Photo courtesy ETechPhotos.
For the 2019 season, AHRMA’s 350GP class will be a featured series of events around the USA. Vintage 350GP bikes will compete at all AHRMA National road races. In addition to the normal trophies and awards, there will be added enhancements for the 2019 season, including:
• Enhanced trophies throughout the season
• Special awards for series champion
• Articles and photos on roadracingworld.com to spotlight the class
• Roadracing World print magazine enhanced exposure for AHRMA and 350GP
• Early access to paddock for pre-entered racers
• Racer spotlight features in Vintage Views
• Class champion on cover of Vintage Views magazine
• Aermacchis, Bultacos, Hondas, Ducatis, Suzukis, and many more qualify. See Page 41 of the 2018 AHRMA Handbook.
350 GRAND PRIX: Any of the following types of fully GP-kitted motorcycles built before Dec. 31, 1968, and like design: 350cc OHV/OHC four-stroke; 350cc air-cooled single-cylinder two-stroke; 250cc liquid-cooled, single-cylinder two-stroke; 250cc air-cooled twin-cylinder two-stroke. Among the eligible machines are:
• Aermacchi 350 four-stroke single roadracer
• AJS 7R
• Bianchi “works”
• Benelli twin “works” road racer and fours
• BSA 350 OHV single
• Bultaco 250 liquid-cooled single, round cylinder type only. Note: Bultaco AJR replicas are not allowed.
• Ducati 350 narrow- and wide-case Gilera
• Harley-Davidson ER/CRTT four-stroke road racer
• Honda CR77 “works” or replica, CB77 fully race-kitted. Note: The CB350F is not eligible for this class.
• Jawa “works” twin road racer
• Kawasaki A1R (not A7RA) twin, maximum 250cc
• McIntyre Special and replica, 7R powered
• Moto Guzzi single
• Moto Rumi “works” or replica
• MV triple
• MV four, early wide-angle head (pre-1973 era)
• MZ “works” 250 twin
• Paton twin
• Rickman GP road racing frame, powered by H-D ER/CRTT or AJS 7R
• Seeley 7R or other period engine
• Suzuki X6 with racing exhaust
• Triumph Tiger 80, 90 350cc twin
• Yamaha; no updating beyond TD1-C. Original carburetors may be replaced with 26mm Mikuni VM-type round-slide; power jets may not be in operation.
Note: Honda CB/CL/SL 350 twins are not eligible for this class. See 350 Sportsman or Formula 250
10.2.6 REQUIREMENTS AND MODIFICATIONS FOR GRAND PRIX CLASSES
a) All GP-class motorcycles must be fully GP-kitted, with no lights, no starting mechanisms, no street equipment or associated brackets (factory-welded brackets may be retained if desired), low narrow handlebars (maximum width 32 inches). Fairings are encouraged.
b) Frame may be changed to racing type, though must be period type and style (See rule 9.7.3).
c) Front forks may be changed, though must be period type and style. “Ceriani-type” may be no larger in diameter than 35mm, unless supplied as OEM on that motorcycle.
d) Period retrofit gearboxes are permitted (e.g., Quaife, Schafleitner). Maximum six speeds unless otherwise stated.
e) Front disc brakes are prohibited. Rear disc brakes are permitted, but must be period equipment.
f) Magnesium engine cases are allowed in 500 Premier.
g) The number of valves in the cylinder head may not be increased or decreased from stock.
h) No more than one carburetor per cylinder. Gardner carburetors are permitted.
i) All modifications must be consistent with the spirit of the class and period.
j) Appearance and workmanship of a reasonable standard shall be enforced.
k) Two-strokes must use silencers.
l) Maximum rim width is WM3 (2.15 inches) in all GP classes N.
Get those bikes out and ready to race in 2019!