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Avon Vintage Event 2017 – Bulletin #3 Scored Class Designations and Safety
 Moderated by: Kevin Gagne
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 Posted: Sat Jul 15th, 2017 10:12 pm
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S Kneisel

 

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Hi All,
A couple items before the bulletin:
The caterer is also offering a half price picnic option for kids under 9 years old. They can have a smaller chicken breast or a hot or hamburg if they choose as well as all the other yummy stuff that will be there. $6 at the concession stand.

There will also be a full practice on Thursday starting at 11:00AM for the extra $15. You will also be able to register early on Thursday starting at Noon.


Here is the 3rd bulletin regarding safety and class designations, please read carefully if you are attending:

Safety:
First off all karts must pass a VKA technical spec before being allowed on the track. Below are some high points of the inspection: For complete requirements, see VKA guidelines for 2017.

1) Karts must be generally track worthy and safe appearing to the inspector.

2) All fasteners in the steering and brake systems as well as all axle nuts must be safety wired or cotter pinned. This is a must.

3) Any outward facing oil clutch used on a rear or side engine kart must be equipped with a third bearing support OR a containment device which will prevent the clutch from getting loose from the kart in the event of a crankshaft breaking.
Here is the VKA guideline:
“A third bearing support or guard to contain the clutch in the event of crankshaft
breakage should be on all Rear and Sidewinder karts using an oil bath outboard
mounted clutch (toward the outside of the chassis). Construction of clutch guards
must be of a material equal to or greater in strength than .090” aluminum.”

4) All rear engine karts must run vintage tires (See VKA tire rules)

5) All sidewinder kart modern type tires must stay within VKA guidelines.

Scored Classes VKA guidelines (Taken directly from 2017 VKA Guidelines)

SINGLE REAR 6.1
Rear engine karts; American Fan cooled engines, 6.1 c.i. (100cc) max displacement; pipes and oil clutches allowed; no disc clutches; any carburetor combinations, vintage tires.
SINGLE REAR 8.2
Rear engine karts; American Fan cooled engines, 8.2 c.i. (135cc) max displacement; pipes and oil clutches allowed; no disc clutches; any carburetor combinations, vintage tires.
SINGLE 6.1 S/W AMER.
Sidewinder with American fan cooled engines, 6.1 c.i. (100cc) max displacement; engine clutches only; pipes allowed; modern tires allowed; one inch axle.

SINGLE 8.2 S/W AMER.
Sidewinder with American fan cooled engines, 8.2 c.i. (135cc) max displacement; engine clutches only; pipes allowed; modern tires allowed; one inch axle.
(Note: 100cc Foreign engines qualify for this class if using a 1979 and earlier kart with 1” axle)

Yamaha Piston Port ( First 3 places in this class will be checked for bore & stroke following the final heat)
Sidewinder karts (thru 1987) with single 100cc (KT100S), 1975 to present; piston port only; max. bore - 2.090”; max. stroke - 1.816” ; "stock appearing" - internal modifications allowed ; factory ignition system only (exception- “RVL” TCI replacement module OK); Walbro WB3A carburetor only; pipe allowed; Horstman DXL wet disc, Hartman, L & T wet disc, Burco, Max Torque clutches only (no modern clutches); Third bearing support required; 1” or 1¼” axle; modern tires; gasoline only. Max kart width of 50 inches.

Yamaha Limited ( First 3 places in this class will be checked for bore, stroke, carb & exhaust following the final heat)
Sidewinder karts (thru 1987) with single KT100s, piston-port engine, max bore – 2.090” – max stroke = 1.816” – WKA stock specification guidelines to apply; factory ignition systems only (exception- RLV TCI replacement module allowed);
Walbro WB3A carb with max 0.950” venturi; “limited” pipe (FY-Sr/K1/K2) at 12” minimum length (piston to start of first cone); Horstman DXL, Hartman, L+T, Burco, Max-Torque clutches only; no modern clutches; no direct drive or Tomar clutches; 3rd bearing support required; Max kart width of 50 inches.


The remaining Tier II classes will also be based loosely on VKA guidelines (see
VKA website 2017 VKA guidelines)

Tier II classes will be as follows:

Clinton & Round head West Bend
Historic Karts and engines up to 1964
Straight axle sidewinder
Sidewinder up to 1989 with any engine up to that year 1 ¼” axles OK in this class

Last edited on Mon Jul 17th, 2017 10:29 am by S Kneisel

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 Posted: Mon Jul 17th, 2017 10:29 am
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S Kneisel

 

Joined: Thu May 25th, 2017
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Please note:
We are only allowing American fan cooled engines in the 6.1 and 8.2 rear classes.
Sorry if I didn't catch that.
Scott

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