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Rolle,
Ta och läs ISJBA´s regelbok så framgår det tydligt vad du får göra och inte.
Du har rätt angående STOCK-klassen men för
OPEN klassen så är det 100% ok (Den är liberal)
Regelboken finns på våran hemsida ifal du inte har den.
Längst ned på sidan finns den att tanka hem, STOCK är 6.0 och OPEN är 8.0 paragraferna
Eller läs om hela OPEN klassen här nedan
www.ribextremeracing.com/startracing.php
Mvh Niklas
RIB EXTREME RACING
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).
8.1.1 All watercraft must remain strictly stock, except where rules allow or require substitutions or modifications.
Changes or modifications not listed here are not permitted. Some original equipment components may not comply
with IJSBA rules. Hull Identification Numbers must be displayed as furnished by the manufacturer.
NOTE: When rules permit or require equipment to be installed, replaced, altered or fabricated, it is the sole
responsibility of the rider to select components, materials and/or fabricate the same so that the watercraft
operates safely in competition.
8.1.2 Original equipment parts may be updated or backdated to original equipment parts of the same model. The part must be a
bolt-on requiring no modifications to that part or any other parts except where rules allow substitutions or modifications.
(Refer to Model Homologation listing on page 10-11.)
Note: Pre-1996 Yamaha SuperJet may update to 1996 and newer engine components. Kawasaki JS750SX and SXi may
update to SXi Pro engine components.
8.1.3 Sound level shall not exceed 100 dB (a) at 22.86m (75 ft.). See Section 19.5 (pg. 73). A sound level of 86 dB may be
enforced so long as the promoter notifies participants at least 14 days prior to the event.
8.1.4 Engine fuel must consist of gasoline meeting the criteria defined in Section 19.4.3 (pg. 73).
8.1.5 At all times, the watercraft must weigh no less than 10 percent under the watercraft’s original dry weight as determined by
the IJSBA, providing the following:
• Includes fuel and oil.
• Includes the water in the waterbox, so long as the waterbox is not deemed to be out of ordinary in volume.
• Includes the battery.
• All reasonable amount of water must be removed from all compartments.
Ballast weight may be added prior to competition to meet the required weight limit (see 8.2.16).
8.2 HULL
8.2.1 All watercraft must have a flexible tow loop attached to the bow. The tow loop should be made of a flexible material (e.g.,
nylon strap, rope, etc.) so as not to create a hazard. Tow hooks, which protrude beyond the plane of the hull, must be
removed.
8.2.2 Aftermarket hulls may be used, on watercraft homologated in numbers of 500 or higher, in classes which carry Expert and
Pro designations. Top decks must be the original OEM top deck as supplied by the manufacturer. Hull and deck repairs
may be made. However, these repairs must not alter the standard configuration of the top deck by more than 2.00mm
(0.08 in.). Hull, bulkhead and deck may be internally reinforced. Fasteners may be installed through the hull, bulkhead and
deck for the purposes of securing components to interior surfaces, provided a hazard is not created. Other than for the
use of fasteners, the bulkhead may not be modified. Glue squeeze-out may be removed from the hull.
8.2.3 All watercraft may be equipped with a maximum of two sponsons. Original equipment sponsons may be modified,
aftermarket, repositioned or removed. Overall length of each sponson shall not exceed 91.45cm (36.00 in.). Sponsons
shall not protrude from the side of the hull by more than 100.00mm (3.94 in.) when measured in a level horizontal plane.
The vertical channel created by the underside of the sponson shall not exceed 63.5mm (2.50 in.). No part of the sponson
shall extend downward below the point at which the side of the hull intersects the bottom surface of the hull by more than
63.5mm (2.50 in.). Aftermarket or modified sponsons must exceed 6mm (0.24 in.) in thickness. All leading edges must be
radiused so as not to create a hazard. Sponsons may not be attached to the planing surfaces of the hull. Fins, rudders,
skegs and other appendages that may create a hazard will not be allowed. (See diagrams in Appendix.)
