THESE ARE 3DRACEWAYS 2010 SEASON RULES. THESE RULES ARE THE AKRA NATIONAL KNOWN RULES. WITH THE ODKRA RULES,YOU DONT HAVE A SPECIFIC CAM RULE THAT YOU GO BY. THERE IS A NUMBER OF STOCK CAMS THAT WILL FIT AND MAKE THE MOTOR STILL HAVE STOCK LIFT.


OHV CLONE RULES

APPROVED ENGINES--OHV engines generally referred to as Clones with a maximum displacement of 200cc's. (current legal engines include the Lifan, Grey Hound, Harbor Freight blue & yellow, Jaingdong, Yamakoyo, Blue Max)

ENGINE SPECIFIC TECH SHEET FOR BOX STOCK 6.5 OHV

Single cylinder, 2 valve, ohv 4 cycle

Important note: All parts must be Box Stock factory production parts unless otherwise specified in these rules. NO MACHINING OR ALTERATION OF PARTS IS ALLOWED UNLESS SPECIFICALLY NOTED. All parts will be subject to comparison to a known box stock part( when performing comparison check it is recommended to use a +/-.005" tolerance.) Engine will be teched as raced. There will also be a $200 claiming rule in place for this engine. Refusing to accept the claimer will result immediate disqualification of competitor along with forfeiture of 1/2 points earned to date in class and suspended for 2 races. Second time offense: you will be moved out of the class.

COMBUSTION CHAMBER VOLUME: 27.5 cubic centimeter minimum, with piston at TDC<using prescribed procedure.

CYLINDER HEAD REQUIREMENTS: must be OEM casting only. Porting and /or grinding are not permitted. Valve seals are two angles,45 degrees valve face and 30 degrees top relief. Stock head bolts only, must have four. Head gaskets maybe after market, must be of stock configuration. No copper or aluminum gaskets allowed. Any stock configuration gasket allowed on exhaust, no other sealer.

BORE $ STROKE: Stock cylinder bore is 2.685" max. Stroke is 2.123"+/-.005.

CARBURETOR REQUIREMENTS: Huayi or RUI*ING model carb only. Carb to intake sealer is gasket only no other sealer allowed. Choke must be as supplied from factory, but may be fixed to stay in open position. Choke bore .810 NO-GO. Venturi .615"NO-GO. Rear carb bore .751"NO-GO. Main fuel jet up to .042 NO-GO. Stock air cleaner assembly only.

If you are running a floor mounted tank, Pulse type fuel pumps are allowed. Fuel pump must be pulsed from either the crank case or the valve cover. You must install a flat metal plate in the original tank location for the purpose of mounting the throttle linkage and fuel pump.

VALVE TRAIN: Stock valve cover only with any stock configuration gasket, no sealer. Factory sealer rocker arms and push rods only. Stock valves only 45 degree angle on both valves, no modifications allowed. Only Box Stock valve springs . Max wire diameter on spring wire is .0698" with a maximum tension of 10.8lbs. at a height of .850".

IGNITION SYSTEM: Stock Box Sysytem only and must be unaltered. Kill switch and low oil sensor may be disabled and removed.


FLYWHEEL: Box Stock flywheel only with plastic fins. No alterations of any type allowed. Must also run stock flywheel key. Minimum bare wieght is 8.2lbs. Pull rope may be removed to make it accessible for use with a starter box.

PISTON AND RINGS: Must be unaltered Box Stock only. NO MACHINING OF ANY TYPE ALLOWED.

CONNECTING ROD: Stock Box rod only. NO MACHINING OF ANY TYPE ALLOWED. Stock rod bolts only.

CRANKSHAFT REQUIREMENTS: Stock Box crankshaft equired. MACHINING< POLISHING< ADDITION OF MATERIAL OR OTHER ALTERATION OF CRANKSHAFT IS PROHIBITED. Stock factory timing gear mandatory and must be installed in original location. Crankshaft journal diameter is 1.180"-1.175"min.

CAMSHAFT REQUIREMENTS: Stock as cast camshaft only. See profile listed below. THe following Box Stock Cam Profile is NOW recognized by the Box Stock Project.

