Kawasaki KX100 Phathead Combustion Chambers

Chamber selection:

KX40  - 7.4cc Stock compression

KX41  - 6.4cc  (95+ octane)

KX42  - 6.0cc (100+ octane)

KX43 -  5.6cc (105+ octane)

KX Stroker insert for Hotrods crank (listed as +4mm) is actually a +2mm  

Hotrods has only one part number  for the stroker so we are sure that there is not a +2mm and +4mm

If you have a Hot Rods stroker crank our insert will work