James Gaskets
James, seal plate derby cover. RCM
James, seal plate derby cover. RCM
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RCM (Rubber Coated Metal). Late model seal plate as replacement for the early OEM O-ring for improved sealing. OEM replacement reference 25416-99; 25416-99A; 25416-99B (O-ring); 25416-99C (seal plate). James'' RCM gaskets consists of a .020" thick stainless spring steel base covered with a .001" thick heat resistant Viton rubber on both sides. A very strong gasket which requires no re-torquing. Gaskets will not become brittle or burn out.
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Why buy from Forty5°
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Verified compatibility
Every part we ship is checked against your bike's platform, year, and engine. If it doesn't fit, we tell you before you check out.
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Workshop installation
Book a serviceHave us fit it. Book installation at parts intake — same-day on most jobs, master techs only.
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Founder-led aftersales
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