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    Moderator shawn alladio's Avatar
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    2008 IJSBA Rule Book Draft

    2008 IJSBA Rule Book Draft





    2008 IJSBA Rule Book Draft

    (February 6, 200 - This information is to serve as a general summary of the changes for 2008. The text used in the 2008 Official Competition Rulebook will be binding.
    Dear Personal Watercraft Racing Community,
    The IJSBA is pleased to present the draft of the 2008 IJSBA Rule Book. The rulebook has been sent to print with only the pages which have been modified left unprinted. The book shall be completed and shipped next week. If you notice any changes or believe that language should be modified to be clearer then please immediately report it to [email protected].

    The following is the list of changes, in order, to the IJSBA Rule Book from the 2007 version:

    5.1.3 For two-stroke watercraft to be homologated for competition in the Ski divisions, the watercraft must not exceed 785cc in stock configuration when furnished by the manufacturer. Unless stated by the class designation (ie Novice Ski 750 Limited) the maximum displacement of a two-stroke shall be 850cc in all Stock or Limited Classes. Normally aspirated four-stroke Ski PWC are limited to 1100cc as furnished by the manufacturer and the maximum displacement shall be the OEM displacement plus 1mm overbore on all cylinders. The maximum displacement that may be achieved by any two stroke Supercharged or Turbocharged Ski PWC is limited to 800cc maximum.

    5.1.4 For two-stroke watercraft to be homologated for competition in the Runabout division, the watercraft must not exceed 1300cc in stock configuration when furnished by the manufacturer. Unless stated by the class designation (ie Novice Runabout 800 Limited), the maximum displacement of a two-stroke shall be 1200cc or OEM plus 1mm overbore on all cylinders (whichever is greater). Four-stroke Ski PWC are limited to 1600cc as furnished by the manufacturer. If a Runabout, as furnished by the manufacturer, exceeds 1600cc then the maximum displacement shall be the OEM displacement plus 1mm overbore on all cylinders. The maximum displacement that may be achieved by any Runabout PWC is 2000cc.

    5.5.3 In addition to four-stroke-specific class, four-stroke watercraft may be classified as compatible in two-stroke classes, provided the following:

    1) Normally aspirated and turbocharged/supercharged Stock-class four-stroke watercraft may compete in Stock, Limited, Open and Modified two-stroke classes.

    2) Normally aspirated Open-class four-stroke watercraft may compete in Limited, Open and Modified two-stroke classes.

    3) Four-strokes up to 1100cc may compete in 850cc two-stroke classes;
    4) Four-strokes up to 2000cc may compete in 1300cc two-stroke classes.

    5) Ski division four-stroke watercraft up to 1100cc, which are normally aspirated, may compete in 800cc two- stroke classes. Ski division four-stoke watercraft which are supercharged or turbocharged may not exceed 800cc.

    5.5.4 Watercraft competing in Four-Stroke Runabout must conform to the following criteria:

    1) Dry weight must be greater than 250kg (550 lb.) for 1100cc classes;
    2) Dry weight must be greater than 272kg (600 lb.) for classes exceeding 1100cc;

    6.1 STOCK CLASS COMPETITION
    Intended to promote interest in stock personal watercraft competition and to enable individuals to become active competitors with relatively modest investment and maintenance costs. Watercraft competing in these classes must conform to the specifications which follow. Note: classes may be offered that have greater restrictions than these Stock Class Provisions. Such class offerings must be named to differentiate the applicable rules (ie Novice Ski Showroom Stock, etc.)

    LITES ADDENDUM: LITES is a special designation applied to Stock Classes to implement a horsepower limit. Ski Lites are Stock Class Ski PWC with a maximum of 85 Horsepower as furnished by the manufacturer. Runabout Lites are Stock Class Runabout PWC with a maximum of 220 Horsepower as furnished by the manufacturer. The IJSBA will publish an official list of OEM Horsepower for all homologated models.

