Rules

2012 Miniakota Microsprint Stock 600 rules.
• Stock 600cc any year other than current year production.
• Take it out of the bike, put it in the car..........That's it......
• Any 600cc OEM CV Carbs, injection or Flat Sides allowed, No Mechanical fuel inj.
Engine 600cc 4 cylinder 4 stroke as comes on a stock production bike for public sale in the
U.S.A. No current year production engines. No titanium anywhere in or on the engine, unless it comes stock from manufacturer of engine on the production bike.
Except as noted, all internal and external engine parts must remain stock with no modifications, metal removal, or blueprinting.
Valve seat inserts may be reworked. Valve springs may be shimmed with standard or
aftermarket shims. Cam may not have a higher lift than the stock factory cam. (duration is open)
No reworking timing on stock cams and no aftermarket cams.
Cylinder head combustion chambers may be cleaned by bead blasting with valves seated in
place. No altering head in any way.
Cylinder head gaskets may be replaced only with original equipment manufacturers stock
parts (All 3 layers of the head gasket must be used). All other gaskets may be replaced with
duplicate aftermarket parts.
Light cleaning of gasket surfaces with steel wool, Scotch-Brite, etc. is allowed to remove carbon build up.
Transmission gears may be shimmed only for the purpose of proper engagement. Standard or
aftermarket shims may be utilized. All gears must remain in motor as factory stock released.
Aftermarket cam chain tensioned allowed for safety of motor.
Fuel injection engines may run carburetors. Injected with power commander allowed gas or
alcohol. No aftermarket mechanical timing modules allowed. Fuel injection engines running carburetors may change all fuel metering devices to tune fuel curve, Billet intake boots allowed.
Modification of oil pan & pick up allow allowed or aftermarket ok.
Modification to thermostat cover allowed or aftermarket ok.
Modification to water pump cover allowed or aftermarket ok.
Any air box OK, stock appearing CDI OK, aftermarket washable replacement air filter OK, power commander on fuel injection models only.
Any 600cc OEM CV carburetors, Flatsides OK.
Charging system must remain intact with all parts present.
Fuel bladder or RCI racing cell required
No dry sump systems are allowed unless it comes from the motorcycle manufacturer as
original equipment.
No aftermarket coils. No aftermarket throttle bodies other then flatslides.

Items subject to tech but not limited to. Top 5 drivers to draw tech items randomly.
• Displacement 600cc
o Remove right side crank case cover so the engine can be turned over.
o Remove cylinder #1 spark plug
o Find cylinder 1 2 3 or 4 bottom dead center.
o Measure Bore Dimension = B in mm
o Measure Stroke Dimension = S in mm
o Displacement =(B/2)x(B/2) x 3.14 x S x 100 (to get to CC’s)

• Porting: No porting on intake or exhaust
o Remove throttle bodies, look for grinding, sanding, or filling in ports
-ZX6R has some grinding marks from the factory
o Remove exhaust pipes, look for grinding and/or sanding

• Stock Gears, Clutch Operable: No removing factory gears from transmission.
o Put car in gear; pull in clutch handle to make sure car rolls free.
o Shift engine through all 5 or 6 gears. Start down in first, shift through all
5 or 6 gears to make sure there is no neutral anywhere except between first
and second. Each time the engine is shifted, rock car back to be sure the
gear is installed.
o Close ratio gears can be checked for by setting up a pointer on the front
sprocket and counting the number of times the front sprocket turns relative
to the Crank Shaft. Gears 1-4 will have to be checked. You will need the
ratios for that particular engine (many can be found in the Hyper catalog)
and a degree wheel to mount on output shaft.

• Charging system: The stock original factory charging system may not be
removed, and must remain in complete working order. No factory racing charging
systems.
o Check to be sure the wires coming from the flywheel cover are connected
to the rectifier and that the rectifier is connected to the engine harness.
o If charging system is suspected to be missing or incomplete the flywheel cover may be
removed to prove it is not there. The advantage comes when the flywheel
weight is removed, so if the flywheel is there and the charging system is
not working but is hooked up this is OK. If any pieces are missing or it is not hooked up this is a DQ. Use volt meter to see if it is working.

Wiring & Carbs: Check compliance on carbs & injection and throttle bodies.

• Cranks and Aftermarket Rods: No machining to remove weight from the crank
(no after-market cranks), Stock connecting rods must be used (no after-market
rods)
o Option 1:
- Remove right side cover
- Look through opening with Optic Scope
- Look for machining of crank and after market rods
o Option 2: (better)
- Remove oil pan (the engine mounting bolts may have to be
removed to do this)
- Inspect crank and rods from underneath the car.
*Aftermarket rod bolts may be used
$30 reimbursement from club to driver for oil/gasket recovery fee if legal.

• Cams: Cams must remain stock. Check for stock lift.
Cam timing must remain stock. No aftermarket cams aftermarket cam gears or slotted cam Gears. Factory size cam bolts must be used.
o Stock lift will need to be known before doing this check.
o Remove valve cover.
o Measure across the narrow section, then measure across the widest section
with a pair of calipers.
o Subtract the small number from the big number, this is the lift.
• Timing: timing cover can be roved to check for aftermarket advancer.
-Remove the timing wheel and check for alterations.
-Remove 1 of the cam bolts holding the cam gears on and check for slotted cam.
-Use dowel to check for proper dia hole.
-Use caliper to check bolt sholder dia side.

Protest. Any Paid Miniakota member can put a protest any other competitor prior to that nights heat races beginning. $150cash paid in a envelope with 2 items to be tech. If driver is deemed legal he shall receive $100 and the $50 goes to the club. If driver is deemed illegal $150 is returned to the protestee and penalties will be handed out.

Any driver found illegal will be banned for life........

Hoosier tires must be in place on all four tires during each event. Spec Right rear of a minimum of D20 with equivalent factory D20 duromiter spec before and 15min after the race.
Item to see tech.

Roll cages shall be at least 1 1/8 inch .065 wall thickness or 1 1/4 inch .065 wall thickness.
Roll cages must have sufficient fore and aft bracing.
All cages shall be made of chromoly steel or equivalent.
All cars must be equipped with nerf bars and not exceed beyond the rear tires.
All cars must have bumpers extending beyond the front and rear tires.

Alcohol or racing fuel may be used. NO ADDITIVES ALLOWED. This only applies to performance enhancers, is not meant to exclude top end lubricants. Random fuel checks may be conducted at the conclusion of any event.

The following placements can be expected to be tested: top 3 placements in the A main.

Fuel protest $250.

Minimum height of 10" on each side of tail and a minimum height of 12" on each side of top wing. Only 2 digit numbers allowed (#00-#99).
Single letter may be used with number.
Placing number on center section of top wing and center section of nose wing is recommended but not mandatory.