Fuel Enzyme Treatment & Stabilizer
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Description
Fuel Enzyme Treatment & Stabilizer – Multi-Engine Fuel Additive (16 fl oz)
Clean, Protect & Stabilize Your Fuel System for Peak Performance
The Fuel Enzyme Treatment & Stabilizer is a powerful, all-in-one fuel additive engineered to clean, protect, and optimize your motorcycle or powersports engine. Safe for all 2-stroke and 4-stroke gas engines, this advanced enzyme-based formula removes harmful gums, varnish, and carbon buildup from carburetors and injectors while improving overall performance and fuel economy. It also stabilizes gasoline for up to two years, prevents phase separation, and restores lost power in high-performance Harley-Davidson and off-road engines alike.
Key Features
- Safe for all 2-cycle and 4-cycle gas engines — ideal for Harley-Davidson, UTV, ATV, and watercraft
- Eliminates carbon, varnish, and gum deposits from injectors and carburetors
- Improves throttle response, fuel efficiency, and engine reliability
- Removes moisture to prevent phase separation in ethanol-blended fuels
- Stabilizes gasoline for up to 2 years for long-term storage or seasonal use
- Each ounce treats up to 16 gallons of fuel — highly efficient formula
- Cannot be overdosed — safe and easy to use for all gas-powered applications
Performance & Fitment
Perfect for Harley-Davidson performance Harley-Davidson models of all kinds, as well as UTV, ATV, snow, and watercraft engines, the Fuel Enzyme Treatment & Stabilizer ensures consistent performance and reliability across every ride. Whether maintaining your garage-built M8 or your off-road machine, this additive delivers smoother starts, improved combustion, and cleaner internals. Trusted by Nowaskey Performance and Hofmann Designs enthusiasts alike, it’s the ideal choice for riders who want to protect their investment and keep their machines running at their best year-round.
Container Size: 473 ml / 16 US fl oz
Type: Enzyme Fuel Additive
Application: 4-Stroke / 2-Stroke
Packaging: 12 per case (sold individually)
Units: Each
Weight: 1.01 lbs
Dimensions (L x W x H): 8.85" x 5.03" x 3.62"
Fitment
- Fits Harley-Davidson Softail Models - 2018 to Present
- Fits Harley-Davidson Softail Models - 1984 to 2017
- Fits Harley-Davidson Touring Models
- Fits Harley-Davidson Dyna Models - 1991 to 2017
- Fits Harley-Davidson Sportster Models
- Fits Harley-Davidson FXR Models - 1982 to 1994
- Fits Harley-Davidson Trike Models - 2009 to Present
Not sure it fits your bike? Call 715-235-3659 or chat with us on the site and a tech can confirm it with you.
Specifications & Installation
| Brand | Star Tron |
|---|---|
| Part number | 107239 |
| Product type | Fuel Treatment |
| Container Size | 473 ml / 16 US fl oz |
| Type | Enzyme Fuel Additive |
| Packaging | 12 per case (sold individually) |
| Units | Each |
| Weight | 1.01 lbs |
| Dimensions (L x W x H) | 8.85" x 5.03" x 3.62" |
Videos
Want it installed right? Book the Nowaskey Speed Shop or call 715-235-3659.
Questions Riders Ask
Will this fit my bike?
This part is listed for:
- Fits Harley-Davidson Softail Models - 2018 to Present
- Fits Harley-Davidson Softail Models - 1984 to 2017
- Fits Harley-Davidson Touring Models
- Fits Harley-Davidson Dyna Models - 1991 to 2017
See the Fitment tab for the full list.
Save your bike with Shop by Bike and we check it for you. Not sure? Call or chat with us on the site and a tech can confirm it with you.
What's the part number?
Manufacturer part number 3706-0027 (Star Tron). Our item number is 107239.
Can I install it myself?
Most riders with basic tools and a service manual can. The Specifications & Installation tab lists difficulty, time and guides where we have them. Prefer a pro install? Book a Speed Shop slot and call to check current availability.
Who do I talk to after I buy?
Our techs. Call 715-235-3659 or chat with us on the site and you will reach the people who know these parts.
Still have a question? Call 715-235-3659 or chat with us on the site.
Premium Performance Parts
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Track-proven Performance
Nowaskey Extreme Performance is a Harley-Davidson suspension and performance shop in Menomonie, Wisconsin. We design our own shocks, fork cartridges and front-end packages, test them in King of the Baggers racing, and back Nowaskey-brand products with a lifetime warranty.
Every setup is matched to your bike, your weight and the way you ride.