IJSBA is pleased to release the draft displacement guide which will appear in the 2016 Rule Book in the appendix section. These displacement guidelines have not been changed from 2015 but are now more organized and easier to access. Please send any questions, comments, or requests for clarification to IJSBA by emailing: info@ijsba.com.
PWC Competition Displacement Guide
Runabout Categories
As furnished by the manufacturer to be homologated:
785cc if powered by a two stroke engine in 800cc classes
1100cc if powered by a naturally aspirated four stroke engine in 800cc classes
2000cc if powered by a four stroke engine in classes designated above 800cc or designated as a Four Stroke Class, or as a default class
Runabout Stock
800cc if powered by a two stroke engine for 800 classes.
1100cc if powered by a naturally aspirated four stroke engine for 800 classes.
2000cc if powered by a four stroke engine (categories may distinguish between naturally aspirated and forced induction).
Runabout Rec Lites
All units must be naturally aspirated and come, from the manufacturer, at a price point of less than $8,500USD, MSRP, and must conform to the weight limits below.
735cc if powered by a two stroke engine (organizers are not required to offer a two stroke option).
1000cc if powered by a naturally aspirated four stroke engine.
1100cc if powered by a naturally aspirated four stroke engine when the unit weighs a minimum of 750 lbs as furnished by the manufacturer.
Runabout Limited
800cc if powered by a two stroke engine for 800 classes.
1100cc if powered by a naturally aspirated four stroke engine for 800 classes.
2000cc if powered by a four stroke engine (categories may distinguish between naturally aspirated and forced induction).
Runabout Open (Superstock)
800cc if powered by a two stroke engine for 800 classes.
1100cc if powered by a naturally aspirated four stroke engine for 800 classes.
2000cc if powered by a four stroke engine (categories may distinguish between naturally aspirated and forced induction).
Ski Categories
As furnished by the manufacturer to be homologated:
785cc if powered by a two stroke engine
1100cc if powered by a naturally aspirated four stroke engine
800cc if powered by a four stroke engine with forced induction
Ski Lites
All units must be naturally aspirated and come, from the manufacturer, producing 85 horsepower or less.
850cc if powered by a two stroke engine
1100cc if powered by a naturally aspirated four stroke engine
Ski Limited
850cc if powered by a two stroke engine
1100cc if powered by a naturally aspirated four stroke engine
800cc if powered by a four stroke engine with forced induction
Ski Modified (GP)
1300cc if powered by a two stroke engine
1500cc if powered by a naturally aspirated four stroke engine
900cc if powered by a four stroke engine with forced induction
Freestyle
900 CC is the default displacement for Amateur Classes
1200cc is the default displacement for Pro Classes
Sport Classes
Sport Spec
OEM displacement plus 1.0mm overbore for two stroke engines, no other engines are permitted
Sport Modified/GP
1300cc if powered by a two stroke engine
1500cc if powered by a naturally aspirated four stroke engine
900cc if powered by a four stroke engine with forced induction
Vintage Classes
Vintage Ski
550CC by default. May be restricted by displacement (i.e Vintage Ski 550, Vintage Ski 650, etc.)
Vintage X2
800CC
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