James Gaskets, cylinder base gasket. FR/RR .020" paper

'Type B'. Front/rear.
Fibre-reinforced paper, 0.020" thick.
Final crush 0.016".
OEM replacement reference 16774-86D, 16789-04.
Note: Explanation of the Evolution 'Type A' and 'B' cylinder base gaskets.
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 contours of the cylinder base perfectly. Fits 86-22 Evo XLs, 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 type of gasket that 'The Factory' supplied from 1986 onwards for both models, Evo Big Twin and Evo XL Sportster.
Both 'Type A' and 'Type B' gaskets have identical inner diameter, oil orifice and bolt hole locations. The gaskets for the front and rear cylinder are identical. The only difference between gaskets 'A' and 'B' is the outer perimeter.


Specifications


Brand
James Gaskets


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


OEM
16774-86D, 16789-04


Sales unit
Pack of 10 pcs


Material
Paper


Packaging weight
0.049 kg


HS Code
84849000


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


Original name
James gaskets, cylinder base. FR/RR .020" paper