Heavy Hitter 520 Primary Drive Conversion OEM/EBMX Ultra Motors

$119.89 USD
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Curious About Sizing?

Given the massive variety of clothing we carry, a standard sizing guide is incredibly helpful for customers seeking the best fit.

Please understand that surplus varies widely in fit and cut and this sizing chart is general advice rather than tailor-level fitting.

Nearly every military has different sizing charts and schemes, which is why we've taken the time to put together this brief tutorial.

 

Jacket & Shirt Sizing

In absence of an established military size chart, we measure each jacket or shirt from armpit to armpit to get a rough idea of how it fits. If a garment is between sizes, we mark it one size down. For example, if a shirt measures 19.75" from pit to pit, it is marked as a small rather than medium.

To measure pit to pit, close up your shirt or jacket and measure from armpit to armpit. 

This is our measurement guide that we use to measure garments without an existing military size chart:

14"-15" PtP = XXS

16-17" PtP = Extra Small

18"-19" PtP = Small

20-21" PtP = Medium

22-23" PtP = Large

24-25" PtP = Extra Large

26-27" PtP = XXL

28-29" PtP = 3XL

Pant Sizing

We typically convert pants to US waist and inseam sizes. If a pair of pants is between sizes, we mark it one size down. For example, if a pair of pants measures as a 33 waist, it is marked as a 32 waist.

To take these measurements we lay a pair of pants flat on the ground. We then measure across the waist and double the measurement. For example, if a pair of pants measures 16" across the waist it will fit a US 32 waist.

To determine inseam we measure from the crotch seam to the bottom of the cuff. For example, it a pair of pants measures 30" from the crotch seam to the bottom of the cuff we will list it as a 30 inseam or 30L.

Surplus Condition Guide

  1. Unissued
    1. These items are brand new. They may sometimes exhibit signs of storage. They may be new in their original factory packaging, but most times will not be. 
    1. Issued; Good / Issued
      1. These items are in issued/used condition but are fully functional. This grade of surplus item may also exhibit signs of use such as stampings, small stains or general dirtiness.
      2. Issued items will not have missing or broken buttons, zippers or be missing any functional components unless noted as such in the product description. Any items you purchase that are marked as "Issued; Good" but exhibit these defects will be replaced free of charge by Americana Pipedream.
      1. Grade 2
        1. These items are in issued/used condition but have defects that impede function. This may include missing buttons, broken zippers, holes and tears. They may also be missing components.
        2. This is the lowest grade of surplus item that we carry and they are not eligible for returns or exchanges due to condition.

      Prop 65 Warning

      All products that are NOT INTENDED FOR CONSUMPTION OR NOT FOOD PRODUCTS fall under this warning:

      “WARNING: This product contains a chemical known to the State of California to cause cancer.” WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.”

      Delivery and Shipping

      Americana Pipedream keeps its inventory on-hand and ships directly to you from our warehouse in Appleton, Wisconsin.

      We typically ship orders within 3-5 business days. During busy periods this can be 7-10 business days, sometimes longer. We are a small business and appreciate your patience.

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      This kit was designed for riders who want to maximize their bike's performance. As seen on EBMX FIM E-Xplorer race team bikes ridden by Jack Field & Jess Gardiner. This is the lightest kit on the market, which means less rotational mass, and resistance. 

      This kit consists of a hybrid sprocket setup, with the rear sprocket being a 7075 T6 Billet with anodized hard coating, and the front sprocket being a machined steel sprocket, heat treated, and counter cut for weight reduction. The chain provided is a Fire Power 520 non-o-ring chain made in Japan for the least amount of rotational resistance. 

      This primary drive is not a stealth riding kit. This kit is loud but no louder than your typical primary kit. If you're looking for something functional that has been heavily tested this is your kit!

      We do not vulcanize rubber onto our kits because of two simple reasons, Efficiency loss, additional heat & wear. Adding rubber rings on a sprocket will result in a small degree of elasticity which means a loss of power transfer, also reducing the directness of power transfer. The rubber sprocket rings will accelerate chain wear due to additional friction to chain links, and to also include you now have a shelf for debris to sit on for the chain to roll over to pack into the links since there is no place for debris to evacuate to.

      Note: Installation and detailed setup info HERE

      Features

      • Exclusive dished sprocket design for proper clearance
      • 520 non-sealed Japanese Chain included for long-term reliability and reduced rotating mass
      • 7075 aluminum design rear sprocket for reduced rotating mass
      • Lightweight Counter Cut Steel heat-treated front sprocket for added life and wear properties
      • Master link chain for easy chain swaps when it is time for maintenance

      Fitment

      Sur Ron Ultra Bee OEM Motor
      Sur Ron Ultra Bee EBMX V1 & V2 XUB-80 Motor

      Important Notice: For EBMX & OEM Motor ONLY! Some Aftermarket Motors may have an offset difference, check your chain alignment before riding, most aftermarket motors include shims for proper installation. 

      This is the known and tested compatibility for this product. Factory variations, dealer options, and aftermarket modifications could affect compatibility in specific cases. Please verify compatibility to the best of your ability before purchasing.

      Payment & Security

      Payment methods

      • American Express
      • Apple Pay
      • Diners Club
      • Discover
      • Google Pay
      • Mastercard
      • PayPal
      • Shop Pay
      • Visa

      Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

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