General Info on Rotary Kits 

This is a general list of parts available to convert mazda 13b/12a type
engines to 3 or 4 rotor variants ,only the modified parts are 
listed as most others are mazda items or are easily fabricated
by a competent engine builder.
All prices are in NZ$ and are ex factory so no allowances for 
shipping etc have been made .
NZ customers should note that gst is charged on top of these prices.

1. 3rotor crank assy NZ$2100 (12a based version same price)
2. 4rotor crank assy NZ$3200 (includes special rear c/weight)(12a same price)
3. Centre housing modification for 3 or 4 rotor kits NZ$700 (2 req for 4 rotor)
4. Thru stud set (10mm) for 3 rotor NZ$175
5. Thru stud set (10mm) for 4 rotor NZ$195 (12mm also available)
6. Dowel set for 3 rotor kit NZ$110
7. Dowel set for 4 rotor kit NZ$130
8. Direct oil feed for 3/4 rotor kits centre housing NZ$90 (2 req for 4rotor)
   this mod is not a necessity only an upgrade for the oiling system.
9. Replacement 20B shaft assy NZ$2100.
10. 20b shaft assy , 3 piece with extra needle bearing assy NZ$2900
11. 13b/12a centre bearing crank kit (includes housing mod) NZ$1800
 
note that the centre housing mod cost is only for the mod ,it does not
include the cost of a std front gear or the housing ,these items esp
the housings vary greatly in price depending on the year/type. They
can be priced on submission of mazda part number.