ROTAX MOJO MAX Challenge Technical Regulations 2013

APPROVED1. Rotax Mini-MaxROTAX MOJO MAX ChallengeTechnical Regulations 2013Appendix for 125 Mini MAX and 125 Micro MAX – CanadaVersion 03.22.20131.1 ChassisOnly standard chassis are allowed.1.1.1. Wheelbase: minimum: 101 cm, maximum: 110 cm1.1.2. Maximum rear track width: 136 cm1.1.3. Front brakes are forbidden1.1.4. In dry and wet conditions, side bodywork may not belocated outside the plane drawn through the externalpart of the rear wheels (see image)1.1.5. Rear protection mandatoryDry &WetConditionsMini-MaxOnly1.2 Rear ProtectionCIK-FIA Homologated plastic rear protection system must be used. The rear protection system can befrom a different manufacturer than the chassis.Rear protection must have an overall width not exceeding the rear width of the kart at any time,measured outside the rear wheels or tires, whichever is the greater.1.3 TiresAll participants must use the same brand of tire, which will be announced in the supplemental regulationof the event.Rim dimensions (slick & wet) : Front rim maximum width : 135 mmRear rim maximum width: 185 mm2013 Rotax Max Challenge Micro-Mini technical regulations - Canada version : 2013-03-22 Page 1 of 8

1.4 GearingAll participants must use an original 13 tooth front sprocket. The supplemental regulations of the event orChampionship regulations may specify a unique gearing ratio (front and rear sprockets) for allparticipants.1.5 Technical regulation (inside the engine seal) for Rotax Kart engine 125 Mini MAX (10 kW).Section 9.5 is added to the 2013 RMC Technical Regulation:9.5 Technical Specification (within the engine seal) for ROTAX kart engine125 Mini MAX (10 kW)For the engine configuration 125 Mini MAX, everything that is not specified below, latest technical regulation2013 for engine configuration 125 Junior MAX is valid.It is the responsibility of the competitor to check his equipment (all components outside the engine seal andmentioned below), to assure that his equipment is in line with the technical specification below!Squish gap 1.11.2125 Mini MAX 1,20 mm – 1,80 mmFor Canada minimum 2,80 mmTo achieve the defined Canadian squish gap, a spacer (ROTAX part no. 626420, same shape as a cylinder base gasket) plus the different required basegaskets must be used. The squish gap must be measured with a certified slidegauge and by using a 3 mm tin wire. The crankshaft must be turned by handslowly over TDC (top dead center) to squeeze the tin wire. Recommended 3mmtin wire (ROTAX part no. 580 132).The squish gap must be measured on the left and right side in the direction ofthe piston pin. The average value of the two measurements counts.Inlet system 6.5 The gap between the two reed petal stoppers must be of a minimum of 20,5 mmin any place between the two stoppers and must be evenly space to centre ofthe reed cage, as shown in the illustration below.2013 Rotax Max Challenge Micro-Mini technical regulations - Canada version : 2013-03-22 Page 2 of 8

1.6 Technical specification inside the seal for the Mini-Max engine configuration.Section 9.6 is added to the 2013 Rotax Max Challenge Technical Regulation for Canada.9.6 Technical Specification (outside the engine seal) for ROTAX kart engine 125 Mini MAX (10 kW)For the engine configuration 125 Mini MAX, everything that is not specified below, the Technical Specificationof items 9.2 for engine configuration 125 Junior MAX is valid. It is the responsibility of the competitor to checkhis equipment (all components outside the engine seal and mentioned below), to assure that his equipment isin line with the technical specification below!Intake restrictorAuthorized distributors organizing a national MAX Challenge for the category125 Mini MAX may determine which intake restrictor must be used.2.1 Version 1The intake restrictor (ROTAX part no. 267 535) must be fitted between thecarburetor flange and the carburetor.The intake restrictor must show an inner diameter of 19,0 +0,0/-0,2 mm.The intake restrictor must show a blue anodized surface.For Canada: Only Version 1 is allowed.2.2 Version 2The intake restrictor (ROTAX part no. 267 530) must be fitted into thecarburetor flange.The intake restrictor must show an inner diameter of 19,0 +0,2/-0,2 mm.The intake restrictor must show 4 fins in the inlet bore.Exhaust system 3.1 The exhaust restrictor (ROTAX part no. 273 972) must be used instead of theoriginal exhaust socket (fitted to the cylinder).3.2 The exhaust restrictor must show an inner-diameter of 22,0 +0,2/-0,2 mm.3.3 Exhaust steel mat (ROTAX kit 297983) is an allowed option.Noise emissions 4.1 Noise isolating mat (see illustration exhaust system) has to be replaced by aoriginal ROTAX spare part, if the noise emission is exceeding 90 dB (A)4.2 Noise emission measuring procedure:The measuring place has to be at section of the track where the engine isoperated under full load and at a range between 9.000 and 10.000 rpm.The microphone has to be installed 1 meter above the level of the track in arectangular angle to the track.The distance between the microphone and the kart on the ideal line on thetrack has to be 7,5 meters.The kart has to be operated under full load at the ideal line on the track.Carburetor 5.1 Regulations for carburetor for Junior and Senior Max engines applies except:5.2 Only floats marked 3,6 gr are allowed.5.3 Only idle jet jets stamped 60 is allowed.5.4 Only idle emulsion tube stamped 60 is allowed.2013 Rotax Max Challenge Micro-Mini technical regulations - Canada version : 2013-03-22 Page 3 of 8

