Eligible Engines

Class 1

Veteran – Engines homologated before the end of 1963

Clinton A400,A490,E65, JAP J80, West Bend 58007,V580,610, Aspera AH47, AH51,AH58, Power Products AH61 1299,AH61 1342,AH51,AH58 Super,AH61 1340, Harper Vincent 1962, Villiers 6F,9F,10F,1F, Ydral Y60, Erikaze GC50, Homelite K92,K95,K100, JLO L101,LH101,LK101, McCulloch Mc2,Mc5,Mc6,Mc7, Mc10, Mc20,Mc30, Montesa 1962, Parilla V11, Saetta V11,V12, Stihl SK120, Guazzoni 10HP,12HP, Bultaco K100, DEM 1962, Komet K12,K12S,K12C, Konig MM.

Vintage – Engines homologated before the end of 1971

All engines eligible for the Veteran Class plus the following: BM F100, F100JB, F100C, Guazzoni VR2, VR2A, VR3, VR4, SVR2, SVR2A, SVR3, SVR4, VR1, VR7, VR8, VR10, JLO L99, Komet K22, K33, K44, K55, K96, K77, K88, McCulloch MC7/8, Mc8, Mc9, Mc40, Mc45, Mc45D, Mc91, Mills HK99, Montesa M100, M100S, Parilla S13, S13AC, BA13, TG14(L), GP15(L), MK16, HF17, Petry SFK100, SFK100R, Saetta V16, V17, V18, Starr SS100, Stihl SK140, SK150, Vega VIC19, VIC19L

Historic – Engines homologated before the end of 1977

All engines eligible for the Vintage Class plus the following: Arisco C75, BM FC/52, FCL, K96/3, DAP Corsair T70, T81, T71, Delta VRS74, Fieldhouse Manx 100, Hewland/Arrow KE3, KE4, Guazzoni CT11A, Komet K75, K78, K78TT, K88TT, K89, Parilla SS20, TT22, IMI Milano 100FVT, McCulloch Mc91B, Mc92, Petry P100L, SFK100RR, Sirio SC504, ST/50, ST/52, ST/L, Zip Zed1

Classic – Engines homologated before the end of 1984

All engines eligible for the Historic Class plus the following: Arrow KE5, Audax A2, BM 97TT, 98TT, Atlas 15, 28, Carrell 78A, 80S, DAP T72, T82, T91, T92, T75, Dino 100, 100R, 100TT, 1003K, Fieldhouse Manx 100L, Hetschel KZH RL, Komet K55TT, K80TT, Jrabor PAJ19A, Minarelli K100V, Mugen MK100A11, Parilla TT23, TT26, TT27, 5T28, TT31, PCR TS50/3, TS54/3, TS50,3 Reed, KS2000, TS54/3 Reed, Petry FL100, FK100, P101K, P101L, P101M, Refo A3, A6, B3, B5, RKD RD82, IT82-3, IT82-5, Rotax R100, SA Racing CB82, Sirio 51TT, TT45, TKM FF99, FF99TT, L90TT, S89, S89-3, S89TT, RL66-TT, RS89-TT, VMK100, Yamaha KT100A, KT100S, KT100AII, KT100AX, KT100AX-3, Zip 48

Class 4

Veteran – Engines homologated before the end of 1963

Class IV Special: Maico 196, Montesa 125, Puch SVS/K, Sachs 200, Villiers 6E, 8E, 9E, Zundapp 1962, DKW 1962

Class IV Super: Bultaco 175, K200

Vintage – Engines homologated before the end of 1971

All engines eligible for the Veteran Class plus the following:

Class 200 Villiers: Villiers 6E, 8E & 9E. Stroke 72mm.  Maximum one carburettor.  The barrel, head, crankcase and gearbox must be of the original Villiers type and have the external appearance as homologated.

Class 250 International: Ariel 200, Bridgestone 175 twin, Bultaco K125, K200, K200/5, K250/5, DKW 1962, Flowrite Montesa ICRV, Maico 175 and 196, Merlin MRV1, MRV1S/S, Montesa 125, Impala, Impala Cross, Cappra 250/4, King 250/5 Ossa K196, 250, 250 K5, Puch SVS/K, Saetta V200, Suzuki T200K, Villiers 31C, 2L, 3L, Starmaker, Starmaker-Kent, Zundapp 1962

 

Historic – Engines homologated before the end of 1977

All engines eligible for the Vintage Class plus the following:

Class 125:  Single cylinder air cooled engines produced before the end of 1977.  Maximum 125cc.

Class 210 National:  This class is basically for the Villiers 9E engine and associated models, together with modern replicas of that engine. The engine to consist of a single cylinder air-cooled two-stroke with gearbox mounted in unit and with no more than four operative gears. The engine shall be piston timed with a single carburetor facing rearwards. The ignition system shall be free. The stroke shall be 72mm and the maximum bore 60.9mm. The engine shall be equipped with a single sparking plug. The maximum diameter of the cylinder barrel fins shall not exceed 160mm and the barrel shall have 14 fins. The overall height of the cylinder barrel between flange faces shall be between 130mm and 133mm. The maximum diameter of the cylinder head shall not exceed 160mm and the height of the cylinder head shall not exceed 76mm. The head shall have 19 vertical fins. The gearbox casing shall be of identical appearance to the original Villiers 9E 10E and 11E pattern. The exhaust outlet will be in the same position to that of an original Villiers barrel and will take an exhaust pipe not larger than 13/4in O.D. The engine mounting points to be as the original pattern and the contours of the crankcase to conform to the original Villiers outline. The silencing system shall comply with the R.A.C. Regulations.  Reed valve induction is permitted providing that the original position of the induction pipe is retained and that the valve is only fitted in the induction tract.

Class 250:  Series production air cooled engines produced before the end of 1977.  Maximum 250cc, 6 gears and two cylinders.

Classic – Engines homologated before the end of 1984

All engines eligible for the Historic Class plus the following:

Class 125:  Single cylinder air cooled engines produced before the end of 1984.  Maximum 125cc.

Class 250:  Series production air cooled engines produced before the end of 1984.  Maximum 250cc, 6 gears and two cylinders.

More Details
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