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Monday, 09 April 2012 11:44 |
All basic engine specifications and dimensions will be found in the current Mini ROK pdf as published on the Super karts USA website www.superkartsusa.com.
The intent of the class is to run the engine as produced. The specifications are available to determine any modifications, not to allow blueprinting. No deviation from the “as produced” engine is allowed. All components must remain OEM.
Additions/clarifications in this version are italicized and underlined. Deletions are lined out.
Any information published herein that conflicts will be considered the superior reference.
Bore: 42.10 maximum
Stroke: 43.00 mm +/‐.10mm
Rod length: 90mm +/‐.10mm
CC: Assembled 7.5 w/LAD tool using Marvel Mystery Oil
Squish minimum: .032”min (with .060” solder)
Ignition: Selettra
Cylinder: Mini ROK Cup only as per pdf
Carburetor: DellOrto PHBG 18mm
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Slide: #40
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Needle: W23
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Outer pilot: #60
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Inner pilot: #50
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Emulsion tube: 266AN
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Floats: 4gm
Maximum venturi size (no‐go): 18mm
The only allowed changes to the carburetor are main jet changes and needle clip position. Any other change or modification is not permitted.
Air Box: (1) 23mm tube(+/‐ 1mm) 2010 (silver) as supplied in kit with no modification except for the addition of an internal foam air cleaner which mounts in place of the stock boot. The original air box adapter must be used. No external modifications of any type including air scoops or heat retention additions
Full chain/clutch cover: such as OTK, KG or Tillett or billet clutch cover with chain cover strap.
Clutch: 2010 as per pdf. No modifications allowed.
Exhaust: As per pdf, modification or repair not allowed. Cracked or broken exhausts will be disqualified.
Mount pattern: 80mm X 102mm Same as Comer K80, Rotax and HPV/KPV
Tires: Two (2) sets One set of MG HZ 460 X 5 for competition sessions per weekend.
Bodywork: CIK, FIK or IKF/WKA style allowed. Must include front fairing, nose, side pods and rear protection. Front bumper (nose) maximum width 42” (1067mm). May not extend beyond front tires.
Chassis: Since SKUSA endeavors to accommodate competitors from all organizations whenever possible, the following chassis regulations will apply to all Cadet chassis.
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Minimum wheelbase 35” (889mm).
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Maximum axle diameter 40mm
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Maximum width 50” (1270mm)
Rear protection/bumper: CIK, FIK or IKF/WKA style allowed. Under no conditions may the rear protection extend beyond the plane of the rear tires.
Chest protection: All drivers in this class are required to wear a chest protector with SFI Section 20.1 Certificationduring any on‐track session. Failure to comply may result in disqualification.
Claiming: Any competitor may claim an engine entered in the event subject to the following conditions:
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Claimant must be entered in the race and have participated in at least two events in the class during the calendar year.
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Claimed engine must have cleared Technical Inspection for the event.
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Claimant must provide certified funds or cash in the amount of $3000.00 US$.
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Claimed engine will be delivered to the Claimant under the supervision of the event Technical Director and Race Director at the end of the event.
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Claimed engine will be complete, less engine mount and chain/clutch cover. Including:
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Engine and clutch
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Carburetor
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Exhaust system
Failure to deliver the claimed engine will result in forfeiture of all awards for the series. |
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Written by John Motley - National Technical Director
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Thursday, 02 February 2012 17:17 |
Recently we issued a revision to our rules regarding the use of cylinders for all Stock Honda classes. The intent of the new rule is similar to our TAG class rules where only one engine brand change per competition year is allowed.
After receiving input from competitors we decided to clarify the rule.
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Cylinders are defined by two groups regardless of the actual year of the cylinder. Either 1997-1999 (early) or 2000-2002 (late).
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If you have a damaged cylinder, you will not be allowed to change to the other cylinder group.
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Regional series are “stand alone.” Pro Tour -- the three race series including the SuperNationals -- is also to be considered “stand alone.” You select the cylinder group you wish to run at the first event of the series and continue to run that group for the remainder of the year.
Basically, we feel that the concept of having a certain cylinder type that might possibly be a few tenths faster at a given track, and the considerable expense and testing involved to determine that, is not a desirable situation for the majority of our competitors. We believe that the time, expense and effort would be better spent in getting the chassis right and improving the driver’s skill level.
Thank you for taking the time to comment on this issue.
JOHN MOTLEY
NATIONAL TECH DIRECTOR
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Wednesday, 01 February 2012 17:45 |
Note that the latest version of the Rulebook has adjustments to these sections:
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10.4.2.1 Helmets
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10.5.6.1 Protests
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20.2.7.1 Data Acquisition
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20.3.1.9.1 Engine Pre-Race Technical Procedures
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20.3.2.6.3 Cylinder Head
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20.3.2.6.11 S5 Restrictors
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30.2.4.2.2.3 Warm-Up/Formation Laps
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30.3.6.4 Double Waving Yellow Flags
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Tuesday, 24 January 2012 17:27 |
As announced prior to the 2011 Streets of Lancaster Grand Prix and Supernats 15, SKUSA has now gone to a new spec rain tire for the 2012 season and beyond. The original press release, along with additional information, can be found by clicking HERE.
Just as a courtesy reminder to all PKC and SKUSA racers, in the event that a 'rain race' is declared by the race director, the official spec 'rain' tire starting with the 2012 season is the new MG-WT "wet" tire ONLY (although the older MG-WZ rain tire will also be allowed). This means that Bridgestone tires are no longer accepted. Also as previously announced, SKUSA has inventoried an initial supply of the new MG-WT rain tires at an introductory price of $165 per set. As of the time of this post, there are approx. 20 sets left at the introductory price. Once this supply is gone, the tires will retail for $218/set+tax ($212 for TaG Cadets).
You can order your rain tires now through SKUSA's new online store by clicking HERE.
See you at the track! |
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Written by John Motley - National Technical Director
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Friday, 20 January 2012 13:01 |
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Effective 1/19/12 - There has been much discussion and debate regarding the various stock Honda cylinders allowed in SKUSA competition, and how they affect performance at different tracks.
In the interest of controlling racing costs, maintaining fairness and promoting uniformity between the various SKUSA series and regions across the US, each Stock Honda driver will now have to declare a cylinder at his/her first race of the season (for each SKUSA series), and then not vary this cylinder version for the rest of the season. For example, if a driver is running a ‘99 cylinder for ProKart Challenge at the Buttonwillow event on Feb. 11, the driver must run a 99 cylinder for the other 5 PKC races of the season. The cylinder will now be a tech item on the Pre-Tech Certification Form. |
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