ProWatercross received considerable feedback regarding details in the recently released 2021 ProWatercross Competition Rulebook. Relative to this feedback we are releasing Revision B of the rulebook which includes updates and clarification on the 2021 rules. Please see the 2021 ProWatercross Competition Rulebook Rev B for complete details.
Updated highlights of the 2021 changes
- Section 27 - Ski 4 Stroke Superjet
- Rule set includes allowances for changes found in section 24 of the rulebook - handlebars, flame arrestors, rideplate...
- Exhaust hose: Added allowance for aftermarket piping between the waterbox and exhaust outlet
- Section 31 - Sport Stock
- Included clarification that stator plate must be OEM
- Included clarification that pump must be OEM
- Section 33 - Sport Open (Previously Blaster GP)
- Hull: Added allowance for stock Seadoo HX hull
- Engine Displacement: Set displacement limit for 2 cylinder engines to 1105cc and 3 cylinder engines to 1140cc when utilizing the Stock HX hull option. All others have a 1300cc limit.
- Exhaust: Set limit of 1 expansion chamber, no multiple expansion chamber exhausts allowed
- Four stroke engines no longer allowed in this class
- Section 36 - Runabout Box Stock / IROC Stock / IROC 1100
- Added the IROC 1100 class
- Pump: Allow pump update for 2019 and older Yamaha SVHO models to 2020 and newer pump
- Valve Springs: Added allowance for modified or aftermarket valve springs on all makes / models
- Valve Guides: Added allowance for aftermarket valve guides, must match OEM shape and size
- Section 41 - IROC GP
- Hull: Aftermarket hulls allowed but must conform to shape, weight and dimension restrictions
- Engine Displacement: Set maximum displacement to 1100cc
- Engine block: Block must be from an OEM IROC watercraft
- Glossary of terms
- IROC : Added Yamaha EXR to the list of IROC models
- IROC Stock: Class for the Seadoo Spark and Yamaha EX models
- IROC 1100: Class for the Yamaha EXR. Runabout Limited 800cc models may also compete in this class
