The "NEW" Clone class

This is a very cheap, entry level FUN class for this year.  This is going to be an absolute BLAST of a class. This class is meant to bring the Fun back to karting an a budget.

• Chassis must be at least 5 years old
• No new tires are allowed
• 6.5 HP, 4cycle engine described below (available from Harbor Frieight for about $125-$150)
• 370lbs
• 4.5 YKC tires on the front and 6.0 on the rear
• Stock Motors, governers may be removed.
• Stock tuel tank removed and plastic tank located on floor pan used.
• $200 claimer rule on engine - which means that anybody that finishes the main event may purchase your engine and you must sell it!

More details (subject to change at any time):

Tentative Box Stock Rules Pending IKF Approval for 2010

List of Approved Engines

MFG: Jiang Dong - Lifan - Zongshen

MODELS: 6.5hp 196cc OHV Engine (168 Series)

COLORS: Red, Blue, Yellow, Black

Also re badged and sold under the following names;

BS (Box Stock)
Central Machinery
Northern Tools
Carroll Stream Motors
Greyhound
Baja
Blue Max

ENGINE SPECIFIC TECH SHEET FOR: BOX STOCK PROJECT 6.5 OVH
Description: Single cylinder, 2 valve, OHV 4 cycle
Important
Note: All parts must be Box Stock Project factory production parts
unless otherwise specified in this rules manual. No machining or
alteration of parts is allowed unless specifically noted. All parts
will be subject to a comparison to a know Box Stock part (when
performing a 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 in immediate disqualification of competitor along with
forfeiture of any points earned to date in class. Competitor will also
not be allowed to compete any longer in that 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 seats are two angles 45 degrees valve face and 30 degrees top
relief. Stock head bolts only, must have four. Head gasket maybe after
market, must be of stock configuration. No copper or aluminum gaskets
allowed. Stock exhaust system only with no modifications. Any stock
configuration gasket allowed no other sealer.
Bore and 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 .028” NO-GO.
Stock air cleaner assembly only.

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

Ignition system: Stock Box Stock system 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.

Piston and Rings: Must be unaltered Box Stock only. No machining of piston and rings allowed.

Connecting Rod: Stock Box Stock rod only. No machining of any type allowed. Stock rod bolts only.

Crankshaft Requirements:
Stock Box Stock crankshaft required. 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.
Max Intake lift on cam .225” taken at the pushrod.
Max Intake lift at the valve .238” Taken on valve spring retainer with zero lash.
******************************************
Max Exhaust lift on cam .232” taken at the pushrod.
Max Exhaust Lift at the valve .242” Taken on valve spring retainer with zero lash.
(Additional cam checks will likely be added later)
Special
note. Valve guide wear can give false valve lift readings when checking
off the front of the valve spring retainer. It is advised to take
readings at several other points around the retainer (back, and both
sides) if wear is suspected of giving a false, unfavorable reading.

Block Requirements:
Block must remain stock as produced. Stub for governor may be removed
and the hole plugged. No machining of block allowed. Welding to the
block shall be for rod damage repair only and may not constitute a
functional modification.

Carburetor/Fuel Tank Requirements: Floor Mounted fuel tank allowed
(stock tank to be removed). Pulse type fuel pump allowed. Fuel pump
must be pulsed from either the crank case or the valve cover. You may
install a flat metal plate in the original tank location for the
purpose of mounting the throttle linkage and fuel pump. Aftermarket air
filter adapter allowed (max length of 1.375). Main fuel jet may be
drilled to a no-go of .042 inch. Stock emulsion tube must be used and
unaltered.

Header and Muffler Requirements: Any single stage,
one piece header made from .750” O.D. steel tubing allowed with the BS
tube style muffler part # 89966 or it’s aftermarket equivalent(ex:
rotary power) installed at the end of pipe. The tube style muffler may
either be welded or tread fitted to the pipe end. The entire exhaust
pipe including the muffler is 14” max length and 10” min length.

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 adapter/air filter, top plate & fuel pump).

Kinsmen Club / Box Stock addition to the “Claimer Rule” above.

Claimer must state intention to claim, to track officials with money in hand within 5 minutes of end of the race.
If the "claimed engine" fails tech, or if any engine that is used on
competition day, fails tech due to cheating, not only will the engine
be confiscated and destroyed, the owner of said engine will be
suspended from participating in the next race.
A second cheater motor in the same season will result in
non-participation for the remainder of the season and loss of all
points. An engine claimer waiver is to be signed at each event by all clone class participants.
All clone class drivers must complete and sign the Kinsmen Kart Club
liability release / membership form, or other club’s form that the
Kinsmen Kart Club is competing at. By signing the official Kinsmen Kart
Club liability release / membership form, or other club’s form that the
Kinsmen Kart Club is competing at. The participant agrees to become
familiar with and abide by all rules, specifications and procedures as
set forth in this rulebook and prescribed subsequently by the Kinsmen
Kart Club, its affiliates, officers or designated representatives.