Up for sale is an ultra-rare, 100% Brand New Old Stock (NOS) Genuine Made in Japan 6V Voltage Regulator / Voltage Limiter Assembly manufactured by Kokusan Denki Co., Ltd. (Model RD1102, Kawasaki OEM Part Number 21066-028).
Engineered for vintage 6-Volt AC lighting circuits, this original regulator controls excess voltage at higher RPMs, preventing headlight and tail light bulbs from blowing out on vintage Japanese 2-stroke motorcycles. Manufactured in Japan to strict factory standards, it ensures stable electrical performance and period-correct reliability.
CRITICAL BUYER NOTICE: 100% GENUINE OEM NOS JAPAN100% GENUINE VINTAGE OEM MANUFACTURE: Authentic original Japanese Kokusan Denki factory production—NOT an inferior low-grade modern aftermarket recasting or reproduction.
UNINSTALLED VINTAGE CONDITION: 100% unused and uninstalled inventory. Preserved under dry storage for decades; minor handling shelf marks or light cosmetic storage patina on the bracket/wiring may be present as expected with authentic vintage NOS parts.
MANDATORY PHYSICAL & WIRING CHECK: Electrical components vary across specific production years and series. Please inspect all high-resolution listing photographs, verify wire harness configuration, bullet connectors, and mounting hole spacing against your original regulator before ordering.
Condition Note (100% Genuine Japan NOS)Manufacturer / Origin: Kokusan Denki Co., Ltd. / Made in Japan (Kawasaki OEM).Material / Construction: Metal mounting bracket, sealed electrical module, original wire lead.Physical State: 100% Brand New Old Stock (Never Installed). Wire insulation and metal contacts are clean and undamaged.
The Story Behind the PartThis original Made in Japan 6V Voltage Regulator / Limiter is part of a special purchase from a legendary 55-year-old vintage motorcycle shop that recently closed down. The iconic owner of the shop sadly passed away last year at the age of 92, leaving behind an untouched, time-capsule treasure trove of automotive and motorcycle inventory. Each item recovered from this historic collection has been preserved under dry storage for decades!
Technical Installation Disclaimer & Buyer Verification NoticeThis is a vintage / OEM replacement motorcycle electrical component. MANDATORY BUYER VERIFICATION: The buyer is strictly required to physically inspect all high-resolution listing photographs, verify all physical wire lead lengths and terminal pins, check mounting hole spacing, and cross-reference the OEM part number against their motorcycle's official parts manual or existing component prior to completing the purchase. We assume NO responsibility or liability for fitment mismatches, incorrect item selection, or electrical damage resulting from improper installation after the purchase is finalized. Final verification of technical compatibility, wiring setup, and safe installation remains the sole responsibility of the buyer.- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -"IMPORTANT - PLEASE READ BEFORE BUYING:"- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
If you need any measurements, additional photos, or information, please contact me BEFORE placing an order. double-check the part number, photos, and specifications to ensure this part is the correct fit for your specific year and model. Vintage motorcycles often have mid-year production changes. We are providing 100% Genuine NOS / Aftermarket parts as described, but the ultimate fitment responsibility lies with the buyer. We will not be held responsible for incorrect fitment or compatibility issues once the item is shipped. No returns or refunds for buyers error.
SHIPPING NOTICE:Please note that international shipping to India is currently NOT available from Pakistan due to courier and regional restrictions. We apologize for any ensure safe and professional packaging, we ship within 5 to 6 business days after receiving cleared payment. please allow 12 to 24 business days for delivery depending on your country's customs. If you need it urgently via DHL & Others (3-5 days), please message us before buying for an additional price quote.
CUSTOMS, DUTIES & TAXES:Import duties, taxes, and customs charges are NOT included in the item price or shipping cost. These charges are the buyer's sole responsibility. Please check with your country's customs office to determine what these additional costs will be prior to buying. We will not be responsible for any delays or costs caused by your country's customs department.
IMPORTANT SHIPPING & EXPRESS COURIER POLICYPlease note that our Standard Shipping is handled via the international postal network (Registered Mail Service), which does NOT charge any remote area surcharges. If your order is shipped via standard post, no extra delivery fees will ever apply.
However, if you request or upgrade your order to Express Shipping via Premium Private Couriers (DHL, FedEx, or UPS), please be highly advised that these carriers charge a significant, mandatory Extended/Remote Area Surcharge for deliveries routed to specific rural zip codes, islands, or remote territories.
If Express Shipping (DHL/FedEx/UPS) is utilized and your address is officially flagged as a Remote Area by the courier database:
The buyer is strictly responsible for covering the exact additional remote surcharge fee required by the carrier. This handling surcharge must be paid in addition to the shipping payment already processed.
Alternatively, the buyer may provide an updated shipping address located within a major, non-remote city center to completely avoid this extra private courier fee.
We reserve the right to cancel the transaction and issue a full, immediate refund if the combined express courier costs exceed the overall value of the item.
Note for Express Shipping Buyers: If you reside outside a major metropolitan hub and require premium express delivery, please message us with your exact Zip Code / Postcode before purchasing so we can run a courier pre-check and verify the final costs Regulator, 6V Limiter, Kawasaki KE250 Part, S1 Mach Regulator, S2 Mach Part, Kokusan Denki RD1102, 21066-028, Vintage Japanese Electrical, CategoryAutoParts.