    6.3.1 Engines may be bored. Replacement piston assemblies may be used provided the original port timing, compression ratio, dome profile, skirt length and shape and type of material are not changed. Non-conforming pistons (ie skirt shape that is not an exact replica of the OEM piston) may be approved by the IJSBA but such approval must be obtained in writing. Replacement piston assemblies must weigh within ±25.00% of original equipment. Engine displacement must not exceed class designation (e.g., 550cc in 550 Stock, 850cc in 850 Stock, etc.) unless otherwise noted. Chamfering of cylinder ports must not exceed 1.00mm (0.04 in.) at a 30 degree maximum angle. (See diagram in Appendix.).

    6.4.8 When Four-Stroke and Two-Stroke Ski PWC are combined in the same Stock Class then the IJSBA may require that those Four-Stroke Ski PWC which are not normally aspirated (Turbocharged or Supercharged) shall be affixed with an IJSBA approved boost regulator. The boost regulator shall be set to release any boost pressure above 110% of the stock specifications. The IJSBA shall publish the official interpretation of the stock specifications. HSR-Benelli boost pressure is limited to 7.7psi in Stock Class Competition.

    7.8 FOUR –STROKE LIMITED Provisions
    7.8.1 The former Four Stroke Limited Rules have been integrated into the Limited Class for RUNABOUTS ONLY. Supercharged and Turbocharged Ski Division PWC must adhere to Stock Class Rules in all Limited Classes where Two Stroke and Four Stroke PWC are combined. The regulated boost pressure ( see Rule 6.4.) shall be set to release any boost pressure above 200% of the stock specifications. The IJSBA shall publish the official interpretation of the stock specifications. The HSR-Benelli S4 boost pressure is limited to 14 psi in Limited Class Competition.

    7.8.2 ENGINE- FOUR STROKE (RUNABOUTS ONLY)

    7.8.2.1 Engines may be bored. Replacement piston assemblies may be used provided the original port timing, compression ratio, dome profile, skirt length and shape and type of material are not changed. Replacement piston assemblies must weigh within ±25.00% of original equipment. Engine displacement must not exceed class.

    7.8.2.2 Crankshaft may be rebuilt/replaced provided by the following: Counterweights and material type must maintain the shape and dimensions as provided by the manufacturer. Stroke and rod lengths may not be changed. Counterweights may be deburred to remove only casting flaws, no other machining or knife edging of counterweights are allowed. Rod journals must maintain their OEM diameters/dimensions, Main journals must maintain there OEM diameters/dimensions. Cross drilling of crankshaft to improve oil flow or redirection is allowed. Replacement bearing shells are allowed provided the following: ( max. allowable undersized bearing is .060 or 1.5mm). Total weight of the crankshaft assembly must be within +/- 5.00% of original equipment. Damaged rod or main journals may be welded and machined to their OEM dimensions or within the allowable bearing sizes.

    7.8.2.3 Repairs to cracked or punctured crankcases may be made provided only one damaged area affecting one cylinder bank has been repaired. Crankcase drain and cable may be removed and plugged. No other modifications or repairs are allowed.

    7.8.2.4 External modifications to the engine finish (e.g., plating, polishing and/or painting) are allowed for cosmetic purposes only.

    7.8.2.5 No internal modifications of any kind, including grinding, surfacing, polishing, machining, shot peening, etc., will be allowed on any engine components.

    7.8.2.6 Aftermarket cooling lines and water bypass systems may be used. Additional cooling supply lines and fittings may be added to the pump. Bypass fittings may be modified, aftermarket and/or relocated but must be directed downward and/or rearward so as not to create a hazard for other riders. Any valves used within the entire cooling system must be of the fixed type or automatic (e.g., thermostats, pressure regulators, solenoids, etc.). Manually controlled devices (by any means of actuation) that alter the flow of cooling water during operation are not allowed. Cooling system flush kits are allowed.

