Hastings piston ring set, 3-7/16" diameter chr/moly. +.070"

Standard cylinder: 3.4375" (87.312mm) bore.
1st ring: 1.6mm.
2nd ring: 1.6mm.
Oil seal: 4.75mm.
Technical tip: Piston grooves vs. piston rings.
It is not difficult to determine whether a set of Hastings piston rings will fit a given piston. You must measure the height of the piston groove on the piston itself. The 2 upper grooves are for the compression rings, the lower groove is for the oil ring. In most cases, Hastings oil rings are the low-tension 3-piece flexible type. Ring heights are listed for reference.
Technical tip: Piston oversizes.
For each oversize, the cylinder diameter will increase by 0.010" (0.254mm). The standard cylinder diameter is stated for reference.
(Technical advice information provided by Hastings Manufacturing Company, Inc.)


Specifications


Brand
Hastings


Application
41-E78 1200cc/74" Big Twin (Excl. Flatheads) (NU)


Sales unit
Par


Material
Chromoly


Packaging weight
0.118 kg


HS Code
84099100


Motorcycle family
BIG TWIN, FX


Original name
Hastings, 3-7/16" bore chr/moly piston ring set. +.070"