Speedo Seats & Luggage- racks Frame Chassis Suspension Forktubes Wheels Brake Fenders Gastanks Motorparts Gaskets Intake Transmission & Driveline Exhaust Electrical & Lights Handlebars, Cables & Mirrors Oil tanks Oil & Chemicals Fasteners Windshields Forward controls, Footpegs Miscellaneous GASKETS & SEALS 11 787 AFTERMARKET PARTS & ACCESSORIES FOR CUSTOM MOTORCYCLES / MOTORCYCLESTOREHOUSE.COM 518480 518284 518286 920122 CYLINDER HEAD GASKETS, COPPER Replacement head gaskets for early H-D models. Copper material unless mentioned otherwise. XL Sportster 518284 James. 72-E73 XL. .016" thick. Repl. 16769-72A 518480 James. L73-85 XL. .016" thick. Repl. 16769-73 518286 James. 82-85 XL. .045" thick, low compr. ratio. Repl. 16769-82 Flathead 518283 37-48 74" & 80" Flathead B.T. Repl. 16769-36 920122 James. 39-73 45" (750cc) Flathead models. Repl. 16768-39 518283 526195 JAMES, EVO 3-5/8" BIG BORE HEAD GASKETS Fits 84-99 Evo B.T. and 86-22 Evo XL (excl. XR1200) with 3-5/8" big bore cylinders. .045" thick, final crush .042". 526195 Big bore head gaskets EVO 3-5/8" BIG BORE COPPER JAMES, CYLINDER LINER O-RINGS Cylinder liner seals for 85mm (750) and 69mm (500) bore wet cylinder liners, as used in XG Street models. Prevents cooling fluid leaking away between liner & cylinder. 568824 15-20 XG750, 750A. 85mm. Repl. 11900027 568826 15-20 XG500. 69mm. Repl. 11900044 568824 JAMES - HEAD JAMES - CYL. LINER SEALS 84-up head gaskets Everybody knows it's far from desirable to burn rubber with a cold engine, for obvious reasons. This is even more true for the Evolution / Twin Cam / M8 engine, which are more sensible for blowing head and base gaskets when doing so. This is because of the different cylinder to cylinder head mounting system when compared to the Knuckle, Pan or Shovel. Be easy on the throttle to prevent the 'cold-start head gasket blowout', especially custom kickstart motors are sensible, and allow the cylinders to warm-up so they can expand and give sufficient pressure to the gaskets. Never blip the throttle on a cold engine. Do not underestimate cylinder length expansion, it is considerable, so always warm-up the engine with minimal load. Upon installation, make sure the head and cylinder gasket surface is totally flat and clean. Overtightening of the head bolts is not recommended, this can stretch the cylinder studs which distorts torque values and may even damage threads in the crankcases. For correct torque values refer to crankcase manufacturer. Make sure the cylinder studs are installed in the cases with red Locktite or similar. Studs have known to work themselves loose after installing the cylinder heads, resulting in decreased torque and therefore blown gaskets. When installing head gaskets with a fire-ring, make sure the wider part of the fire-ring (when present) will face the cylinder and the narrow side of the fire-ring will face the cylinder head (see photo). After the heads are installed, a proper first time engine start-up is critical to ac hieve a permanent and lasting head gasket seal. Installing head gaskets with a fire-ring Make sure the wider part of the fire-ring (when present) will face the cylinder and the narrow side of the fire-ring will face the cylinder head. Information supplied by S&S Cycle, Inc. tech-tip 109 518425 518430 518345 518350 503030 920860 (type 'A'*) (type 'B'*) JAMES, STD BORE CYLINDER BASE GASKETS Replacement stock style paper gaskets, unless mentioned otherwise. 29-73 45" (750cc) Flatheads 518293 Front & rear. .020". Repl. 16775-29 52-56 K, KH Flatheads 518239 Front & rear. .031". Repl. 16775-52 57-71 XL 900 518240 Front & rear. .031". Repl. 16774-57 72-85 XL 1000 518235 Front & rear. .031". Repl. 16774-72 36-47 Knuckle & 74"/80" Flatheads; 30-36 VL; 21-29 J 518289 Front & rear. .031". Repl. 16774-21, 46-21 48-62 Big Twin 518425 Front. .031". Repl. 16776-48 518430 Rear. .031". Repl. 16777-48 63-84 Big Twin 518345 Front. .032". Repl. 16776-63 518350 Rear. .032". Repl. 16777-63 84-99 Evo B.T. (type 'A') 503030 Front & rear. .020" Repl. 16774-84A 84-99 Evo B.T.; 86-17 XL Sportster (excl. XR1200) (type 'B') 920860 Front & rear. .020". Repl. 16774-86D, 16789-04 99-17 88" up to 103" 3-3/4" bore Twin Cam 518703 Front & rear. (O-ring). Repl. 11256 18-23 Softail; 17-23 Touring. (107/114/117" engines) 568352 Front & rear. .025" foamet with bead. Repl. 16500332 72-up XR750 526230 Front & rear. .020". Repl. 16774-72R 518703 568352 JAMES - BASE
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