Snowmobile Classes

STOCK 800 (701-800cc)
STOCK 700 (601-700cc)
STOCK 600 (501-600 cc)
STOCK 500 LC (441-500cc LC)
STOCK 440 LC (401-440cc LC)
IMP 1000 (801-1000cc)
IIMP 800 (701-800cc)
IMP 700 (601-700cc)
IMP 600 (501-600cc)
IMP 500 (401-500cc)
OPEN
KID's 120

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PRO, TRAIL, 800 SINGLE PILE 700III AND 600III CLASSES - 4 SLED MINIMUM (50% PAYBACK) CLASSES FOR 4 STROKES WHERE AVAILABLE

Rules

Approved helmet, eye protection, long pants, over the ankle boots
Tethers mandatory
Stock sleds must have stock tracks
Clutch engagement no higher than 5500 rpm
Safety jackets recommended Children ages 16-18 must have parent/guardian approval Children ages 13-16 must have/show snowmobile safety certificate and parent/guardian approval

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Quads Trophy Class

Stock
Improved Stock
Unlimited/Modified

Call for rules - 616.498.1800
Approved helmet, eye protection, long pants, over the ankle boots
Must have working tether

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Vintage Sled Classes

(4 Sled Minimum (50% Payback) Working on making these trophy classes (Sponsorship opportunities call 616-498-1800)

Stock Fan Cooled Single:
1985 & older 0-400 cc fan-cooled single cylinder sleds, only OEM single piped production sleds (same as BEVRA Relic HD and Post 75 single)

Stock Fan 0-500
1985 & older 0-500 cc stock fan-cooled OEM single pipe, (all OEM single pipes production sleds, same as BEVRA Stock C Fan except with 500 cc displacement ceiling instead of 440 cc)

Super Stock 0-500
1985 & older 0-500 cc Stock Fan, F/A, or liquid-cooled, OEM single (twin pipes allowed- same as BEVRA SuperStock C except with 500 cc displacement ceiling instead of 440 cc)

Open MOD X
1985 & older 650 cc Stock Fan, F/A or Liquid-cooled, any pipe allowed (same as BEVRA Mod X class). Any aftermarket-piped sleds must run in this class only.

Note* All classes (except for Mod X) are for leaf spring sleds only with an engine/chassis production cut-off date of 1984 (1985 model year). The Mod X class allows IFS sleds with a CHASSIS production cut-off date of 1984 (1985 model year) and an ENGINE production cut- off date of 1989 (1990 model year). Engine chassis swaps between manufacturers (e.g. Arctic engine in a Yamaha) is allowed only in the Mod X class.

Questions about the classes, go to the www.bigextreme.com web site as the rules and specifications for the above classes are all spelled out. You can post questions on the tech line or call 616-498-1800.