With two applications this Dowel,pin,12x20 is the most specified part.
A sample from the products for the Cylinder include: Cylinder Comp., Gasket,cylinder (nas), Dowel,pin,12x20, O-ring,78.3x2.
This part-list fiche shows all the components that make up the Trx300 Fourtrax 300 1988 (j) Usa Cylinder .