CS-1 Cafe Racer

For it's 10th anniversary, the legendary CS-1 Cafe Racer gets a fresh new look.


Featuring all of the style and innovation that made the original a smash hit, the updated CS-1X will be available as a limited edition kit with new custom parts, finish options, and technology. Every detail will be unveiled during the build process, so be sure to subscribe to the newsletter and follow the project on Facebook and Instagram!  

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About the CS-1 Cafe Racer

The CS-1 is a 650cc, air-cooled, single cylinder cafe racer designed to be lightweight, reliable, and fuel efficient for urban commuting. The engine and chassis components are sourced from the unsung hero of the thumper world: the venerable Suzuki S40. You can build your own CS-1 with a custom kit available from RYCA.

The bike was designed by Casey Stevenson in Los Angeles. Formerly a NASA engineer, he traded a super cushy desk job for the chance to build motorcycles. Here's what he says about the bike:

"I was in the market for a new motorcycle and wanted a lightweight thumper to get around the streets of L.A. I quickly discovered the lack of available options, so I started working on a new design. I was imagining a motorcycle with a Japanese engine and classic cafe styling, but more sleek and modern than the single cylinder customs based on old bikes that are popular at the moment.

I discovered my ultimate thumper cafe racer hidden inside a bike known as the Suzuki S40 (aka the Savage). They have been around for over 20 years and are still available brand new. The custom parts and accessories were designed to avoid any major modifications to the frame or engine, which allows anyone with basic tools to build their own bike from kit components. The end result is a machine that is simple, fun, and affordable."


  • 650cc air-cooled, SOHC, single-cylinder engine. Strong low-end power and torque.
  • 5-speed transmission.
  • Up to 60 miles per gallon.
  • Electric start.
  • Belt drive. Quiet, durable, simple to adjust and clean.
  • Hydraulic front disc brake / rear drum.
  • Weight: 320 lbs
  • Wheelbase: 57"
  • Seat height: 31"
  • Rake and trail: 29 degrees / 4.75"

CS-1 Cafe Racer Kit

Build your own custom motorcycle with a RYCA CS-1 Cafe Racer Kit. The bolt-on parts are designed specifically for the Suzuki S40 / Savage. Since no welding or fabrication is required, the project can be completed with basic tools and skills.

    You can build a cafe racer, bobber, scrambler, and more. All the custom parts bolt on with no welding or fabrication required. Customize your options, add accessories, and calculate the price of your kit.
    RYCA kits work with all year models. The Suzuki S40 (aka Savage or LS650) is inexpensive and easy to find new or used. It's classic 650cc single engine features electric start, great fuel economy, and easy maintenance.
    60 lbs of weight is removed (and can be sold). The simple chassis of an S40 is the perfect starting point for your custom bike. There's no need to remove the engine, and none of the required frame cuts compromise structural integrity.
    You can complete your project with basic tools and skills. Video guides of the installation process will help you as your project progresses. The transformation is striking -- it takes about a week and no one will believe you started with a Suzuki S40.
    ...and be prepared for a few questions. Sure, it will turn some heads. But it's also a blast on the road. A RYCA is a simple, fun, and affordable bike that gives you a hands-on experience with the machine you ride.

Get started! Click here to configure your RYCA Kit.


What comes in the kit? Do I need to purchase anything else to complete my bike?
The CS-1 Kit includes everything you will need to transform your Suzuki S40 / Savage into a CS-1 Cafe Racer.

How long will it take to receive my kit?
Unless there is a back order on parts, kits ship out within 3 to 6 weeks AFTER we receive your tank and rear wheel hub for modification. If you do not already have a donor bike, we recommend placing a pre-order deposit to reserve your kit.

What years of Suzuki S40/Savage/LS650 will your kit work with?
Since the chassis stayed the same from year to year, our kit will fit ALL models.

What is the swingarm mod?
The swingarm mod makes it possible to use taller rear tires, including the vintage Firestone Deluxe Champions. A section of the swingarm brace is cut out, and a new piece is fabricated and re-welded. All the extraneous tabs are removed and shaved down. The entire swingarm is then re-painted and cleared. This eliminates the clearance issues of tires over 26" in diameter (see below).

Why can't I order my kit with the parts already painted?
1. The paint is easily damaged in shipping.  2. You'll want to do some test fitting of your unpainted kit parts before final assembly. It's much easier without worrying about scratching new paint.  3. You can have your parts painted locally for a better price than we could paint them for you.  4. Having your paint done locally allows you to see the actual color in person, color match your parts correctly, and have a custom paint job done to your specs. Check out the Customer Builds section of the website to get some ideas.

I want to choose my own tires. Can I get the kit without the rear tire?
Yes, just be careful with your choice of rear tire. Anything over 26" in diameter will come extremely close to hitting the stock swingarm.

Do I receive my original parts back (tank and hub)?
Yes. If your tank has damage and you're ordering a primered kit, please send a few photos to us to make sure we can work with it. Most dents and dings are not a problem, but we must add $50 to your kit price to cover the cost of the repairs. [Note: If you cannot supply a tank and hub for your kit, let us know and we can source the parts for an additional charge.]

Is documentation included in the kit?
Yes. Build guides, videos, and tech support are provided. The build guides can be found in the Resources section of the website. Instructional videos are posted on our YouTube Channel. Please email for tech support.

Do you change the rake angle?
Not directly. The rake angle is reduced by installing longer shocks on the rear and lowering the front by shortening the forks. No modifications are made to the headstock.

Does the price include shipping?
No. Please contact us for a shipping quote. Shipping costs within the U.S. are typically between $75 and $140 depending on options.

Can you ship internationally?
Yes. International customers are responsible for all shipping costs, duty/tariff fees, and import taxes. Please contact us for a shipping quote.

Is the 18" front wheel required?
No. You can use the stock 19" front wheel of your Suzuki S40 / Savage.

What is the seat height?
The seat height is 31 inches with the stock 19" front wheel. Less if you use the optional 18" front wheel.

What is the capacity of the modified fuel tank?
2.5 gallons (The stock tank is 2.8 gallons).

What is the decompression lever?
The optional decompression lever allows you to open the exhaust valves very slightly upon starting the engine and replaces the bulky and heavy stock decompression solenoid. It's not required, but it makes the engine a little easier to start sometimes. Available as a foot actuated linkage or thumb lever.

What tools do I need?
Other than a basic set of hand tools, an angle grinder is highly recommended for the frame cuts. A Dremel tool will also work, or even a hacksaw if you want to keep it super old school. But an angle grinder is ideal, allowing you to easily cut through the frame and smooth out the edges with a flapper disk afterwards. A basic motorcycle lift (shown below) is also recommended and can be used in the future for maintenance, etc. Here's a list of recommended tools and supplies.

Do you offer bulk/dealer discounts?
Yes, contact us for details.

Are there any performance upgrades?
Re-jetting your carb is a very simple procedure and will improve performance. A Jet Set is included with the kit. Suspension and brake line upgrades are also available.