    7.8.2.7 Replacement starter motor and bendix may be used.

    7.8.2.8 Replacement engine mounts may be used.

    7.8.2.9 Replacement of general maintenance parts (e.g., gaskets, seals, spark plugs, spark plug wires, spark plug caps, wiring, water hoses, fuel lines, clamps and fasteners) shall not be restricted to original equipment providing the following:

    1) Replacement gaskets may be used but must be of the same type (e.g., sheet, o-ring, etc.) and thickness as their OEM counterparts
    2) Fasteners (e.g., bolts, nuts and washers) may not be substituted with titanium pieces unless originally equipped. Fasteners may integrate locking mechanisms.

    7.8.2.10 Modifications in this rule are not allowed to be made on a PWC that has been modified subject to rule 7.8.3.1. Camshafts may be modified or aftermarket.

    7.8.2.11 Modifications in this rule are not allowed to be made on a PWC that has been modified subject to rule 7.8.3.1. Valves may be modified or aftermarket. Valve seats may be modified. Springs may be modified or aftermarket. Pushrods may be modified or aftermarket. Replacement valves, pushrods, and seats may not be titanium unless originally equipped.

    7.8.3 AIR/FUEL DELIVERY- FOUR STROKE (RUNABOUTS ONLY)

    7.8.3.1 Modifications in this rule are not allowed to be made on a PWC that has been modified subject to rule 7.8.2.10 or 7.8.2.11. Turbocharger impeller or supercharger impeller may be modified or aftermarket. The impeller housing must remain stock as supplied by the manufacturer. Intercoolers may be modified or aftermarket. Intercooler heat exchange surface area may not be increased by more than 20%.

    7.8.3.2 The entire fuel system is a closed system. The watercraft must not vent or spill fuel at any attitude with or without the engine running. Original equipment fuel tank, fuel filler and relief valve must be used and cannot be modified. The fuel pickup, fuel filter and fuel petcock assembly may be removed and/or aftermarket parts may be used. Additional fuel filters may be used and fuel cell foam may be added to the original equipment fuel tank. Fuel tank filler cap may be modified or aftermarket provided a hazard is not created.

    7.8.3.4 A fuel pressure regulator may be added and/or modified for safety purposes.

    7.8.3.5 Throttle bodies must remain stock as supplied by the manufacturer. No changing of throttle plate angles and/or modifications to the throttle body housing. No phenolic or aluminum spacers are allowed behind the throttle body.

    7.8.4 AIR/FUEL DELIVERY- FOUR STROKE (SKI ONLY)

    7.8.4.1 Intercoolers may be modified or aftermarket. Intercooler heat exchange surface area may not be increased by more than 25%. However, if any Limited Class Ski is equipped with a modified or aftermarket intercooler then that PWC shall have the boost regulator set to release any boost pressure above 110% of the stock specifications. The IJSBA shall publish the official interpretation of the stock specifications. HSR-Benelli boost pressure is limited to 7.7psi in Stock Class Competition.

    8.1 OPEN CLASS COMPETITION
    Intended to promote interest in personal watercraft competition with a higher degree of modification. Watercraft competing in this class must conform to the specifications which follow.

    SUPERSTOCK ADDENDUM: If a class is designated as Superstock then Open Class rules shall apply with the exception of 8.2.2 (aftermarket hulls) and 8.3.5.a (aftermarket cylinders).

    DISPLACEMENT ADDENDUM: All Normally Aspirated Ski PWC shall be allowed a maximum displacement of 1100cc or OEM displacement plus 1mm overbore on all cylinders (whichever is greater). Any Ski PWC which is supercharged or turbocharged shall be limited to a maximum displacement of 800cc or OEM displacement plus 1mm overbore on all cylinders (whichever is greater).

    8.3.5.a SKI DIVISION ONLY: The Cylinder of a two-stroke engine may be modified or aftermarket.

