Classic Specifications

1. Classes
   For classic hillclimbs the machines are divided into two classes that run in the same championship
   Vintage/Post Vintage - machines of a type made no later than the 31st Dec. 1944
   Classic - machines of a type made after 31st Dec. 1944 and before 31st Dec 1969 for four strokes and 31 Dec. 1960 for two strokes
2. Specials - will be allowed in both classes provided they are constructed from components made in the required period
3. Oversized engines - will be allowed in both classes provided the capacity is disclosed.
4. Allowable later components - It is not possible to make a period hillclimber without using some modern parts, The following are allowed.
   
   Carburettors:
   Vintage/PV: Amal TT, GP and separate float chamber roadster carburettors.
   Classic: Any modern carburettor up to 1 1/2" choke diameter metered jet construction. CV carbs are not allowed.
   
   Hydraulic steering dampers:
   Will be allowed on all classes in the interest of safety.
   
   Tyres and rims
   Vintage/PV: All hubs will be half width type, not full width. Rims will be no larger than WM3. Tyres will be no wider than 4.35" (110mm) across the tread profile.
   Classic: No restrictions on tyre widths, patterns or materials. Rim diameters should be 18" or 19" smaller will be allowed where fitted as original equipment.
   
   Forks, Frames, engines, hubs and brakes.
   Must be of a type fitted in the period and for Vintage/PV of a type fitted to a rigid machine made before 31st DEC 1955. No disc brakes are allowed
   
   Rear Shock absorbers
   Modern units may be used provided they are not remote reservoir.
   
   Tachometer
   Modern tachometers will be allowed
   
   Fuel tanks
   Modern fuel tanks will be allowed as long as they do not look out of place or their origin has been disguised.
   
   Miscellaneous parts
   Modern parts such as mounting plates, fuel and oil tanks, brake plates, seats etc. will be allowed, but not major items such as crankcases,cylinder heads, frames, forks etc.
   
   Internal changes
   Any change that does not show externally is allowed.
   
   Twin leading shoe brake conversions
   Any conversion is permitted on an eligible hub provided it is in the spirit of the class.
   
   Later replacement parts
   Later parts are allowed as long as they look similar to that which they are replacing and do not confer any advantage.
   
   
5. "Of a type" This phrase means machines or components made after the cutoff date, but allowed if identical, or virtually identical to those made in the required period. As an example a 1947 Velocette model MSS would be allowed in the Vintage/PV class as it is identical to a 1940 model and can only be identified by its serial numbers. A 1948 MSS would not be eligible as it was fitted with a telescopic fork, but would be allowed if an earlier girder fork conversion has been done.
6. Sidecars and three wheelers - These will meet the same regulations as the solos plus the following
   
   Vintage/PV will consist only of a motorcycle to which a sidecar has been attached. Minimum wheel size for all wheels is 17"
   
   Classic sidecars will be allowed a welded up chassis provided the motorcycle part of the chassis is made from the frame of an eligible motorcycle. Front and real wheels must be spoked and have a minimum diameter of 16" The sidecar wheel minimum diameter is 10" and may be of disc construction.
   
   Three wheelers (Vintage and Classic) Must be a three-wheeler made in the required period. Only period modifications will be allowed.
   
   Other sidecars and three-wheelers - The only exception to the preceding rules will be for sidecars and three-wheelers that were raced in the relevant periods and are substantially in their original condition. The onus is on the rider to provide proof. No replicas will be allowed.
   
   
7. Superchargers - will not be allowed as they were virtually unknown in hillclimbs during both periods
8. Disputes - If there is a dispute about a machine or component it is the responsibility of the rider to provide proof of the age of introduction.
9. General note - these rules are intended to ensure that machines "look right" for their period. It is not possible to provide an exhaustive list. A machine may be deemed ineligible if it does not meet the spirit of the class and each machine will be considered on an individual basis.