

Motul Honda Cup Series
Class Groupings
The Honda Cup Series includes a number of classes in two groupings. These class groups then race for the Honda Cup Open Class and the Honda Cup Production Class championships within the series.

Honda Cup Open Class
The Open class includes H2, H3, H4 and H5 class variants. H2, H3 and H5 have very open modification rules. H4 is based on the standard K24 engine and head. Race weights are set to level out the field.
H2 - B18C - Open / Modified
H3 - K20A - Open / Modified
H4 - K24A - Std Engine & Head
H5 - K24A - Open / Modified
HU - - Experimental

Honda Cup Production Class
The Production class includes N1, N2 and the new introduced N3 class variants. N3 class is for the newer factory turbo models, N2 class is for 'modern chassis' starting from year 2000. N1 class is for the 'classic chassis' prior to 2000.
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N1 - EF, DA, EG, EK - B16A Std Engine & Head
N1 - DC2, DC2R - B18C Std Engine & Head
N2 - DC5, EP3, CL7 - K20A Std Engine & Head
N2 - CL9 - K24A Std Engine & Head
N3 - FK2, FK8, FL5 - K20C Std Engine & Head















