KPMI, intake valve guide. Cast iron. +.002"
Description
Cast iron. Comes with special shoulder for ease of installation. Takes OEM valve seals. Shortened to accept valve lifts up to .600". Cast iron offers maximum durability and wear resistance. Perfect for long distance touring applications. It is the standard since the invention of the piston engine.
Note: Standard non-oversize dimensions (for reference only) are 0.5620" O.D. (14.27mm); .3085" I.D. (7.84mm); 2.100" OAL (53.34mm).
Fitment
84-99 Evo Big Twin; 99-04 Twin Cam; 86-03 XL Sportster (NU)
Hastings, 3-1/2" bore piston ring set. Chr/Moly. +.010"
Description
Std cyl. bore: 3.4980" (88.85 mm).
2M6164010
1st. ring: 1.6mm.
2nd ring: 1.6mm.
oil ring: 4.0mm.
Tech tip: Piston grooves vs piston rings.
It's not difficult to determine if a Hastings piston ring set will fit a certain piston. You should measure the height of the piston groove in the piston itself. The 2 top grooves will be for compression rings, the lower groove will be for the oil ring. In most cases Hastings oil rings are of the low tension 3-piece flex vent type. Ring heights are listed for reference.
Tech tip: Piston oversizes.
For each oversize cylinder diameter will increase with .010" (0.254mm). The standard bore of the cylinder is listed for reference.
(Information provided by Hastings Manufacturing Company, Inc.).
Fitment
84-99 Evo Big Twin; 88-03 XL Sportster1200 (NU)