600 VN 1500-A Vulcan VN 1500-C Vulcan KZ 1300 Touring KZ 1000-P Police Z1000 ZX900-C, Ninja ZX900-E, F Ninja KZ750-L, Ninja Zx750 Ninja ZX, 7RR KLX650C, R ZX636-B Ninja ZX-6R ZX600-G, J Ninja ZX ZX600-K Ninja ZX Adventure, Duke, RXC Adventure, Duke, LC4 LC4 E/XC RXC LC4 Cali/Spc/Jackl/Stone/EV Quota/Sport 1100 VII EV/Bassa California III,Quota,Millie Convert,Daytona, LeMans LeMans T3, T4, T5 Nevada,NTX,Strada,V7,V75 NTX V65 V65 Florida V50 Victory GV 1400GC RF900, R, S, ZS GSX750F Katana GSX-R750 GSXR750W DR650SE GSF600S Bandit GSX600F Katana GSX-R600 RF600R, S GSF400 Bandit Daytona 600 XV 1600 Road Star 1300 Royal Star XVZ Venture Royale XVZ12T Venture XJ1100 Maxim XS 1100, L, S XV 1100, S/ Virago XV 920/R/M Virago XJ600S Seca II XT600E (87-98) (96-97) (79-82) (82-05) (03-04) (98-99) (00-04) (93) (91-97) (93-96) (03-04) (98-02) (03) (99-02) (96-98) (96-98) (96-01) (94-05) (97-02) (98-99) (ALL) (86-88) (94-97) (98-03) (96-99) (94-95) (96-04) (96-03) (98-04) (97-03) (94-96) (91-93) (03-04) (99-03) (96-03) (86-92) (83-85) (82) (78-92) (86-99) (81-83) (92-98) (90-95) #3560 #3560 #3560 #3560 #2519* #2519* #2519* #2519* #2519* #2519* #2519* #2519* #2519* #2519* #2519* #2519* #2519* #4989 #2528 #4989 #4989 #4989 #4989 #4989 #3561 #3561 #4989 #3561 #4989 #2519* #3560 #2519* #2519* #2519* #2519* #2519* #2519* #2519* #2519* #2519* #2519* #2519* #2528*** #2528*** #3560 #3560 #3560 #3560 #3560 #3560 #2519* #2519* PC680MJ PC680MJ PC680MJ PC680MJ PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC925L PC545 PC925L PC925L PC925L PC925L PC925L PC680 PC680 PC925L PC680 PC925L PC310 PC680MJ PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC310 PC545 PC545 PC680MJ PC680MJ PC680MJ PC680MJ PC680MJ PC680MJ PC310 PC310

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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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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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Honda CB 750 SOHC 8v Performance and Racing Camshafts Installation

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Filed Under (Honda) by admin on 18-11-2011

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Upon installation of your WEB-CAM camshaft, check the following. These operations are very important to engine
life, please follow instructions! If your cam is described as a bolt-in in the WEB-CAM catalog, you may skip 1-5
below. Check piston to valve clearance. Provide the necessary clearance by removing material from the piston Minimum .050″ intake, .080″ exhaust.1. Check valve to valve clearance. It may be necessary to remove material from the valves or sink valve seat height in head. 2. Check the valve spring retainer to valve guide clearance at maximum lift. Remove material from the top,of valve guides to provide a minimum of .030″ clearance. 3. Check for valve spring coil bind at maximum valve lift. Clearance at every coil should be at least .015″4. Be certain that cam and/or rocker arms rotate
freely in head or block. Remove material from head,block, or rocker arms where necessary.5. Engine and cam life depend on proper installation. New or reground followers should be used when installing WEB-CAM profiles. Apply the provided
assembly lube to cam lobe and follower surfaces

SUZUKI MOTORCYCLES Gsxr 600, Gsxr 750, Gsxr 1000 teak the lead

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Filed Under (Suzuki) by admin on 12-11-2010