2. Rotax Micro-Max2.1 Chassis2.1.1 Only Cadet chassis type are authorized2.1.2 Maximum wheelbase: 95 cm2.1.3 Rear axle: 25 mm solid or 30 mm hollow with a 4.9 mm minimum axle wall thickness2.1.4 Front brakes are forbidden2.1.5 Maximum rear track width: 120 cm2.1.5 Each outer edge of the rear wheels may be a maximum of 2.5 cm narrower than the outer widthof the appropriate side pod2.1.6 Rear protection mandatory2.2 Rear protectionRear protection must be made of plastic or magnetic steel and must not present any danger as regardssafety.The unit must be attached to the frame in at least 2 points by supports made of plastic, steel oraluminium (possibly by a supplemental system) on the 2 main tubes of the chassis, or on the currentlyused bumper (upper bar and anti-interlocking bar, Article 2.5.2 or the CIK-FIA technical regulation).Rear protection must cover at least 50% of each wheel/tire assembly at all times measured at thecentre-line of the tire.Rear protection must have an overall width not exceeding the rear width of the kart at any time,measured outside the rear wheels or tires, whichever is the greater.2.3 TiresAll participants must use the same brand of tires, which will be announced in the supplementalregulation of the event.Rim dimensions (slick & wet) : Front rim maximum width : 135 mmRear rim maximum width: 135 mm2.4 GearingAll participants must use an original 14 tooth front sprocket. The supplemental regulations of the eventor Championship regulations may specify a unique gearing ratio (front and rear sprockets) for allparticipants.2.5 Technical Specification (within the engine seal) for ROTAX Kart engine 125 Micro MAX (5 kW)Section 9.7 is added to the 2013 RMC Technical Regulation.9.7 Technical Specification (within the engine seal) for ROTAX kart engine 125 Micro MAX (5 kW)For the engine configuration 125 Micro MAX, everything that is not specified below, the TechnicalSpecification of items 9.1 for engine configuration 125 Junior MAX is valid.Squish gap 1.1 125 Micro MAX 2,40 mm – 2,70 mmAuthorized distributors organizing a national MAX Challenge for thecategory 125 Micro MAX may determine a more restrictive squish gapwithin this tolerance.2013 Rotax Max Challenge Micro-Mini technical regulations - Canada version : 2013-03-22 Page 4 of 8

1.2 To achieve the defined squish gap, a spacer (ROTAX part no. 626 420,same shape as a cylinder base gasket) with a thickness of 1,25 mm or 1mm plus the different required base gaskets must be used. The squishgap must be measured with a certified slide gauge and by using a 3 mmtin wire. The crankshaft must be turned by hand slowly over TDC (topdead center) to squeeze the tin wire.Recommended 3mm tin wire (ROTAX part no. 580 132).The squish gap must be measured on the left and right side in thedirection of the piston pin. The average value of the two measurementscounts.2.6 Technical Specification outside the engine seal for Rotax Kart Engine 125 Micro MAXSection 9.8 is added to the 2013 RMC Technical Regulation:9.8 Technical Specification (outside the engine seal) for ROTAX kart engine 125 Micro MAX (5 kW)For the engine configuration 125 Micro MAX, everything that is not specified below, latest technicalregulation 2013 for engine configuration 125 Junior MAX is valid. It is the responsibility of the competitor tocheck his equipment (all components outside the engine seal and mentioned below), to assure that hisequipment is in line with the technical specification below!Exhaust restrictor 2.1 The exhaust restrictor (ROTAX part no. 273 972) must be used instead ofthe original exhaust socket (fitted to the cylinder).2.2 The exhaust restrictor must show an inner-diameter of 22,0 +0,2/-0,2 mm.Carburetor 3.13.2The spacer (pos. 1, see illustration below, ROTAX part no. 251 730) mustbe fitted in the carburetor to limit the opening of the throttle.The length of the spacer has to be 38,0 +/-0,2 mm.2013 Rotax Max Challenge Micro-Mini technical regulations - Canada version : 2013-03-22 Page 5 of 8

