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Thanks to the input of our members and NHKA Authorized Dealers, we are happy to provide you with the final version of the rule changes for 2020…
General Rules
All drivers must register and sign driver waiver BEFORE Safety tech Inspection.
All guests must be signed in at the front gate by 12pm (noon) on race days. No entry after noon unless prearranged. Any guests that are on the property without a proper wrist band will be removed from the property and the driver they are there with/for will be subject to penalties.
Transponders must be mounted to the seat back or side rear of the seat mount. They may not be carried on the driver’s person (i.e., in a pocket.)
A rolled black flag is pointed at a driver or a group of drivers it is a warning of a violation. So whatever it is you’re doing, knock it off.
LeCont Reds are now the spec tire for all 4-cycle classes. New or used MG Reds that have been scanned and marked by the NHKA are also legal for this season only.
Rear Wheels must be a minimum of 7.75″ wide for World Formula as well as TaG Junior, Senior and Masters classes.
Safety
All lead weights must be mounted securely to the kart. Minimum bolt size is 5/16″ or 8mm, and must be double nutted. One bolt per 1–5lbs, two bolts for 5–10lbs. Individual weights more than 10lbs must have their mounting inspected and approved by the race director. No stacking weights. All bolts must pass through a purpose-drilled hole (e.g., DO NOT mount dive weights through the belt slot, etc.) Lead sheets in seat must be bolted to the seat in the same manner. All weights must be painted white and have the kart number on them. Weights and their mounting will be checked during the pre-race safety inspection.
All karts must have safety wire and/or pins in all required areas. See the Pre-Race Kart Prep Sheet.
World Formula
Fuel: VP MS93, VP MS98, or designated local 93 octane pump gas. No mixing.
Spark Plug: Champion RG4HC only with .030–.040 gap.
Header Wrap or Header Guard: Required and subject to post-race tech inspection.
Premier Titan: Must be in stock configuration. (This is the clutch that comes with the WF engine package.)
Hilliard Flame: Stock Hilliard Flame parts only, including drum. All four shoes must be used as well as the dust shield behind clutch hub. Stock Hilliard springs only that may be configured utilizing pairs of equal tension. For example: 4 black or 2 black and 2 white. Stacking up to two springs allowed. Weights are NOT allowed. Drum and shoes must be dry from grease or oil.
Briggs 206
Fuel: VP MS93, VP MS98, or designated local 93 octane pump gas. No mixing.
2020 Briggs 206 Engine Rule Set: This goes into effect March 1st for all NHKA 206 classes. Changes from last year’s set are in red, the most notable being the immediate adoption of Autolite AR3910X as the only spark plug allowed. To read/download/print the new rule set click here.
Hilliard Flame: Stock Hilliard Flame parts only, including drum. All four shoes must be used, as well as dust shield behind clutch hub. Stock Hilliard springs only which may be configured utilizing pairs of equal tension. For example, 4 black or 2 black and 2 white. Stacking of up to two springs allowed. Weights are allowed. Drum and shoes must be dry from grease or oil.
206 Cadet Spec Gear: #35 chain will use 17-57 gears only. #219 chain will use 20-67 gears only.
206 Cadet Rear Wheels: Diameter must be 5″ and width must be 5 – 5.25” (130mm – 135mm.)
Header Wrap or Header Guard: Required and subject to tech inspection.
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