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The launch of the sixth generation of Gsxr marked a shift in Suzuki’s emphasis on two fronts. One, the Gsxr 1000 now took the upper hand in the development stakes. Historically, the Gsxr 750 led the march-arriving first, gaining the most recent technology, absorbing the lion’s share of corporate pride-but by 2003 the Gsxr 1000 was in the lead. Two, the Gsxr 1000 represents another, more subtle shift for Suzuki engineering, in which the designers-the lucky guys who get to clothe these amazing machines-have more freedom of expression. With this generation, the designs turned edgier, sharper, more aggressive looking than ever. What’s more, the Gsxr 1000 K3 would be the proving ground for a host of changes brought to the Gsxr 600 and Gsxr 750 for 2004. In fact, nearly every upgrade to the smaller bikes appeared on the Gsxr 1000 a year before. But the real impetus for driving the Gsxr 1000 to the head of development and, indeed, shortening its development cycle was competition both on the track and in the showroom. For the track, it was understood that Superbike racing would revert to allowing 1000 cc four-cylinder bikes in place of the 750s that had been the limit since 1982. In 2002, Yoshimura and Mat Mladin barely lost the AMA Superbike crown to Nicky Hayden aboard the Honda RC5!. But it would be the RC’s swan song of competitiveness with the change to 1000 cc fours. To keep speeds in check, the AMA Superbike rules would require 1000 cc fours to have some additional limitations compared to the twins and triples. For example, “Cylinder heads may be ported and machined, but altering of valve angles will not be permitted; aftermarket valves, springs, retainers, and other valve-train components will be permitted; valves must be stock size and same basic material as original equipment; aftermarket camshafts will be permitted, but earn lift and resulting valve lift must be no greater than stock. “In addition, the “stock crankshaft must be retained, The only allowable modifications are balancing, polishing of bearing surfaces and attachment of accessory drives. Homologated transmission gear sets (one optional set of ratios per approved model) will be permitted. Optional sets will be price-controlled and must be available to any legitimate AMA Superbike competitor. Homologated fuel-injection throttle-body assemblies (one optional type per approved model) and aftermarket airboxes will be permitted. Modifications to throttle bodies will not be permitted. Optional throttle bodies will be price-controlled and must be available to any legitimate AMA Superbike competitor.” The thinking was simple: keep the liter bikes from sucking through massive throttle bodies, and the horsepower might not (and, it was hoped, would not) go through the roof. In preparation for racing, Suzuki moto wanted to make a host of small changes to the Gsxr 1000, but its motivation was also to keep the bike at the forefront of open-class street bikes. Suzuki engineers knew that Honda and Kawasaki were readying all-new models-the CBR 954 RR and the ZX 9 R had long since been vanquished-and rumor had it that Yamaha was ready with yet another push with the R1.It was the right time to make alterations to the Gsxr 1000. Heading the list was, as one might expect, a revised engine.

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Honda Shadow Aero 750 Turn Signal Cancellation Unit Installation Procedures

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Filed Under (Honda) by admin on 29-11-2010

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Left TurnSignal Right TurnSignal Turn Signal Switch (for ref. Only) CIRCUIT CONNECTIONS AFTER INSTALLATION of Cancellation Unit Original+12 volts motorcycle supply power for flasher Ground (thiswiredoesnot exist on all models) Output to switch Power Power Red Yellow Gray Green Ground Green/Red Blue/Red Turn Signal Cancellation Unit Identify the positive power wire to the turn signal flasher. A test light with the probe touched to this wire will stay on steady and flash with the turn signals. Cut the wire and install the connectors observing the polarity as shown. Connect the Red and Yellow wires as shown. not Identify the flasher output wire to the signal switch and attach the gray wire by soldering or use the supplied red tap connector. Place the unit in a suitable area on your particular motorcycle. It is suggested under the seat providing access to the turn signal flasher. Connect the units ground (green) wire to frame (neg) ground Assure it’sareliable connection. IF THE GROUND WIRE BECOMES DISCONNECTED THE UNIT WILL BURN UP. using the supplied ring terminal. Identify the brake light circuit per the motorcycle wiring diagram. Using a test light verify the correct circuit using the following procedure. Connect the test light alligator clip (negative side) to frame ground. Using the positive tip probe the circuit. The proper circuit will illuminate the the brake is applied. Attach the Green/Red wire to this circuit. test light when The factory cancellation time is set at approximately 23 flashes. The length of time for cancellation can be decreased to approximately 15 counts by setting the program listed in the programming box