Ski Division Only: Sponsons may be attached to the inside of the bond flange, but no part of the sponson may extend
more than 38.00mm (1.50 in.) below the lower part of the bond flange (bumper removed). Sponsons attached to the inside
of the bond flange shall not protrude outside the bond flange (bumper removed) when measured in a level horizontal
plane.
The decision of the Technical Director and/or Race Director regarding modifications will be final. Any question regarding
the legality of modifications should be directed to the IJSBA or IJSBA affiliate prior to use in competition.
8.2.4 Intake grate may be modified or aftermarket. Intake grate is required and must be the full-length type with at least one bar
running parallel to the drive shaft. Grates may not extend more than 12.00mm (0.47 in.) below the flat plane of the pump
intake area. All leading edges must be radiused so as not to create a hazard.
8.2.5 Pump cover plate may be modified or aftermarket. An extension may be added to the rear of the pump cover plate but
shall not exceed the width of the original equipment plate. Modified and aftermarket plates must not extend more than
100.00mm (3.94 in.) beyond the end of the original equipment plate for Ski and Sport Division or 177.80mm (7.00 in.) for
Runabout Divisions. The sides of the extension must be connected to the radiused portion of the pump plate so as not
to create a hazard. (See diagram in Appendix.) Fins, rudders, skegs and other appendages that may create a hazard will
not be allowed.
8.2.6 Aftermarket trim tabs, either fixed, automatic and/or rider controlled, may be used. Original equipment trim plates that are
detachable from the hull may be removed or replaced when installing aftermarket trim tabs. Trim tabs cannot exceed the
width of the planing surface or extend rearward more than 100mm (3.94 in.) beyond the end of the original planing
surface. All hull extensions mounted on the hull’s transom will be considered as a trim tab. All edges must be radiused so
as not to create a hazard. Fins, skegs, rudders and other appendages that may create a hazard are not allowed.
8.2.7 Replacement bumpers may be used provided a hazard is not created.
8.2.8 A soft, flexible water-spray deflector may be attached to the hull sides or to the bond flange provided a hazard is not
created. No part of the deflector may extend beyond the perimeter of the original equipment bumper or side moldings as
measured by a plumb line.
8.2.9 Handlebar, throttle, throttle cable, and grips may be modified or aftermarket. Handlebar cover may be modified or
removed. Aftermarket switches and switch housings may be used. Steering shaft, steering shaft holder and handlebar
holder may be aftermarket. The handlebar must be padded at the mounting bracket or, if it has a crossbar, the crossbar
must be padded.
Aftermarket steering cables are allowed.
8.2.10 Ski Division Only: Handlepole (and mounting bracket) may be modified or aftermarket provided it functions as originally
designed. Handlepole attaching point may be reinforced.
8.2.11 Sport and Runabout Division Only: Seat assembly may be modified or aftermarket. Seat height may be changed.
8.2.12 Padding and/or mat kits may be added and custom painting is allowed. The surface finish of any metal component outside
the hull area above the bond flange may be polished, shot peened or painted.
8.2.13 Original bilge pump may be modified or disconnected. Aftermarket bilge draining systems that do not create a hazard are
allowed.
8.2.14 Engine compartment foam may be removed, modified or aftermarket. Only floatation foam within the engine compartment
may be removed. Only foam that can be removed without modification to any other part or parts, except where rules allow
the parts to be modified, is allowed. Parts may not be relocated based on the removal of the foam. The hull’s inner liner or
deck may not be cut or modified to remove foam. Removal of foam between layers of the hull and/or deck is not allowed.
8.2.15 Storage covers, hatches, instrument cowlings and engine covers may be modified or aftermarket provided a hazard is not
created and the OEM appearance is maintained. Additional engine compartment ventilation is allowed. Original equipment
vents may be shielded or plugged. Handles, drop-in type storage buckets and bolt-on type mirrors may be modified, aftermarket
or removed provided a hazard is not created.
