Cometic, cylinder base gasket FR/RR. .020" RCS

Type 'A'. .020" thick RCS (Rubber Coated Steel), stamped steel core with a .001" thick heat-resistant nitrile rubber coating on both sides. OEM replacement reference 16774-84A.
Explanation of Type 'A' (old style) and Type 'B' (new style) gaskets: There are 2 types of cylinder base gaskets for Evolution models. For convenience, we shall call them 'Type A' (old) and 'Type B' (new).
* The 'Type A' gasket was introduced on the 1984 Evolution Big Twin models, and can be used on all 84-99 Evo 1340cc models, fitting perfectly to the contour of the cylinder base. It fits 86-22 Evo XL models, but protrudes at the cylinder base. This can be a problem with silicone-beaded base gaskets.
* The 'Type B' gasket was 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 'The Factory' supplied from 1986 onwards for both the Evo Big Twin and the Evo XL Sportster models.
Both type 'A' and type 'B' have an identical inner diameter, 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
Cometic


Application
84-99 Evo Big Twin (NU)


OEM
16774-84A


Sales unit
Pack of 2 pcs


Diameter
0.02 inch


Packaging weight
0.043 kg


HS Code
84849000


Motorcycle family
BIG TWIN, DYNA, FX, FXR, SOFTAIL, TOURING


Original name
Cometic, cylinder base gasket set FR/RR. .020" RCS