All engines 500cc SOHC 4-valve's unless otherwise noted.
MK5 -1985 revised 1987-89
MAX -1986 revised 1990
Optional points ignition or magnetic trigger device at crankcase.
Conrod options - Alloy rods = INA bearings,
Steel rods = FAG roller bearings.
There was also a 350cc version of the MAX for grasstrack racing.
Options included Carrillo-type conrods by Godden, and eccentric flywheels.
There was a proposed water-cooled Magnum that was to compete with the Jawa and GM longtrack engines, but never was produced.
Laydown MAX and MAGNUM engines are available today, can be seen in grasstrack events.
Telescopic forks - Traditional fork design and operation, stamped "GODDEN". Available in chrome(stiff) and nickel-plated(flex).
Leading Link - 1990 - Godden designed, stamped "GODDEN", available in chrome. This has a small shock absober to better dampen the front suspension.
Side port - Available in the 1960's and mid 1970's, stamped DGS, very popular for that time with JAP's and 2-valve JAWA's. Carb mounted at an angle to the riders right, air cleaner sticks out to right side.
Center-port - 1979-90's - Designed for 4-valve heads, allows carb to give straighter shot into intake. Carb and air cleaner hide under seat. Available in chrome(stiff) and nickle-plated(flex).
Piggly-Wiggly - A center-port design, but uses a bent single tube that curves to the riders left. Great handling diamond, very sought after. Available in chrome(stiff) and nickle-plated(flex).