Box Stock Cam Profile Specs

EXHAUST
.020 LIFT 50 DEG BBDC
.050 LIFT 27 DEG BBDC
.100 LIFT 11 DEG BBDC
.150 LIFT 8 DEG ABDC
.200 LIFT 33 DEG ABDC
MAX LIFT .232 OFF CAM
.200 LIFT 64 DEG BTDC
.150 LIFT 37 DEG BTDC
.100 LIOFT 19 DEG BTDC
.050 LIFT 1 DEG BTDC
.020 LIFT 17 DEG ATDC
CENTER LINE 109 +/-3DEG

INTAKE
.020 LIFT 14 DEG BTDC
.050 LIFT 5 BDEG ATDC
.100 LIFT 23 DEG ATDC
.150 LIFT 45 DEG ATDC
.200 LIFT 74 DEG ATDC
MAX LIFT .225 OFF CAM
.200 LIFT 34 DEG BBDC
.150 LIFT 7 DEG BBDC
.100 LIFT 14 DEG ABDC
.050 LIFT 33 DEG ABDC
.020 LIFT 52 DEG ABDC
CENTER LINE 109+/- 3 DEG

MAX LIFT .242 ON EXHAUST TAKEN ON VALVE SPRING RETAINER WITH ZERO LASH.

MAX LIFT .238 ON INTAKE TAKEN ON VALVE SPRING RETAINER WITH ZERO LASH.

USE +/- 3 DEG ON ALL LIFT CHECKS

block requirements: Block must remain stock as produced. Stub for governor may be removed and hole plugged. NO MSCHINING OF BLOCK ALLOWED. Welding to the block shall be for rod damage repair only and may not constitute a functional modification.

CLAIMER RULE: You must finish the race in the Box Stock class to purchase the winners engine for $200 (minus the clutch/chain guard, throttle kit, header pipe/muffler, air filter adaptor,air filter, top plate & fuel pump.) ONly the top three are alloawed to be claimed. The protest fee is $50.00 and if you protest you must tear down also. Any illegal parts found will be confiscated and kept by the promoter.

http://www.flattrack.com/index.php?optio...686&catid=3
I THOUGHT YOU MIGHT WANT TO KNOW A LITTLE MORE ABOUT NICALEE AND A.I.R. Oops, sorry for yelling

they need to go by the rules and enforce the rules like pros in pro classes if you ride pro then you are not allowed to ride in a am class like alot of you do....just because you own a quad and have been in 1 race and think hey i could do this for money instead of a trophy your wrong..... and yes we all have been hurt racing and seen friends get hurt if the track official stops a race then he must have a reason mabe a am rider in a pro class or a bunch of ams in a pro class just cant get it together..pros conduct themselves in a professinal manor and if there is a problem you need to act like a pro and talk to the official and mabe get the whole class there and mabe the track ppl will see it your way and have a race....so mabe eveyone that signs up as a am should have to win 3 races in a row to move up to pro just a thought........


Ed Whitney pro quad 76

Ed makes a great point.And the number1 rule at any track is the race offical has the final say no matter what the reason!

WHEN THE CHECKER FLAG DROPS,THE BULL **** STOPS!
LEAVE IT ON THE TRACK.
Lets race and have fun.That's why we're here!

Amen, Ed

The American Motorcyclist Association does not train or certify
officials who preside over AMA sanctioned standard competition
events. Participants are solely responsible for their own safety. All
officials must be members of the AMA.
A. Referee
1. The Referee is the principal officer of a meet, acting as
general supervisor. He does not, however, carry out the
duties of any other official. The Referee must be
introduced at the rider’s meeting and be available
throughout the protest period. It is the promoter’s
responsibility to appoint a Referee who is well qualified.
The Referee may not compete in the meet.
2. The Referee’s duties are:
a. To determine if any changes in the course are
necessary.
b. To request the official sanction from the promoter and
to post it at the registration area.
c. To determine if all other appropriate officials are
present, and to ensure they are performing their
duties properly.
d. To direct the starter to black flag a rider for any safety
reasons, including excessive oil leaking from the
motorcycle, mufflers that are loose or not working
properly, parts hanging from a motorcycle, loose
number plates, etc.
e. To provide for technical inspection of equipment used
by the riders, and to bar any equipment that does not
conform to standards.
f. To receive and decide all protests subject to appeal