Test run for re-aligned classes at Bedrock................

tobias101

tobias101

Livin' the dream.........
After the meeting there was discussion on the Jr classes and how to get more in line with the rest of the karting world. I've read the WKA tech manual, searched the online forums and spoke to some different tracks. Here's what I've come up with and it pretty much mirrors Sangchris and Duquoin. I think the realignment will give new racers a chance to run up front and allow the "veteran" juniors to gain seat time in faster karts.


There will not be any clone /flathead mixing, except in rookie B. Way too many variables and haven't gotten a real good answer on how to make it work.

THIS IS NOT SET IN STONE...........YET!

Looking for constructive feedback from the Rookie and Jr. parents. A decision will be made by the end of Feb.

Bedrock Kart Classes 2012:

Rookie B (5-8 yrs. old) WKA .425 purple plate (250 lbs.) Pump gas only.
Clone engines allowed with a .375 ARC red restrictor plate (265). Pump gas only.

JR1 (8-10 yrs. old) WKA .425 purple plate (250 lbs.)

JR2 (10-12 yrs. old) WKA .500 turquoise plate (275 lbs.)

JR3 (12-15 yrs. old) WKA .575 gold plate (300 lbs.)

Light Briggs flathead (325 lbs.)

Medium Briggs flathead (350 lbs.)

Heavy Briggs flathead (375 lbs.)

JR 1 Clone (8-10 yrs. old) ARC .425 restrictor plate (265 lbs.)
Must run pump gas only 87-93 octane.

JR 2 Clone (10-12 yrs. old) ARC .550 restrictor plate (290 lbs.)
Must run pump gas only 87-93 octane.

JR 3 Clone (12-15 yrs. old) No restrictor (320 lbs.)
Must run pump gas only 87-93 octane.

Pro clone….Stock cam and CL1 cam ONLY

Outlaw…
Max displacement changed to 250cc for 2 strokes, correcting a typo from last year.
Any single cylinder motors are allowed….must follow displacement and weights established from 2011.
 
disappointing....

also where would a gx390 fall in the outlaw rules? It says over 400cc has to weigh 420, and up to 320cc has to weight 365. Pretty big hole there from 320cc-400cc.
 
OHV's from 321 to 399 cc's should be in category C, 390#. I believe that was another typo from last year. m

Here are the differences between Bedrock and AKRA 2012
Bedrock = Intake valve no larger than 0.985
AKRA = Intake valve no larger than 0.982

Bedrock = stock flywheel
AKRA = BSFW-1 steel billet flywheel allowed on 1/1/2012 and required by 7/1/2012

Bedrock cam = allows CL-1 cam and provides a +2 degrees of duration for cam lobe wear and gauge
variances
AKRA cam = no expressed acceptance of the CL-1 or variance for cam wear / gauge variances

Bedrock timing = what Mort posted
AKRA timing = non tech
 
you forgot the two big ones... non tech low speed jet and non tech timing. 2012 akra rules switched to this. Bedrock is .019 low speed max and 18* btdc max.

Not trying to argue, as i didn't go to the rules meeting (prior commitments). But those two deals make a big difference in HP, and my clone will be 100% AKRA 2012 legal. Its ok i saw finn might have a l0206, Might try and get that going instead of switching my clone back.
 
Mort...I'll pass it along to the powers that be and see where Bedrock will fall on the issue.

My vote will be to adjust Bedrock to match those two changes and to allow the steel aftermarket flywheel.




Added.......
I'd also drop the header rule in the box stock class. AKRA 2012 calls for the winnie muffler.
 
Any Dad's out there reading the proposed class structure?

I know it will split one of the biggest classes but I think it's better for the kids to progress into faster classes.
 
Sounds good toby... I agree with the small local changes that are allowed (billett aluminum flywheel and the open header rule) which 95% of the tracks in this area run. Most tracks I've seen are gonna follow the 2012 rules with those ammendums.
 
Please comment on the rules below. Bedrock will update clone rules to match Duquoin and surrounding tracks as closely as possible:

ENGINE SPECIFIC TECH SHEET FOR: BOX STOCK 6.5 OHV

Description: Single cylinder, 2 valve, OHV 4 cycle engine.

Combustion chamber volume: 26.5 cubic centimeter minimum, with piston at TDC,using prescribed procedure. The Liquid CC check is the official check (IF THE ENGINE FAILS THE CC LIQUID CHECK AT ANY TIME DURING THE TECH PROCEDURE IT MUST BE CALLED ILLEGAL)

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. 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. 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 no other sealer.

Block Requirements: Stock cylinder bore is 2.685” max. Stroke is 2.123” + .010” or - .005”. No piston pop out allowed. Matting surface finish of block and cylinder head is a non-tech item, surfacing of both to correct gasket failure and meet cc check allowed however, no piston pop out is allowed. May use 2 side cover gaskets of stock configuration. Block must remain stock as produced. Stub for governor may be removed and 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 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. Venturi .615” NO-GO. Rear carb bore .751” NO-GO. 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 max in bottom section and 20 holes max in top section. Minimum E-Tube length 1.092”. Throttle shaft - .115” minimum. Butterfly - .037” minimum. Aftermarket air filter adapter allowed (max length of 1.375).

