Clone Updates for 2014

What engine parts do we need to update or change for 2014. And will 2013 motors pass tech in 2014 in the clone stock class?
 

Devil-D-Dawg

New member
I saw some guy whining about honda parts - what is the story? I have always run honda and I have never failed tech. Are folks saying you can't run honda or you can?
 
I don't think you can run a Honda or even a Honda part in a Clone class legally, but if you run a open class I guess you can run anything you want.... no problem. jmo
 

W5R

New member
I saw some guy whining about honda parts - what is the story? I have always run honda and I have never failed tech. Are folks saying you can't run honda or you can?

your running honda in box stock or clone classes? if so, wherever you race has got to have horrible tech lol
 

naz53

New member
is the link above also what the AKRA rules are for clones also? I am new to karting & the rules between Box Stock Project I hear about & AKRA seems confusing, I thought I heard AKRA was now going to big pipes & open clutches? Then I see some rules that have mixes of. I just want to know if a track says they follow AKRA or Box Stock Project what is allowed for each. Thank you & just trying to understand, do not want to buy something I do need or something that will not be legal.
 

XXX#40

2A supporter
is the link above also what the AKRA rules are for clones also? I am new to karting & the rules between Box Stock Project I hear about & AKRA seems confusing, I thought I heard AKRA was now going to big pipes & open clutches? Then I see some rules that have mixes of. I just want to know if a track says they follow AKRA or Box Stock Project what is allowed for each. Thank you & just trying to understand, do not want to buy something I do need or something that will not be legal.
Box Stock is a class under AKRA rule's, Box stock project was a set of rules in the beginning wrote by Jimmy Simm's(& others) Mr Simm's is the importer of "The Box Stock Project" Engines, his rule set is no longer used it is now AKRA rules at 95% of the tracks on the East coast.
There are 2 forms of Box Stock rules in AKRA both are the same main engine rules the difference being one class runs the small spec pipe and muffler, the other a Pro clone class which runs the large pipe rules.
Ultimately you need to check with the track your going to race at and see what rules they run.
AKRA 2014 rule books will be on sale pretty soon, that is the only way to get a complete set of rules
 

DynoDon

Moderator
Box Stock is a class under AKRA rule's, Box stock project was a set of rules in the beginning wrote by Jimmy Simm's(& others) Mr Simm's is the importer of "The Box Stock Project" Engines, his rule set is no longer used it is now AKRA rules at 95% of the tracks on the East coast.
There are 2 forms of Box Stock rules in AKRA both are the same main engine rules the difference being one class runs the small spec pipe and muffler, the other a Pro clone class which runs the large pipe rules.
Ultimately you need to check with the track your going to race at and see what rules they run.
AKRA 2014 rule books will be on sale pretty soon, that is the only way to get a complete set of rules

Excellent explanation Thank You
 

naz53

New member
Yes, thank you that helps out greatly. I know I need to see what my track will specify I just wasn't sure where to look for what they specified lol. Originally clones were listed as Box Stock Project & then they said clones followed AKRA. That is where I got confused, thank you again, we have been running flatheads but looking to change to clones so I want to try know what I needed to be getting. Thanks & Happy Holidays!
 

W5R

New member
Im sure someone here has a copy of the 2013 rules, then you can use those and just add the 2014 updates with them, which are posted on this site somewhere
 

W5R

New member
Here You Go.......

RLV B91 series silencers are the only approved 4-cycle silencers. Silencer must be stock,
unaltered as delivered by RLV. All B91 series silencers, outside diameter 2.240 inch
maximum. All B91 silencers must exit aft of the fuel tank and forward of the rear
bumper. All exhaust systems must be constructed in a manner that directs all exhaust
gasses away from the driver and towards the rear of the kart. New RLV B91 silencers with safety cable attachment device allowed, Note: all B91 silencers must be so equipped with safety device by January 1, 2016. Add-on safety devices will also be allowed.

Page 48:

Important Note: All parts must be Box Stock 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 "stock part" comparison check it is recommended to use a + /- .005” tolerance). Tumbling of engine parts is strickly prohibited. Engine will be teched as raced. There will also be a $200 claiming rule in place for this engine or $350 if engine has billet flywheel installed (Track or Series Option).
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.

Cylinder Head Requirements: Must be OEM casting only. Porting and / or grinding are not permitted. Valve seats may have up to three angles, 45 degrees valve face and 30 degrees top relief and 60 degree bottom relief. Intake seat maximum ID .897”, Exhaust seat maximum ID .862”. Outside face of valve may not be below floor of combustion chamber (i.e. don’t sink the valves). Stock head bolts only, must have four. Head gasket/s maybe after market, must be of stock configuration, gasket thickness is a non tech item, sealer allowed to insure proper seal. Depth check between the valves, front to back and side to side may not vary by more than .005” max. No copper or aluminum gaskets allowed. Any stock configuration exhaust gasket allowed, sealer permitted, Header may also be run without gasket, sealer only. Allen head bolts permitted on Header to head.

Block Requirements: Oil drain hole between lifters .251” no go. Any type side cover fastener and lock washer permitted, must be original size, sealer permitted.

