Evo Sportster rocker cover set (1 cyl.). Black - 91-03 XL; 86-90 XL crankvented models when umbrella valve is nut used (NU)) 978358 as is stock with Evolution

as is stock with Evolution motors

Cover has correct shape for 41-49 models but does not accept rotor

Replacement needle to adjust the mid-range on Keihin CV carburetors

Piston weight 357gr

SPIKE NUTS

Evo Sportster rocker cover set (1 cyl.). Black - 91-03 XL; 86-90 XL crankvented models when umbrella valve is nut used (NU)) 978358 as is stock with EvolutionBlack finish. OEM style rocker covers. Complete set for one cylinder head. Includes gaskets. Hardware is not included. Note: Rocker cover sets are for for late head vented models. Will fit early 86 90 crankcase vented Sportster models when the umbrella valve is not used.