(1) Engines will remain as twin cylinder 2 stroke engines based on a 350cc engine. BUT it will be allowed to be over bored
To a MAXIUM OF 1.5 mm (1 1/2 mm) PROVIDED THIS DOES NOT TAKE THE TOTAL ENGINE CAPACITY OVER 364cc.
NO engine modifications are allowed that will take the total engine capacity over 364cc
(2) A minimum of TWO engines will be checked for TOTAL ENGINE CAPACITY after each days racing.
This will normally be the winner.
Plus one random on the first days racing and possibly two random on the second day if it's the same winner both days.
This will be performed by at least two people involved in racing in this class chosen by yourselves at the start of the
One of course must be capable of doing the measuring and the quite simple sums to work out the engine cc.
The second can just be an observer to oversee fairness and continuity in the measuring procedures.
To enable commentators and the spectators to differentiate a F350 outfit from a F2 600, please ensure that your number plates are blue background with white numbers.
Minimum background size should be 285mm by 235mm for the front with numbers being 140mm high X 80mm wide and width of stroke 20mm.
Minimum background for the sides should be 260mm X220
Numbers shouldbe 120mm high 70mm wide 15mm stroke width, these should be the minimum size.
As per the A.C.U. handbook.
Number plates must not be traced round in the appropriate colour
All Post Classic Sidecars must be registered with the FSRA.
Chassis should be of tubular or box section steel construction in keeping with the cut off date of 1981, with the exception of bona-fide “copies” in which case the onus is upon the owner of the machine to prove to the FSRA the machines validity.
The chassis should be of “conventional” design.
No long wheelbase sidecars
The engine should be situated in front of the driver and on line between the front and the rear wheels.
Wheels may be of 10" 12" 13 "or 16" both slick and treaded tyres are eligible.
Streamlining must be of an appearance in keeping with the period.
Twin cylinder engines that started production by 1984 may be up to 1300cc four strokes.
Period 1 Multi cylinder engines and car derived engines may be up to 1300cc two or four stroke of a type that started production by 1978 e.g.GS10000, Z1000, TZ750S etc.
Period 2 Multi cylinder and car derived engines may be up to 1300cc four strokes of a type that started production by 1984 e.g. Air cooled GSX, FJs, GPZs etc
Machines that do not comply with the eligibility regulations but are of a “special interest " may be allowed to race at the discretion of the FSRA Committee
Machines that do not comply with the eligibility regulations but are of a “special interest " may be allowed to race at the discretion of the FSRA Committee.
If you would like more information about any of the classes please contact F350, Post Classic and Pre injection Rep Dave Tibbles
Tel 01455 888289
Any sidecar that had an engine that was originally manufactured with carburettors.