---
title: "Kikker Hardknock Bobber Kit: KH-III Build Guide & Examples"
slug: "hardknock-bobber"
description: "DOT/EPA-approved Kikker Hardknock kit takes 49cc to 250cc engines. Third-gen KH-III ships with universal wiring and bolt-on parts. Real builds, costs, and pitfalls."
pubDate: 2019-07-19T00:00:00.000Z
canonical: https://bobberbrothers.com/pages/hardknock-bobber/
---
## Kikker Hardknock Bobber: A Custom Motorcycle Builder's Dream

The Kikker Hardknock Bobber, introduced in 2006, quickly became a staple among custom motorcycle enthusiasts. With continual updates, the kit allows builders to create street-legal, personalized motorcycles that stand out in both design and performance.

![Kikker Hardknock Bobber custom kit](//cdn.shopify.com/s/files/1/1752/5351/files/kikker_hardknock_bobber_large.JPG?v=1537973404)

The Kikker Hardknock Bobber kit is famous for its ability to be tailored for larger engines, providing custom builders with the perfect platform. The frame was modified to fit a 250cc engine, making it an ideal option for enthusiasts seeking both performance and aesthetics in their builds. The inclusion of necessary legal modifications allowed it to meet street legality requirements in many regions, expanding its appeal.

![Kikker Hardknock Bobber frame and engine](//cdn.shopify.com/s/files/1/1752/5351/files/kikker_bobber_large.JPG?v=1537973427)

The integration of a larger frame that accommodates engines up to 250cc made the Hardknock Bobber a top choice for performance-focused builders. This versatility in engine options opened the door for greater customization, both in terms of power and style.

One of the most important features of the Hardknock Bobber kit is its ability to meet street-legal requirements in jurisdictions that permit DIY motorcycle building. It provides a comprehensive solution, ensuring all bikes built with the kit adhere to legal standards for road use.

![Kikker Hardknock Bobber custom build with large engine](//cdn.shopify.com/s/files/1/1752/5351/files/kikker_hardknock_large.JPG?v=1537973456)

As custom motorcycle culture evolved, the demand for bolt-on parts surged. The Kikker Hardknock Bobber kit addressed this by offering an array of customizable parts, from handlebars to wheels and even engines, enabling builders to personalize their creations further.

The KH-III Hardknock Bobber, the third generation of the kit, advanced the original design by incorporating more customization options while ensuring it remained street legal. Fully DOT and EPA-approved in the U.S. and compliant with EC-type approval in European countries, the KH-III continues to meet international regulatory standards.

![Kikker Hardknock Bobber third generation kit](//cdn.shopify.com/s/files/1/1752/5351/files/hardknock_large.JPG?v=1537973473)

With the KH-III model, builders can work with various engine configurations, from 49cc to 250cc single-cylinder engines. The universal wiring harness and removable engine mounts ensure that customization is easy, and the inclusion of factory bolt-on parts makes upgrades simple for both seasoned and new builders alike.

The Kikker Hardknock Bobber remains a go-to kit for motorcycle enthusiasts looking to build custom, street-legal bikes. Its adaptability, legal compliance, and vast range of customization options make it an ideal choice for creating truly unique motorcycles.

## Sources

- [Kikker 5150 Hardknock Bobber - Official Site](https://www.kikker5150.com/Hardknock.html) - Complete specifications, engine options, and kit details
- [Kikker 5150 Hardknock Bobber - European Model](https://www.kikker5150.com/Hardknock.e.html) - EC-type approval details and international compliance information
- [Hardknock Garage - Kikker 5150 Parts](https://hardknockgarage.com/) - Parts catalog and current model specifications

*Background reading: [what is a bobber motorcycle](/pages/what-is-a-bobber-motorcycle/) is our pillar guide on bobber geometry, the bobbed-fender origin story, and what separates a true bobber from a chopper.*

*Honest gear for honest builds: shop our [Built Not Bought collection](/collections/all/) - the line every garage rider in our community starts with.*

## Read More From the Brotherhood

- [MY17 Bonneville Bobber](/pages/my17-bonneville-bobber/)
- [Cafe Racer Motorcycle: History, Builds & Modern Bikes](/pages/cafe-racer-motorcycle/)
- [Remarkable Bobber Motorcycle Builds](/pages/11-remarkable-bobber-motorcycle-builds/)