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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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KTM 250 SX-F & XC-F Piston Kits Installation and Removal Manual

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Filed Under (KTM) by admin on 28-01-2012

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Features* Benefits •*Dedicated*forging •*Light*weight,*superior*strength,*optimized*design •*Stock*Compression •*Matches*OEM*compression*ratio •*Dome*design Improved*flame*travel*to*maximize*air/*fuel*burn*efficiency •*Chrome*plated*piston*pin •*Reduced*friction,*improved*scuff*resistance •*Horizontal*slot*pin*oiling .•*Improved*lubrication,*better*pin*oiling,*reduced*friction •*Pressure*seal*groove •*Maximum*ring*seal •*Skirt*coated •*Reduced*friction,*quieter*operation,*improved*scuff*resistance •*Dedicated*rings ……………………………… •*Optimized*for*each*application,*light*weight,*high*perfromance,*better*oil*control •*Experience ……………………………………. •*68*years*as*the*industry*leader*in*forged*piston*technology Piston sold complete*with:*Rings,*piston*pin,*and*circlips. Complete*top*end*kits*sold*complete*with:*Piston,*rings,*piston*pin,*circlips,*and*complete*top*end*gasket*kit

S&S Super Stock Cylinder Head Kit Installation Instructions for 1984 And Later Evolution Big Twin and Sportster Engines

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Filed Under (Harley Davidson) by admin on 28-11-2010

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check Piston Alignment in Cylinder Bore The purpose of this procedure is to check for and correct possible piston misalignment in the cylinder bore. During normal manufacturing, engine components such as crankcases, cylinders, and connecting rods can be machined to dimensions within factory specifications but on the extreme ends of the tolerance range. Sometimes these components when combined together form an assembly that is borderline or actually “out of print”. The worst result is that the pistons can run cocked in the cylinder bores causing the connecting rods to thrust to the sides exerting unnecessary stress on the pistons, rings, rod bearings and other related parts. This procedure is not the same as “blue printing”, but it provides almost the same result. We feel that not enough emphasis is given to checking the piston alignment in the cylinder bore. NOTE – All engines should be checked upon disassembly. This applies to any engine receiving new pistons which includes those being completely overhauled. CAUTION – Pistons which do not run true in cylinder bores may cause excessive connecting rod side thrusting. This may lead to premature ring, piston, connecting rod and rod bearing wear and eventual failure of these parts. Visual Procedure A. Reinstall cylinders on old pistons without rings. Hold cylinders securely in place. B. Move piston tight toward camside of engine. C. Turn engine over in normal direction of travel 2 or 3 revolutions and observe piston during process. D. Move piston toward driveside of engine and repeat Step C. If misalignment exists, piston will appear closer to cylinder wall at one point around circumference. Condition can be corrected by bending rod in opposite direction. Figure 1 shows an exaggerated side view. E. Repeat Steps B to D for other cylinder. F. Remove pistons and cylinders. Observe pistons for wear spots on sides above top compression ring. If either side near wristpin is worn clean while side opposite is carboned up, then piston was not running straight and true in cylinder bore. Piston will also generally show diagonal wear pattern on thrust faces of skirts and possibly signs of connecting rod to wristpin boss contact inside piston.

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