Athena, cylinder base gasket. FR/RR .015" RCS. Pack of 5

S410195006010U Inside diameter from 3" to 3-1/2".
Front/rear.
Type 'B'.
0.4mm (.015") RCS (Rubber-coated steel).
Gasket with stamped steel core and heat-resistant nitrile rubber coating of 0.001" on both sides.
OEM replacement reference 16774-86C, 16774-86D, 16789-04.
Note: Explanation of 'A' and 'B' type cylinder base gaskets for Evolution.
There are 2 types of cylinder base gaskets for Evolution models. For convenience we call them 'type A' (old style) and 'type B' (recent style).
- 'Type A' gasket: Introduced on the 1984 Evolution Big Twin models and can be used on all 84-99 Evo 1340cc models, fitting the cylinder base contours perfectly. Fits 86-22 Evo XL, but protrudes at the cylinder base. This can be an issue with silicone-beaded base gaskets.
- 'Type B' gasket: Introduced on Evolution XL Sportster models in 1986 and fits all Evo XL models, as well as all 84-99 Evo 1340cc models, although the Big Twin cylinder base is slightly larger than the gasket.
The 'type B' is the only gasket type that 'The Factory' supplied from 1986 onwards for the Evo Big Twin and Evo XL Sportster models.
Both the 'A' and 'B' type gaskets have an identical bore, oil hole and bolt hole location. The gaskets for the front and rear cylinder are identical. The only difference between the 'A' and 'B' gaskets is the outer perimeter.


Specifications


Brand
Athena


Application
84-99 Evo Big Twin; 86-22 XL Sportster (Excl. 08-12 XR1200) (NU)


OEM
16774-86C, 16774-86D, 16789-04


Packaging weight
0.033 kg


HS Code
87141090


Original name
Athena, cylinder base gasket. FR/RR .015" RCS. 5-pack