8.2.16 Ballast weight may be added within the normally exposed areas of the hull to alter the handling of the watercraft provided
a hazard is not created. Only weight consisting of constant mass (i.e., water or other fluid is not allowed) that does not
require the modification or relocation of any parts will be allowed unless such modification or relocation is specified by
other rules.
8.3 ENGINE — TWO-STROKE
8.3.1 Engines may be bored. Aftermarket piston assemblies are allowed. Engine displacement must not exceed class
designation (e.g., 800cc in 800 Superstock, 1600 Open, etc.). The number, type, and placement of rings on piston may be
changed.
8.3.2 Original equipment crankcase must be used. Internal modifications to the fuel, oil and/or water-exposed surfaces are
allowed. Filler material may be added to hollow pockets in the base gasket areas. Base gasket and intake surfaces may
be machined. Additional carburetor pulse line fittings may be installed. Bearing and seal surfaces may not be modified.
Crankcase drain system may be removed and plugged. Repairs to cracked or punctured crankcases may be made
provided only one damaged area affecting one cylinder bank has been repaired. No other external modifications or
external repairs are allowed.
8.3.3 Crankshaft assembly may be modified or aftermarket. Stroke and rod length may be changed.
8.3.4 Engine balancing assemblies may be modified, aftermarket, or removed.
8.3.5 Cylinders may be interchanged between homologated watercraft of the same manufacturer subject to restrictions
announced by the IJSBA. Any modifications to the cylinder or crankcase must be approved, in writing, by the IJSBA.
Base gasket, head gasket and exhaust manifold gasket surfaces may be machined. Port heights, widths and shapes may
be changed. Ports may be added or deleted from cylinder. Cylinders may be machined to accept aftermarket cylinder
liners. Epoxy-type filler material may be added to hollow pockets in the base gasket areas and in the port area. Repairs to
cracked or damaged cylinders may be made provided only one damaged area affecting one cylinder bank has been
repaired. Cylinders may be machined to accept girdle-system cylinder heads. Water-cooling fittings may be added to
cylinder. Exhaust power valve components and means of actuation may be modified or aftermarket.
8.3.5.a SKI DIVISION ONLY: Cylinder may be modified or aftermarket.
8.3.6 External modifications to the engine finish (e.g., plating, polishing and/or painting) are allowed for cosmetic purposes only.
8.3.7 Cylinder head may be modified or aftermarket.
8.3.8 Engine gaskets may be modified or aftermarket.
8.3.9 Exhaust system (i.e., manifold, head pipe, expansion chamber, waterbox, muffler(s), etc.) may be modified or aftermarket.
Through-hull exhaust may be modified or aftermarket, providing a hazard is not created. Exit location of the exhaust
gases may be relocated to the transom below the bond flange. No tuned portion of the exhaust system shall protrude
outside the hull.
8.3.10 Cooling system may be modified or aftermarket. Aftermarket cooling lines and water bypass systems may be used.
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.
8.3.11 Replacement starter motor and bendix may be used.
8.3.12 Replacement engine mounts may be used.
8.3.13 Oil-injection system may be disconnected or removed.
8.3.14 Replacement of general maintenance parts (e.g., spark plugs, spark plug wires, spark plug caps, wiring, water hoses, fuel
lines, clamps and fasteners) shall not be restricted to original equipment. Stripped threads can be repaired.
8.4 ENGINE — FOUR-STROKE
8.4.1 Original engine block must be used. Internal modifications to the oil and/or water-exposed surfaces will be allowed. The
head gasket surface of the cylinder block may be machined.
8.4.2 The original cylinder head casting must be used. Intake and exhaust runners may be modified. Material may be added to
the runners. Intake and exhaust ports may be modified. Port diameters and shapes may be changed. Combustion
chambers may be modified. Material may be added to the combustion chamber. The original number of intake and
exhaust valves must be the same as original. Repairs to the cylinder head affecting one cylinder bank are allowed. The
head gasket surface may be machined.
