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

Type 'B'. .020" thick RCS (Rubber Coated Steel), stamped steel core with a .001" thick heat-resistant nitrile rubber coating on both sides. OEM replacement reference 16774-86D, 16789-04.
Explanation of the 'type A' (old style) and 'type B' (new style) gaskets: There are 2 types of cylinder base gaskets for Evolution models. For convenience, we will 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 1340cc Evo models from 84-99, fitting the cylinder base contour perfectly. They fit 86-22 Evo XL models, but protrude at the cylinder base. This may 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 1340cc Evo 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 the 'A' and 'B' type gaskets have an identical inner diameter, oil hole location and bolt holes. 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; 88-22 XL Sportster1200 (Excl. 08-12 XR1200) (NU)


OEM
16774-86D, 16789-04


Sales unit
Pack of 2 pcs


Material
Coated Rubber


Diameter
0.02 inch


Packaging weight
0.035 kg


HS Code
84849000


Motorcycle family
DYNA, FX, FXR, SOFTAIL, SPORTSTER, TOURING


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