Valve Train: Stock valve cover only with any stock configuration gasket, no sealer.
Factory stock rocker arms 1:1 ratio and push rods only. Stock valves only 45 degree
angle only both valves, Intake valve Max OD .985” +/- .005” and Exhaust valve Max OD .948” +/- .005”, no modifications allowed. Only Box Stock valve springs. (Installed Height for valve springs .815”, must be checked by using the .815” spring must go gauge with retainer seal in place on intake an exhaust valve if used.) Prescribed check procedure as follows – Remove valve spring, reinstall spring retainer, insert .815” must go gauge in spring location. Gauge must go in both locations Intake and Exhaust with any allowed retainers 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”. Lash cap on exhaust valve only. Valve stem seal allowed on Intake and Exhaust valve, maximum lip thickness of .027”. Minimum thickness of Intake retainer .230”, Exhaust retainer .250”. BS lifters only, no modifications allowed.

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 including plastic fins, non-adjustable billet steel flywheel or non-adjustable billet aluminum flywheel are allowed. No alterations of any type allowed. Timing and flywheel key is non-tech.

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”max - 1.168” min.

Camshaft Requirements: Stock camshaft cores only, ez-spin assy must remain as stock. Cam lobe base circle diameter .865" -.005”/+.010” Duration check for Intake and Exhaust lobes (taken off pushrod). Intake duration of 219 degrees at .050 lift/86 degrees at .200 lift.* Exhaust duration of 222 degrees at .050” lift/97 degrees at .200” lift.* (*+/- 2 degrees for wear and gauge variances) Max Intake lift on cam .225” – Min .215”lift 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” – Min .222” lift taken at the pushrod. Max Exhaust Lift at the valve .242” Taken on valve spring retainer with zero lash. (To achieve zero valve lash for checking running lift, preload dial indicator by .001”.)

Blower Housing Assembly: pull starter must be present and remain stock. Pull starter may be rotated for a better crank angle.

Header and Muffler Requirements: Open header rule (must run muffler/silencer.)

Silencer Requirements: You must run either the approved AKRA (box stock) header pipe and weiner type muffler (RLV 4117) or the WKA approved header pipe and muffler (RLV 8-91). No modifications to the mufflers.

Fuel Tank Requirements: Floor Mounted fuel tank mandatory (stock tank must be removed). Pulse type fuel pump allowed.

Fuel Pump Requirements: 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.

Clutches: Open clutch rule.

Claimer Rule: You must finish the race in the box stock class to purchase the winners engine for $300 or $400 if the billet flywheel is included (minus the clutch/chain guard/throttle kit, header pipe/muffler, air filter adaptor/air filter, top plate & fuel pump).
 
A couple things I see:
-last year you allowed disc clutches. Duquoin also allows them in the adult classes.

-The muffler listed is the mini muffler for the wiener pipe, the muffler most people run is the 8-91 with the round holes.

-The header rule could be worded to read a little different so people don't think you can run without a muffler.
 
Last year you allowed billet aluminum flywheels, but I don't see that above. DuQuoin also allows them. That was $100 purchase last year and if it is left to be as written above, we will have to buy a new steel one for $60 this year. I know we are gonna have to get them anyway by July, but we should be able to run the aluminum flywheels as well.
Jmo
 
I apologize for not attending the meeting as I had prior obligations as well. I am not arguing the above rules, however, I have a few suggestions and want to see how other people feel.

I would just the 2012 AKRA rules exactly along with the local options of flywheel, clutch and header. The clutch and header rule is already open and I would keep this. I would also like the flywheel rule to be open to all non adjustable flywheels. I know of quite a few people that have the ARC Billet aluminums currently and these were legal last year at Bedrock. My issue with the stock flywheels is that they are dangerous. I have heard stories of these coming apart on the track and on dynos. I also heard that the Billet STEEL flywheels are not available yet? Anyway, that is my take on the flywheels. Thoughts/comments?
 
Justin/Tobi,

I also had a commitment on the day of the rules meeting, so my apologies too.

My vote is to also invoke the 2012 AKRA rules with the following “local options”:
· Open clutch rule
· Open header rule
· Flywheels limited to: stock (shouldn’t be allowed due to current RPM levels - safety issue), non-adjustable billet steel (whenever they show-up from China), non-adjustable billet aluminum (ARC, Raceseng – buy American today!)

In regard to camshafts, I don’t understand limiting to the stock cam or the Dyno CL1 grind. As written, the AKRA rules outline the profile limits of the cam but do not restrict who it is ground by. If you access Dyno’s website, they have 2 versions of the CL1 grind and a CL1-M grind – all box stock legal. Not to mention that Dover, Box Stock Project, and others have legal grinds too. The clone cams have gone down the same path as the Flatheads…

With respect to the claim rule, I do not feel that a $200.00 claim is appropriate for a Pro-Clone class. I also don’t believe there are very many clones being home built anymore. In my opinion, $300 should be the minimum claim amount.

Bedrock certainly experienced a great growth in the Clone classes last year, I would hate to see it decline because of an unpopular rules package. Remember the kart count and great racing for the Frank Anderson Classic – it was an awesome event!

Just my 2 cents…

Scott Meier (the old man that helps Jon Friederich)
 
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