2013 Manual of Motorcycle Sport - Motorcycling Australia

12 ALL DISCIPLINESenjoy the ride9612.8.6.2 Handlebar levers must:a) Have ball ends with a minimumdiameter of:i) 15mm, for levers longer than76mm,ii) 10mm, for levers shorter than76mm.b) Measure no more than 200mm fromthe fulcrum to the extremity of the ball.12.8.6.3 Throttle controls must be self closing.12.8.6.4 A lanyard operated ignition cut-out switch,operating on the primary circuit, must befitted to the following:DISCIPLINEMACHINESpeedway –Solo & SidecarsJunior & SeniorMotocross –SidecarsJunior & SeniorDirt trackSidecarsTrackSidecarsRoad raceSidecars12.8.6.5 For Road Race, Motocross and Dirt Track,the lanyard must have a maximum length of1 metre.12.8.7 Kick Start Levers12.8.7.1 Kick start levers, other than transverse, mustbe folding.12.8.8 Drive Chain Protection12.8.8.1 Primary drives must be guarded so asto prevent direct access to the chain orsprockets with the fingers.12.8.8.2 The guard must be constructed of:a) Metal having a minimum thicknessof 1.6mm, which may be mesh orexpanded metal provided the openingsdo not exceed 10mm, orb) Fibreglass having a minimum thicknessof 3mm.12.8.8.3 If a plastic, fibreglass or part open chainguard is used, a steel bolt of not less than10mm diameter, placed outside the bottomrear quadrant of the clutch sprocket. Thisbolt, if damaged, must be replaced.;12.8.8.4 Projecting sprockets, which are not behinda clutch assembly or directly behind aframe member, must be guarded where thesprocket teeth are further than 30mm from aframe member or swinging arm.12.8.8.5 A counter shaft sprocket which is more than30mm from the outside of the swing armpivot, must be covered.12.8.8.6 Other than CMX/CDT, a chain guard madeof suitable material must be fitted in a wayto prevent trapping between the lower drivechain run and the final drive sprocket at therear wheel.12.8.9 Tyres12.8.9.1 Tyres must comply with the following:a) Metal studs, spikes, chain, rope orother non-skid attachments may not beused unless permitted by the relevantSR.b) Treads on tyres must be at least 1mmdeep on any part of the tyre that comesin contact with the ground.c) The tread depth indicating holes onslick tyres must be clearly visible and atleast 0.5mm deep.d) Paddle or scoop treaded tyres may notbe fitted.12.8.9.2 Valve caps must be used for all competitions.12.8.10 Mudguards12.8.10.1 Either a rear mudguard or a seat must befitted which extends at least 20 degrees tothe rear of a vertical line drawn through therear wheel axle.12.8.10.2 Mudguards must be made of a material,which is not liable to cause personal injury ifdeformed.12.8.11 Sidecars - All Classes – except MotoTrials12.8.11.1 Left hand and right hand sidecars maynot compete against each other with theexception of Motocross, Classic Motocrossand Historic Road Racing.12.8.11.2 Sidecars, in addition to complying with therequirements for solos, must be as follows:a) The sidecar body width must be890mm measured from the closestmounting point to the extremity of thesidecar body including any step,b) The track must be a minimum of580mm and a maximum of 1,005mm,c) Ground clearance must be a minimumof 88mm and a maximum of 325mm,d) The sidecar must have at least 4mounting points,e) The inside of the sidecar wheel must beenclosed to floor level,f) Rear sprockets and chains must beenclosed around the passenger’sworking area,g) Any step must have a maximum widthof 200mm from the sidecar,