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 area must remain as cast). Venturi .615” NO-GO. Venturi maybe machined to spec, no polishing permitted and all transitions must remain stock in and out of venturi. Rear carb bore .751” NO-GO. Carb bore at rear of carb .750” maximum depth (This measurement is taken from the flat surface on the rear of the carb down to the circular ridge at venturi edge). Main fuel jet .042” NO-GO. Low speed idle jet is a Non Tech item. Stock emulsion tube must be used and unaltered, .066’ max ID (no pass through). Side holes in E-Tube 4 holes in bottom section and 20 holes in top section max. Minimum E-Tube length 1.092”. Side holes in e-tube diameter .036” no go. Throttle shaft - .115” minimum. Stop arm of throttle shaft maybe filed to adjust for butterfly position. Butterfly - .037” minimum. Aftermarket air filter adapter allowed (max length of 1.375). Black Phenolic spacer must be flat across entire gasket mating surface with a minimum thichness on gasket surface of .265”. Deburring of inlet track allowed to remove flashing . Any attempt of inducting air into the intake port other than through the carburetor bore is not allowed. Surface finish of phenolic spacer inlet track, non tech..



Page 48-49:

Valve Train: Stock valve cover only with any stock configuration gasket, sealer allowed.
Factory stock rocker arms 1:1 ratio and push rods only. Surface finish of contact area of rocker arm to valve
stem , non tech, to adjust for proper lift running lift. Stock steel/stainless nitrate coated valves only 45 degree angle only both
valves with a minimum weight of 21 grams each valve, Intake valve Max OD .982” +/- .005” and Exhaust valve Max OD
.945” +/- .005”, no modifications allowed. Single valve springs only. (Installed Height for valve
springs .815”, must be checked by using the .815” spring must go gauge with retainer seal
and shims in place on intake an exhaust valve if used.) Shims may be used to achieve .815” Installed height, maximum thickness of shims used .045”, any combination of valve seal and spring shims allowed. Prescribed check procedure as follows – Remove valve spring, reinstall spring retainer and shims, insert .815” must go gauge in spring location. Gauge must go in both locations Intake and Exhaust with any allowed retainers and shims in place, as raced, during check procedure. Max wire diameter on spring wire is .071” with a maximum tension of 10.8 lbs. at a height of .850”, and a maximum tension of 18 lbs at
.650”. Each spring is to be checked using a
.750”height by .800”width plate gauge and a .250” (square) no-go gauge to check the

center spacing of the spring coils while inserted in the plate gauge. Prescribed check
procedure as follows – Insert the spring in the .750” X .800” plate gauge (spring must be
centered in plate gauge and must fit inside of gauge with the ends of the spring wires
perpendicular to the plate ). Once inserted in the plate gauge take the .250” no-go gage
and check the center coil spacing on both sides. The .250” no-go gauge must be parallel
to the spring wire and perpendicular to the center of the spring when checking. The .250”
no-go must pass check on at least one side of the spring. This check is to be performed
after the 10.8/lb , 18/lb check, and .071 max wire diameter check have been performed.
Ends of the valve springs may be sanded to help meet spring checks. Lash cap on exhaust
valve only. Valve stem seal allowed on Intake and Exhaust valve. Minimum thickness of Intake retainer .225” , Exhaust retainer .245”. BS lifters only, no
modifications allowed. Over-all length of push rod 5.285” max. Weight check lifters 18 grams min and push rods 9 grams min.

Page 49:

Piston and Rings: Piston must be unaltered Box Stock only. Overall piston length 1.935” max, 1.920” min and from top of wrist pin to top of piston .580” max. Arrow on
top of piston must be pointed toward valves/lifters. Overall length wrist pin 2.100” min, inside diameter .550” max.
Top ring and middle ring .115” max width, .060” max thickness.) Filing of ring end gaps permitted including oil
expander, max end gap .040”(top 2 rings only). Lapping of rings permitted for proper seal. Piston ring must be in one
piece(unbroken) when presented for tech. Piston rings must be self supporting in cylinder bore and concentric to
cylinder bore. Oil ring assembly must be self supporting in cylinder bore when checked installed on piston
with connecting rod attached.

Connecting Rod: New stock performance CAST rod allowed. Length from top of journal to bottom of wrist pin hole 2.375 max. and 2.350 Min. Honing of journal end and wrist pin hole permitted. Surfaces to remain flat.
Oil hole size : .173 no go

Page 50:

Header and Muffler Requirements: Any single stage, one-piece header made from .750”
OD steel tubing, with the RLV Mini B-91 Silencer installed at the end of pipe. The B-91
Silencer must be tread fitted to the pipe end. The entire exhaust pipe including the muffler
is 15” max length and 10” min length. Exhaust Pipe must be double nutted or safety wired
and silencer must be supported by clamped on brace to secure it in place. Pro Box Stock header length 16 ½” min and 20 ½” max (measured on inside of pipe with ¼” steel tape). Sealer may be used to assist gasket seal. Header may also be run without gasket, sealer only.

Here are the AKRA 2014 Rules that are going to the printer. As in the past, if there are any changes that must be made, AKRA will take a look at them and make a decision on it. Any changes that should be made will be submitted to the steering committee that AKRA is going to select at the Charlotte Show in January. As in the past, if there is a change, you the karter will be notified here on Bob's. AKRA would like to say a big "Thank You" to all of you have given input to the changes for 2014. AKRA and myself are looking forward to meeting as many of you as possible at Charlotte. Again, Thank You
 

jhawk

Member
Everyone is referencing AKRA rules but if you race at a track in 2014 that has NKA rules the cylinder head could be wrong. There will be a depth measurement on the head and not cc.
 
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