1000 Iron Sportster 1972-85

• Will not fit XR style head.
• Includes: Forged pistons, rings, circlips & chrome piston pins.

K1600 1000cc 3.188"/STD 3.812"
$160.58 +Retail, 134.88 cost 

S1 White Lightning, S3/S3T Thunderbolt &Buell Models
(With 101HP Thunderstorm Heads installed)
• No cylinder head modification required.
• Includes: Forged pistons, rings, circlips & chrome piston pins.
K1703 1221cc 3.528"/.030
$235.42+ retail, $197.75 cost

1200 Evo Sportster 1988-03 (73 cu.in.) 1100 Evo Sportster 1986-87 All Evo Sportster &Buell models with Stock 1200 Heads

• No cylinder head modification required.
• Includes: Forged pistons, rings, circlips, & chrome piston pins.
9:1 Compression • Flat Top

K1664 1228cc 3.538"/.040
$235.42+ retail, $197.75 cost

1340 Evo Big Twin 1984-99 (80 cu.in.)

• Will fit Screamin’ Eagle cylinder head 9.5:1 compression.
• Includes: Forged pistons, rings, circlips & chrome piston pins.

K1643 1361cc 3.528"/.030
$200.88 + retail, $168.74 cost

1340 Evo Big Twin 1984-99 (80 cu.in.)

• Includes: Forged pistons, rings, circlips & chrome piston pins.
10:1 Compression • Domed

K1621 1345cc 3.524"/.027

1340 Evo 3 5/8 ” Big Bore Kits Stock Stroke 1984-99 Must use aftermarket engine case on 1990-95 models only (88 cu.in.)

Cases must be bored to accept big bore cylinders.
• Includes: Forged pistons, rings, circlips, head and base gaskets & chrome piston pins.
9.25:1 Compression • Flat Top
K1671 1442cc 3.630"/.005
$267.17 + retail, $224.42 cost