3.3 The tolerance gauge (ROTAX 277400) must not be ableto turn around (opening limit of carburetor slide)!3.4 The position of the cap of the carburetor must be fixed by means of thefixation plate (pos. 1 see illustration below, ROTAX part no 251 790 .3.5 The cap of the carburetor has to be screwed completely on to thecarburetor.3.6 Only one rubber gasket is allowed to be used in the carburetor cap.3.7 Regulations for carburetor for Junior and Senior Max engines appliesexcept:3.8 Only floats marked 3,6 gr are allowed.3.9 Only idle jet stamped 60 is allowed.3.10 Only idle emulsion tube stamped 60 is allowed.3.11 Main jet is free but are limited to those supplied in Rotax Micro Max jetpackage. (Rotax part 281476, which includes main jets : 115-118-120-122-125-128-130)Radiator 4.1 A specific "Micro MAX" radiator (ROTAX part no. 295 924 or 295 923)must be used instead of the original radiator.Radiator must be mounted with all components similar to the illustrationversion 2 or 3 for the 125 MAX engine.(see item 18.8 of the technical regulations 2013).2013 Rotax Max Challenge Micro-Mini technical regulations - Canada version : 2013-03-22 Page 6 of 8

Cooling area:height = 280 - 300 mmwidth = 58 - 62 mmthickness of radiator = 30 - 34 mm4.2 No additional non-original cooling device is allowed. For versions 1 & 2,tape applied around the radiator is the only allowed air flow control. Tapemay not be removed from the radiator during operation on the track. Allother means of air flow control through the radiator are prohibited.For version 2, the original plastic flap must not be removed.For Canada: Removal of the original plastic flap of the radiator is anacceptable configuration.Exhaust system 5.1 The specific "Micro MAX" exhaust system must be used instead of theoriginal exhaust system (see illustration below).5.2The inner diameter of the 90° tube at the end of the silencer must be 15+/- 0,30 mm.2013 Rotax Max Challenge Micro-Mini technical regulations - Canada version : 2013-03-22 Page 7 of 8

5.35.4No exhaust leakage allowed (no signs of oil). Exhaust must be sealed withheat resistant silicone (XPS KarteTec instant gasket black, part no 25151or equivalent.Additional to the standard isolation mat a special steel isolation mat of thesquare dimension of 165 +10 mm is mandatory to be assembledunderneath the standard isolation mat as in following illustration (ROTAXpart no. of kit 297983).Clamp (1) must be fitted at a distance of 18+/-2mm, measured from theend of the tube.Clamp (2) must be fitted at the end area of the steel isolation mat.10-12mm is a specification for assembly purpose only!Both clamps are mandatory5.5 For measuring the exhaust gas temperature, it is allowed to weld on asocket of the exhaust in an area of 50-80 mm from the ball joint.5.6 The exhaust cover outlet must be installed as supplied by ROTAX in thedownward pointing position.Noise emissions 6.1 Noise isolating mat (see illustration exhaust system) has to be replaced bya original ROTAX spare part, if the noise emission is exceeding 90 dB (A).6.2 Noise emission measuring procedure:The measuring place has to be at section of the track where the engine isoperated under full load and at a range between 8.000 and 9.000 rpm.The microphone has to be installed 1 meter above the level of the track ina rectangular angle to the track. The distance between the microphoneand the kart on the ideal line on the track has to be 7,5 meters. The karthas to be operated under full load at the ideal line on the track.The microphone has to be installed 1 meter above the level of the track ina rectangular angle to the track.The distance between the microphone and the kart on the ideal line on thetrack has to be 7,5 meters.The kart has to be operated under full load at the ideal line on the track.2013 Rotax Max Challenge Micro-Mini technical regulations - Canada version : 2013-03-22 Page 8 of 8