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Gear Ratio Chart
This is the gearing for the permanent Portland Kart track, These are also Suitable for a starting piont for the street Circuit. This gearing is based on weights and tyres used for the 2001 Season.

Midgets                                     13:69 - 13:73

Rookies                                     13:69 - 13:73

Junior National Light                12:75

Junior National Heavy              12:76

Senior National Light                12:75

Senior National Medium           12:76

Senior National Heavy              12:78

Clubman Light                          10:80

Clubman Medium                     10:82

Clubman Heavy                        10:82

Clubman Super Heavy             10:84

Rotax Light                              12:78

Rotax Heavy                            12:80 - 12:82

Formula Australia Light           10:78

Formula Australia Heavy         10:80

RESA                                        TBN