IJSBA is pleased to announce an update to the class list for the 2018 Blowsion World Finals.  Juniors 10-12 Ski Challenge and Runabout 1100 Open have been added as confirmed classes.  Contingent classes remain.  Please see the complete contingent and confirmed class list below:





The following classes are still contingent and require 12 completed entries by 11:59 PM, PST, on September 4:

Runabout Naturally Aspirated Limited

Runabout Naturally Aspirated Open

Women's Runabout 1100 Stock

Amateur Runabout Stock

To enter any of the above classes please download this entry form, and complete it, with payment, and email it to info@ijsba.com:  SpecialEntryForm


The following classes are confirmed:

Pro Classes

Pro Ski Modified (Sunday Class)

Pro Runabout OPEN (Saturday Class)

Pro Runabout Superstock 

Pro Freestyle  

Pro Am Classes

GP Ski  (Saturday Class)

GP Runabout (Sunday Class)

Runabout Stock

Runabout Naturally Aspirated Stock

Runabout 1100 Superstock  (800cc Maximum for Two Stroke, 1100cc Maximum for Four Stroke)

Ski Stock (2017-2018 Kawasaki SX-R is permitted without a restrictor plate)

Womens’ Ski (2017-2018 Kawasaki SX-R is permitted to Stock Class Specifications.  All else Mod Lites)

Ski Lites

Ski Mod Lites

Runabout Limited

Runabout Endurance Sprint Open

Expert Classes

Expert Ski Modified 

Expert Ski Stock 

Expert Runabout Superstock

Expert Veteran’s Runabout (Limited Class Rules)

Amateur Classes

Amateur Freestyle 

Amateur Ski GP 

Amateur Ski Lites 

Amateur Ski Mod Lites 

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

Amateur Veterans Ski GP  

Amateur Runabout 1100 Superstock (See Open Class Rules, 800 CC Limit For Two Stroke)

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 (Sea-Doo Spark Only)

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

Novice Classes

Novice Ski Stock 

Novice Ski Limited

Novice Runabout Stock

Novice Runabout Naturally Aspirated Stock

Junior Classes

Junior Ski 10-12 Stock (2017-2018 Kawasaki SX-R Allowed only with IJSBA approved restrictor plate)

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

Junior Ski 10-12 Lites Challenge (Slalom and Closed Course)

Junior Ski 13-15 Stock (2017-2018 Kawasaki SX-R Allowed only with IJSBA approved restrictor plate)

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

Junior Ski 13-15 Mod Lites


Other Classes Open To All Skill Level

Runabout 1100 Open

Sport GP

Sport Spec 

Classic Ski Two Stroke Limited  (Limited Class Rules, Two Stroke Only)

Master’s Ski GP  (2017-2018 Kawasaki SX-R is not allowed in this class.  No displacement above 1300cc.  Forced induction Ski are limited to 900cc)

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)

Ski Endurance Sprint (2017-2018 Kawasaki SX-R Allowed to Stock Class Specifications all else GP Rules Apply)


Ski Modified

Runabout Open

Sport GP

Four Stroke Ski Stock