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Speed Karts Black Restrictor Plate – WKA Legal for Clone Box Stock (.400")
Engineered for serious racers, the Black Restrictor Plate from Speed Karts is designed to meet WKA specifications for Clone Box Stock classes. Featuring a .400" bore, this precision-machined restrictor plate ensures consistent airflow and top-tier performance, all while staying within the rules.
Constructed from high-quality aluminum and hard anodized in a sleek black finish, it offers excellent durability and resistance to wear, even in high-heat, high-vibration racing conditions.
Specifically designed for the 196cc Clone Box Stock engine. For other engine platforms such as Predator 212 Box Stock, please consult your local track’s class structure and rulebook to confirm legality.
Key Features:
- WKA legal restrictor for Clone Box Stock (.400" bore)
- Durable, hard-anodized black finish
- Designed for 196cc Clone or similar engines
- CNC-machined for precision and reliability
When performance, durability, and rule compliance matter, Speed Karts delivers.
WKA Rules:
Effective March 1st, 2025, After a thorough review of track variations and the ease of adjusting restrictor plates in the Junior Divisions, WKA has announced updates to the available restrictor plate options. Beginning March 1st, for Junior 1, the Black .400 and the Junior 2 Yellow .475 plates will be offered as promoter’s options, with WKA officially approving all five plates for use under its sanctioning. Promoters and tracks are encouraged to prioritize safety when selecting the appropriate restrictor plate for their events, ensuring the best choice for all participants. Plate Options: Rookie/Red - Future Stars: ** Red .375 (Junior 1 ** Green .425 Black .400) (Junior 2: ** Purple .500 Yellow .475) Junior 3: ** Blue .550
Returns- Returns must be communicated by customers within 7 days of delivery and sent back within 30 days to receive a refund. No returns without authorization will be accepted. All returns must be accompanied by a copy of the receipt and a note. All items must be returned complete and in new condition.
All returns are subjected to 20% processing and restocking charge after the product has been inspected. The shipping cost will not be refunded.
Refunds will be made back to the same method of payment when ordering those parts. We will not refund a different method of payment.
Non-returnable Items Include- Close Outs and Clearance Items, Special Orders, Custom Orders, Used Parts, and Cut to Length Items. (Other items may apply)
Shipping: All orders are shipped UPS Ground, UPS Surepost or USPS Priority when ordering online. Shipping charges are calculated based on weight, size, and quantity of boxes in addition to processing and handling including insurance. All shipping charges are the customer's responsibility (even if charges online are not the same as emailed or phone orders).
All standard shipping orders will be shipped within a day or two on weekdays. Orders placed on the weekend (Fri-Sun) will be shipped Monday or Tuesday or the first weekday after a holiday. Custom or Handbuilt Products may require more time to be built before shipping. For any reason, an order may be delayed or prevented you will be contacted through phone and/or email.
Express/2nd Day/Next Day Shipments: Express orders must be made by phone orders only! Orders placed after 12:00 p.m. CST. will be processed the Next Business Day. UPS will only guarantee next day shipment. If you choose 2nd-day shipments expecting it before the weekend, UPS does not guarantee its arrival
Additional Fees: Double Check that the address you gave is correct. You may be charged additional fees to redirect your package to the correct address.
PO Boxes: We can ship to PO Boxes using USPS. However, UPS will only accept shipments to a valid street address. They do not deliver to P.O. Boxes.
International Shipping: International buyers are responsible for paying duties, taxes, and applicable customs brokerage fees separate from the merchandise cost. Buyers will generally pay these fees upon receipt of your shipment. Buyers may be charged additional fees once they receive the package. Read our international policy here.
Paypal: All orders paid by a verified PayPal account will be shipped to the address on the Paypal account to comply with Paypal's policy. No Exceptions.
UPS Estimated Shipping Lead Times
USPS Estimated Shipping Lead Times
