IJSBA is pleased to release what appears to be the finalized list of classes for the 2019 IJSBA Thai Airways World Finals.  There are some class modifications and reversions based on the need to align with the classes for the inaugural World Series.  IJSBA will issue a follow up release with a description matrix.  Please note that Ski GP and Runabout GP are now Pro designation classes.  Please direct any questions to info@ijsba.com.  Please note the original posting of this release accidentally omitted Women's Runabout 1100 Stock which is offered this year.





Pro Classes

Pro Ski GP (Saturday Class)

Pro Runabout GP (Saturday Class)

Pro Freestyle  

Pro Am Classes

Ski Superstock  (Sunday Class Class)

Runabout Superstock (Sunday Class restrictor plates planned for 2020)

Runabout Stock

Runabout Naturally Aspirated Stock

Runabout 1100 Open

Ski Stock (1500 Kawasaki SX-R without a restrictor plate)

Womens’ Ski (1500 Kawasaki SX-R as Stock Class without a restrictor plate and Ski Mod Lites)

Ski Mod Lites  (Juniors 14 and over with sufficient experience may petition to participate)

Ski Lites

Runabout Limited  (Restrictor Plates in 2020)

Veterans Runabout  (Restrictor Plates in 2020)

Endurance Runabout Open

Expert Classes

Expert Ski Superstock 

Expert Ski Stock 

Expert Runabout Superstock  (Restrictor Plates In 2020)

Amateur Classes

Amateur Freestyle 

Amateur Ski GP 

Amateur Ski Lites 

Amateur Veteran’s Ski Stock (Two Stroke Limited Legal Ski allowed- this year only).

Amateur Veterans Ski GP  

Amateur Runabout 1100 Open

Amateur Runabout 1100 Limited (Up To 1100cc Normally Aspirated Four Stroke, 800 CC limit for Two Stroke)

Amateur Runabout 1100 Stock (Four Stroke Powered Runabout Only: Sea-Doo Spark; Yamaha EX)

Amateur Runabout Rec Lites

Amateur Women’s Ski Lites  (All participants who hold an Expert License, All participants who have had a World Finals podium finish in Novice Women’s Ski, and participants who have participated in Pro Am Women’s Ski must petition IJSBA for eligibility in this class).

Amateur Runabout Limited  (Restrictor Plates In 2020)

Veterans Ski Lites

Novice Classes

Novice Ski Stock  (1500 Kawasaki SX-R without restrictor plate)

Novice Ski Mod Lites

Novice Runabout Stock

Junior Classes

Junior Ski 10-12 Stock (2017 Kawasaki SX-R Allowed only with IJSBA approved restrictor plate)

Junior Ski 10-12 Lites (Stock Rules 2 Stroke Only)

Junior Ski 13-15 Stock (2017 Kawasaki SX-R Allowed only with IJSBA approved restrictor plate)

Junior Ski 13-15 Lites (Stock Rules 2 Stroke Only)


Other Classes Open To All Skill Level

Sport GP (Sunday Class)

Sport Spec (All Skill Level, Pro Ranked Competitors Must Petition To Participate)

Blaster GP  (All Skill Level, Previous Podium Finishers Must Petition To Participate)

Master’s Ski GP  (2017 Kawasaki SX-R is not allowed in this class.  No displacement above 1300cc.  Forced induction Ski are limited to 950cc)

Master’s Ski Stock (2017 Kawasaki SX-R allowed to Stock Class specifications Only, Two Stroke Ski allowed to Limited Class specifications- this year only)

Vintage Ski (Two Moto’s- Combined Score for Overall)

Vintage X2 (Two Moto’s- Combined Score for Overall)

Women’s Runabout (Limited Class Rules For Two Stoke, Stock Rules For Four Stroke Plus Aftermarket Seat Allowance)

Women's Runabout 1100 Stock (accidentally omitted in the first posting)

Ski Endurance  Sprint (2017 Kawasaki SX-R Allowed to Stock Class Specifications)


Ski Modified

Runabout Open

Sport GP

Four Stroke Ski