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 11 788 NEW PRODUCTS ADDED WEEKLY AT / MOTORCYCLESTOREHOUSE.COM COMETIC, CYL. BASE GASKETS Std bore replacement base gaskets. Note: RCS = Rubber Coated embossed Steel.,MLS = Multi Layer Steel 36-47 Knuckle & 74"/80" Flatheads; 30-36 VL; 21-29 J 561678 F&R set .020" fiber. Repl. 16774-21, 46-21 561679 F&R set .020" RCS 48-62 Panhead 561755 F&R set. 020" RCS 561185 Front .031" fiber. Repl. 16776-48 561186 Rear .031" fiber. Repl. 16777-48 63-84 Pan, Shovel 561680 Front. .031" fiber 561682 Rear. .031" fiber 561863 F&R set. .020" fiber 561580 F&R set. .020" MLS 561641 F&R set. 020" RCS 84-99 Evo Big Twin Type A is the early gasket as used on 84-85 Evo B.T. After the introduction of the Evo XL in 1986, which must use the type B base gasket since it has a smaller outside perimeter to fit the XL cylinders, the type A was no longer available from OEM at that moment. Both gasket types will fit Evo Big Twin models. 561169 .020" fiber (type A) 561193 .020" fiber (type B) 561175 .010" RCS (type A) 561195 .010" RCS (type B) 561170 .020" RCS (type A) 561194 .020" RCS (type B) 99-17 88"/96" 3-3/4" and 95"/103" 3-7/8" Twin Cam 561160 O-ring. Repl. 11256 18-23 Softail; 17-23 Touring (107/114/117" engines) 568459 .010" RCS 568458 .014" RCS. Stock thickness. Repl. 16500332 568460 .020" RCS 923964 .010" RCS Gen2 Embossed 923963 .014" RCS Gen2 Embossed 923965 .020" RCS Gen2 Embossed 57-85 XL Sportster 561201 57-71 XL 900 .012" fiber 561202 72-85 XL 1000 .031" fiber 86-22 XL Sportster (excl. 08-12 XR1200) 561193 .020" fiber (type B) (pr) 561195 .010" RCS (type B) (pr) 561194 .020" RCS (type B) (pr) 561185 561186 561169 561193 561195 561170 561160 561201 561202 561193 561195 So, what about Cometic quality? Let their dedication to the motorsport market speak for itself. Cometic supplies state-of-the-art sealing techniques to several high-end sports where sealing ability under extreme loads is of the highest importance. From standard cruisers to drag racing, cars, trucks, marine equipment and even Nascar racing. Case closed! COMETIC, BIG BORE CYL. BASE GASKET SETS Big Bore replacement base gasket sets with one front & one rear gasket. 48-65 Panhead 561815 .020" for S&S cylinders. RCS 3-5/8" 63-84 Shovel, Panhead 561864 020" fiber 3-5/8" 561187 031" fiber 3-5/8" 561581 .020" MLS 3-5/8" 561642 .020" RCS 3-5/8" 84-99 Evo Big Twin 561171 .020" fiber 3-5/8" 561825 .020" fiber 3-5/8" fits S&S only 561176 .010" SLS 3-5/8", 3-3/4" 561172 .020" SLS 3-5/8", 3-3/4" 561173 .020" fiber 3-13/16" 561490 .010" SLS 3-13/16" 561491 .020" SLS 3-13/16" 561174 .020" fiber 4" 561492 .010" SLS 4", S&S & TP cylinders 561493 .020" SLS 4", S&S & TP cylinders 561494 .010" SLS 4-1/8", TP cyl. 561495 .020" SLS 4-1/8", TP cyl. 561565 .010" SLS 4-1/8" S&S cylinders 561566 .020" SLS 4-1/8" S&S cylinders 99-17 Twin Cam (excl. Twin Cooled) 561511 .010" SLS 4" bore 561512 .020" SLS 4" bore 561513 .010" SLS 4-1/8" bore 561514 .020" SLS 4-1/8" bore 17-23 M8 Touring, Trike with water cooled heads 568481 .014" RCS 4.320" big bore 568482 .014" RCS 4.500" big bore 86-22 XL Sportster (excl. 18-12 XR1200) 561188 .010" SLS 3-5/8" 561189 .020" SLS 3-5/8" 561171 561176 568481 561187 COMETIC, COPPER CYL. BASE GASKETS Specialty copper base gaskets for mechanics that want to achieve a specific compression ratio. Builders sets contain 2 gaskets of each available thickness. 84-99 Evo Big Twin Type 'A' gaskets. 561221 Builders set, 3-1/2" bore (8-pk) 561205 .005" 3-1/2" Std bore 561206 .010" 3-1/2" Std bore 561207 .015" 3-1/2" Std bore 561208 .020" 3-1/2" Std bore 561222 Builders set, 3-5/8" bore (8-pk) 561209 .005" 3-5/8" 561210 .010" 3-5/8" 561211 .015" 3-5/8" 561212 .020" 3-5/8" 561223 Builders set, 3-13/16" bore (8-pk) 561213 .005" 3-13/16" 561215 .015" 3-13/16" 561216 .020" 3-13/16" 86-22 XL Sportster (excl. 08-12 XR1200) Type 'B' gasket. 561224 Builders set. Std. bore (8-pk) 561217 .005" Std bore 561218 .010" Std bore 561219 .015" Std bore 561220 .020" Std bore 561221 Evolution base gaskets There are 2 types of cylinder base gaskets for Evolution models available. For convenience sake we'll call them 'type A' (early) and 'type B' (late). See photo. *Type A' gasket was introduced on the 1984 Evolution Big Twin models, and can be used on all of the 84-99 1340cc Evo models and will follow the contoures of the cylinder base perfectly. They will fit 86-22 Evo XL, but stick out at the cylinder base. This can be a problem with silicone beaded base gaskets. *Type B' gasket was introduced on Evolution XL Sportster models in 1986, and will fit all Evo XL models, but also all 84-99 Evo 1340cc models although the Big Twin cylinder base is a bit larger than the gasket. The 'type B' is the only gasket type that 'The Factory' supplied from 1986 onwards for both Evo Big Twin and Evo XL Sportster models. Both type 'A' and type 'B' have identical inner bore diameter, oil hole and stud hole locations. Gaskets for front & rear cylinder are identical. Only difference between the 'A' & 'B' gaskets is the outside perimeter. Information provided by James Gaskets, Inc. tech-tip 110 (type 'A'*) (type 'B'*) 568458 COMETIC BASE COMETIC BASE BIG BORE COMETIC BASE
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