Additional Classes

12.3.3 ULTIMA 250: For certain 126-250cc motorcycles produced within the guidelines of the Ultima Class specifications. Eligible machines, and exceptions, include but are not limited to: • 1983 Hondas and Suzukis are allowed. • Honda XR200, all years, are allowed. • 1982-’84 Maico and/or MStar, air-cooled, drum-brake only. • Yamaha YZ250s, up to 1982-’84 with YPVS system, are allowed. (Note: These are the only eligible motorcycles allowed to use a power-valve mechanism.) • 1982 and later Kawasaki 250s are prohibited. 12.3.4 ULTIMA 500: For certain 325-580cc motorcycles produced within the guidelines of the Ultima Class specifications. Eligible machines include but are not limited to: • 1982-’83 Can-Am Sonic with Rotax four-stroke engine • 1983-’84 Husqvarna 510 four-strokes • 1981-’83 Honda CR450/480, 1981-82 XR500. 1983 XR500 is prohibited. • 1980-’81 Kawasaki KX420 • 1982-’84 Maico and/or MStar, air-cooled drum brake only. • 1983-’84 Yamaha TT600 (Note: XT600 is prohibited). This is the only model allowed that is over 580cc (the maximum overbore is +.080”). 12.3.5 ULTIMA FOUR-STROKE: Certain 200cc-580cc four-stroke motorcycles produced with either single-shock rear suspension or an engine of newer technology. Eligible motorcycles and modifications include: • 1982-’84 Can-Am Sonic with Rotax engine • 1981-’82 Honda XR200/250/500 with Pro-Link rear suspension (1983 XR500 is prohibited). 1983 model XR350 with RFVC is allowed. XL350 models are prohibited. • 1983-’85 Husqvarna TC, TE, TX 510 four-stroke • 1983-’84 Yamaha TT600 (Note: XT600 is prohibited). This is the only model allowed that is over 580cc (the maximum overbore is +.080”).

12.4 ADDITIONALCLASSES

12.4.1 Open Age: Any rider on any size or type of eligible machine. 12.4.2 40+: Riders age 40 and older on any size or type of eligible machine. 12.4.3 50+: Riders age 50 and older on any size or type of eligible machine. 12.4.4 60+: Riders age 60 and older on any size or type of eligible machine. 12.4.5 70+: Riders age 70 and older on any size or type of eligible machine. Note: A rider may not advance to the next age-related class until after that birthday. Due to difficulties in laying out the race day program, competitors may enter no more than two rider-age classes.