8.4.3 Aftermarket valvestrain components are allowed, providing the original method of activation is maintained (e.g., if
originally activated by a camshaft, they may not converted to solenoid activation). Valves may be shimmed with OEM or
aftermarket shims. Valve springs may be modified or aftermarket. Camshaft(s) may be aftermarket. The number of
camshafts must be the same as original. Original bearing type and dimensions must be used. Cam timing may be
changed. Cam gears, tensioners, chain or belt may be modified or aftermarket.
8.4.4 Engines may be bored. Aftermarket piston assemblies are allowed. Engine displacement must not exceed class
designation (e.g., 1100cc in Runabout 1100 Superstock, 1600cc in Runabout Superstock Turbo, etc.).
8.4.5 Crankshaft may be modified or aftermarket. Stroke must remain the same as original. Total weight of the crankshaft must
be within +/-5.00% of original equipment. Replacement bearings or bearing shells are allowed, providing they maintain
their original type and dimensions.
8.4.6 Engine balancing assemblies may be modified, aftermarket, or removed.
8.4.7 Aftermarket connecting rods made of ferrous materials are allowed. Rod length may be changed.
8.4.8 Exhaust system (i.e., manifold, connecting pipes, hoses, muffler(s), etc.) may be modified or aftermarket. Through-hull
exhaust may be modified or aftermarket, providing a hazard is not created. No tuned portion of the exhaust system may
protrude outside of the hull. Exit location of the exhaust gases may be relocated to the transom below the bond flange
8.4.9 Cooling system may be modified or aftermarket. Additional cooling lines may be added. Aftermarket water bypass
systems may be used. Cooling system bypass fittings may be modified or 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 means of actuation) that alter the flow of cooling water during operation are not allowed. Original cooling
system thermostat may be removed, modified or aftermarket. Cooling system flush kits are allowed.
8.4.10 Baffles in oil reservoir may be modified. The addition of baffles in oil reservoir is allowed. Oil pump may be modified or
aftermarket.
8.4.11 Valve cover may be replaced for cosmetic purposes and/or weight reduction only.
8.4.12 Replacement starter motor and bendix may be used.
8.4.13 Replacement engine mounts may be used.
8.4.14 External modifications to the engine finish (e.g., plating, polishing and/or painting) are allowed for cosmetic purposes only.
8.4.15 Replacement of general maintenance parts (e.g., gaskets, seals, spark plug wires, spark plug caps, wiring, water hoses,
fuel lines, fuel filters, oil filters, clamps and fasteners) shall not be restricted to original equipment. Stripped threads may
be repaired. Fasteners may integrate locking mechanisms.
8.5 AIR/FUEL DELIVERY — TWO-STROKE
8.5.1 Carburetor(s) may be modified or aftermarket provided they do not vent or spill fuel at any attitude with or without the
engine running. The number of venturis cannot exceed the number of cylinders. No slide-type carburetors. Aftermarket
primer may be used. Intake manifold assembly may be modified or aftermarket. Aftermarket crankcase pressure operated
fuel pumps may be used.
8.5.2 Modified or aftermarket vapor/air separators must not exceed 2 in. x 6 in., and must have a return line to the fuel tank
open at all times. Additional fuel reservoirs may not be used. Aftermarket or modified electric fuel pumps, not exceeding 4
psi, may be used. When the engine is shut off or stops, the fuel pump must automatically stop. No manually operated
on/off-type fuel pumps are allowed.
8.5.3 Aftermarket fuel-injection systems and components are allowed provided the following regulations are adhered to: Highpressure
fuel hose meeting SAE J30R9 must be used; A.N. threaded-type fittings or equivalent and non-removable,
crimped- type clamps must be used on the high-pressure portion of the system (i.e., hose clamps, tie wraps, etc. are not
allowed); only metal-type fuel filters may be used on the high-pressure portion of the system; all other in-line filters must
be installed on the low-pressure portion of the system. When the engine is shut off or stops, the fuel pump must
automatically stop. No manually operated on/off-type fuel pumps are allowed.
