Motorcycle Engine Seal For Kawasaki 454 EN400 Twin 1985-1994 Work for Fit For Kawasaki EN400 Twin 1989 400 1990-1994 EN450 454LTD 1985-1990 cruiser motorcycle cylinder head base connecting assembly Align bolt hole layout; support direct bolt on assembly without or extra auxiliary fittings Block combustion seepage; keep steady engine running during daily street cruising riding Adopt multi layer composite sealing sheets; feature smooth trimmed edges for complete joint contact Match cylinder housing outline thickness; fill all connecting gaps to retain consistent sealing tightness