Engines and Components› Oiling Systems

Koso North America

Oil Pump

$67.95

SKU: NF623000

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

It helps prevent engine failure and keeps the engine lubricated to optimize performance. This pump is recommended for upgraded engines, particularly when used with the Koso North America 170cc Big Bore kit and 4V cylinder head.
Show original supplier description
This high-volume oil pump is engineered to increase oil flow by a substantial 40%, which is a critical modification for preventing engine failure, especially in engines that have been upgraded. This oil pump is strongly recommended for motorcycles equipped with performance enhancements such as the Koso North America 170cc Big Bore kit and 4V cylinder head. By ensuring consistent and optimal lubrication, it helps maintain lower engine temperatures and maximizes performance, whether for casual riding or racing applications. The kit includes the aluminum super flow oil pump, outer rotor, inner rotor, and an axle pin. It is important to note that this high-flow oil pump does not fit 2022+ models. Koso North America explicitly states that this is an aftermarket part built for racing purposes only and is not responsible for any damages. Engine parts are not covered under warranty, including collateral damage or labor costs in cases of malfunction.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandKoso North America
Part NumberNF623000
CategoryEngines and Components

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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