8.5.4 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 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.
8.5.5 Flame arrester(s) which satisfy United States Coast Guard, SAE-J1928 Marine or UL-1111 Marine backfire flame arrester
test standards must be installed. Aftermarket flame arresters satisfying one of these test standards are allowed. Intake
silencer may be removed.
8.5.6 Reed valve assemblies may be modified or aftermarket. Rotary valve may be modified or aftermarket.
8.6 AIR/FUEL DELIVERY — FOUR-STROKE
8.6.1 The original fuel injectors may be modified to increase fuel-flow rate. Aftermarket fuel injectors that increase fuel flow are
allowed provided they must not increase airflow into the combustion chamber. Fuel rail and fuel regulator may be modified
or aftermarket. Additional fuel injectors may be added. Aftermarket fuel pumps are allowed provided that when the engine
is shut off or stops, the fuel pump must automatically stop. No manually operated on/off fuel pumps are allowed. Highpressure
fuel hose meeting SAE J30R9 must be used; only metal-type fuel filters may be used on the high-pressure
portion of the system; all other in-line filters must be installed on the low-pressure portion of the system
8.6.2 Flame arresters that meet USCG, UL-1111 or SAE J-1928 Marine standards must be used. Airflow sensor may be
modified, aftermarket or removed. Ducting between the flame arrestor and throttle body may be modified or aftermarket.
8.6.3 Throttle body may be modified or aftermarket. The number of butterflies may be increased but may not exceed the
number of cylinders. Intake manifold assembly may be modified or aftermarket.
8.6.4 Carburetor(s) may be modified or aftermarket provided they do not vent or spill fuel at any attitude with or without the
engine running. Carburetors may be used in addition to or in place of the fuel-injection system. The number of venturis
cannot exceed the number of cylinders. No slide-type carburetors. Aftermarket primer may be used. Intake manifold
assembly may be modified or aftermarket. Aftermarket air-pulse-pressure operated fuel pumps may be used.
8.7 IGNITION AND ELECTRONICS — TWO-STROKE/FOUR-STROKE
8.7.1 Ignition system, electrical box, flywheel and flywheel cover may be modified or aftermarket. Battery charging circuit may
be disabled and/or removed.
8.7.2 An additional battery and battery box may be used. Batteries must fit into a proper battery box and be securely fastened.
Batteries may be relocated.
8.7.3 Engine temperature sensor assembly may be disconnected and/or removed.
8.8 TURBOCHARGER/SUPERCHARGER
8.8.1 Turbocharger housing must be of the full circulating, water-jacket type at all times when the engine is running. Aftermarket
turbochargers and superchargers may be used provided a hazard is not created. Original turbocharger or supercharger
may be modified. Aftermarket turbochargers and superchargers may be added to originally normally aspirated watercraft.
All hoses and pipes may be modified or aftermarket.
8.8.2 Intercooler may be modified or aftermarket.
8.8.3 Boost pressure-relief valve may be modified or aftermarket
8.8.4 Boost sensor may be modified or aftermarket.
8.9 DRIVELINE
8.9.1 Impeller, impeller housing, stator vane assembly, pump mounting plate and/or pump shoe may be modified or
aftermarket. Pump nozzle and directional nozzle may be modified or aftermarket. Overall length of the complete pump
and nozzle assembly may be no more than 50.00mm (1.97 in.) longer than original equipment. Aftermarket nozzle trim
systems may be used. Additional cooling fittings may be installed. Visibility spout must be removed or plugged. Silicone
adhesive sealant may be used in addition to original equipment seal to seal pump inlet.
8.9.2 Couplers, bearing housing and driveshaft may be modified or aftermarket provided they maintain a 1:1 drive ratio between
the engine and the pump.
RIB EXTREME RACING - försäljning, service & trimning Yamaha vattenskoter & snöskoter.
Email:
Tel: 070-517 56 90
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