    9.1 MODIFIED CLASS COMPETITION
    Competitors in this class are allowed modifications to gain maximum machine and engine performance. Watercraft competing in this class must conform to the specifications which follow.

    FREESTYLE ADDENDUM: Amateur and Pro Freestyle classes are allowed identical modifications with the exception that Amateur Freestyle Competitors may compete on PWC with a maximum displacement of 900cc while Pro Freestyle Competitors may compete on PWC with a maximum displacement of 1200cc.

    10.1.2 As a general policy, the IJSBA requires that riders be 16 years old or older for all competition classes except Junior Classes (13-15 Runabout Limited,10-12 year old Ski Stock and Junior 13-15 year old Ski Stock and Limited). Boating laws in some countries require higher age minimums or allow lower age limits. Refer to Section 23 and/or contact the local IJSBA International Affiliate for information about specific age requirements in each country. A birth certificate and/or passport shall be presented to substantiate age.

    12.1.3 The maximum number of watercraft per closed-course heat should not exceed the following:

    SKI SPORT RUNABOUT
    CLASS DIVISION DIVISION DIVISION
    JUNIOR 12 (14*) 12 (14*) 8 (12*)
    BEGINNER 12 (14*) 12 (14*) 10 (14*)
    NOVICE 14 (16*) 12 (16*) 12 (16*)
    EXPERT 16 (18*) 14 (18*) 14 (18*)
    PRO 18 (20*) 16 (20*) 16 (20*)

    If the race is restarted, riders not having previously started in that race will not be allowed to enter with the restart. Exceptions to this rule must be clearly stated at the Rider’s Meeting or be printed in writing and published in reasonable advance of the event
    15.4.5

    Missed Buoys: A rider failing to negotiate a buoy or missing a marker buoy will be penalized for each missed buoy unless he/she completes the proper method for correcting a missed buoy.
    The preferred method for correcting a missed buoy is to have a strategically placed buoy on the course which serves as a “penalty buoy.” If a rider fails to negotiate, or misses, a buoy then that rider must properly negotiate the penalty buoy in its place. The buoy should be placed between the merge section of an option course and the finish line buoys. The buoy should be placed in a position to cause the offending rider to markedly depart from the course. Riders who cut the course may not make up any missed buoy by negotiating the penalty buoy.
    A rider circling back against traffic to renegotiate a buoy is not the preferred method for correcting a missed buoy.

    20.2.3 When a protest is made against a boat’s eligibility, the protester must post with the Race Director a minimum cash bond of $150 U.S. to cover the costs of any disassembly, inspection and assembly required, regardless if disassembly is required. Bonds may be tailored to reflect the extent of the work involved in disassembly and reassembly for the inspection. Bond Fees above $150 must be announced at the Riders Meeting or published, in writing, prior to the event. No Bond may exceed $500 US.
    ###


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    Moderator shawn alladio's Avatar
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    IJSBA 2008 World Finals dates




    Written by K38rescue ondocument.write(localTime('Mar 15, 2008 17:57 GMT')) Mar-15-08 10:57am


    January 16,2008

    The IJSBA is pleased to confirm the dates for the 2008 World Finals. The event shall be held from October 4-12, 2008.
    The event will again be admission free and there shall be no increase in any of the entry fees. The tentative event schedule is as follows:
    • <LI _extended="true">October 4-5: Check in and Pits Open <LI _extended="true">October 6: Amateur Practice <LI _extended="true">October 7-10: Amateur and Expert Racing <LI _extended="true">October 9-11: Expert and Pro Am Racing <LI _extended="true">October 10-11: GP Classes, Trade Show Opens
    • October 11-12: Pro and Pro Am Racing, Slalom, Trade Show
    A tentative comprehensive schedule and lodging information will be available soon. If there are any immediate questions, please call the IJSBA at: (714)-751-8695 or email: [email protected].

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