Engines and Components› Pistons and Piston Rings

BBR Motorsports

120cc Bore Piston Kit

$114.70

SKU: 411-HXR-1011

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The BBR Motorsports Piston Kit is a 120cc bore kit designed for the Honda XR100 and CRF100 motorcycles. This kit is compatible with Honda XR100 models from 1981 to the present and Honda CRF100 models from 2004 to the present.
Show original supplier description
The BBR Motorsports Piston Kit is engineered to increase the displacement of your Honda XR100 or CRF100 motorcycle to 120cc. This kit is specifically designed as a replacement piston for BBR's 120cc Big Bore Kit, enhancing your engine's performance and longevity. This piston kit is confirmed to fit the following Honda models: the CRF100 from 2004 to the present and the XR100 from 1981 to the present. It is a crucial component for upgrading your bike's power and responsiveness.

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

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandBBR Motorsports
Part Number411-HXR-1011
CategoryEngines and Components

We’re here — turning wrenches, just like you.

Call us, follow along, or come say hi.

(760) 282-4645 Instagram Google

Buy with Confidence

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.

View Full Return Policy

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.

View Full Shipping Policy