54
V-Twin Piston Kits include 2 Cast Alloy Pistons,
Genuine Hastings 3-Piece Ring Set, 2 Wrist Pins
and 4 Circlips.
OHV Piston Set use 22588-78 Pin Lock, VT No.
COMP STD
1340cc V2
Dia. Evolution
STD
.005
.010
.020
.030
.040
Piston Kits
Pistons include built in steel expansion strut as original.
Wrist Pin and Lock Kit
VT No. OEM
Fits
MC Moly Coated Piston Kits feature cast
construction with moly (moS2) coating which
helps reduce friction and wear, while allowing
adequate break in. Hastings Moly Rings Set,
wrist pins and locks included.
Size 1340 Evo 1340 Evo Evo 3
5
/
8
"
1984-99 1984-99
8.5:1
11:1 Comp. 10.5:1
Hastings Piston Ring Sets are replace-
ments for OEM ring sets and will also fit
our cast pistons. Available in standard and
oversize versions with either a cast com-
pression ring and 3-piece oil control ring in
cast or moly construction. Sold in sets for
two pistons.
88"Twin Cam
Mfg#
2M4942
Cast
Moly
STD
.005
.010
.020
95" Big Bore
Twin Cam
Mfg. #
2M4951
Cast
Moly
STD
.005
.010
80" FL-FX Evolution
1340cc
Mfg. #
6164
2M6164
Cast
Moly
STD
.005
.010
.020
.030
.040
SHOP TIP Piston Installation
Caution: Do not install piston pin without lubricating it first with motor oil or assembly lube. Touch up outer
edges of piston pins with emery cloth before installation.
1. Refer to applicable service manual for proper installation methods.
2. Piston should be measured front-to-rear at the base of piston skirt, perpendicular to wrist pin.
3. Piston should be set-up with the following tolerances:
Recommended piston/cylinder running clearances:
Minimum Maximum Preferred
Evolutionฎ Models .0015 .0022
.002
(Aluminum Cylinders)
Big Twin Models .0015 .003
.0025
(Cast Iron Cylinders)
Sportster Models .003 .004
.0035
(Cast Iron Cylinders)
Specifications for ring end-gap are supplied with the ring sets and vary by type and size.
Note: Run engine at moderate speeds for at least 500 miles, avoiding excessive running in lower gears, in
order to properly break-in new pistons and rings.
Moly Piston Kits
Wrist Pin Locks, 10 pks.
VT No. OEM
Years
Over 100,00 Sets Served!
