Unleashing the Zeda 85 Firestorm Bicycle Engine Kit – Unmatched Performance!
Jun 25th 2025
Meet the Zeda 85 Firestorm
When it comes to 85cc engine kits, the Zeda 85 Firestorm Edition is the one to watch. Whether you’re a longtime rider or just starting out in the world of motorized bikes, this kit packs the kind of performance, reliability, and raw power that transforms your ride. Let’s break down what makes the Firestorm Zeda 85 the top-tier choice in the bicycle engine world.
Key Features & Specs
Here’s what you can expect when you install the Zeda Firestorm engine kit:
- Bore/Stroke: 52mm bore, 40mm stroke – a true U.S.-measured 85cc displacement
- Max Power: 3.8 HP @ 7700 RPM
- Cylinder: 2-piece with seal coat for long-lasting durability
- Piston: Single-ring design with thicker snap rings for added holding power
- Exhaust: Ultra-quiet 2-piece muffler with an oversized 28mm exhaust port (50mm stud spacing)
- Intake: Large 40mm intake port for increased airflow
- Crankshaft: Long rod (89mm) with 40mm stroke for smoother operation and torque
- Electronics: Performance CDI and magneto with quality Yamaha components
- Mounting Kit: Includes silver grips with black rubber, teardrop gas tank, heavy-duty 415 chain, and more
Fuel/Oil Ratio:
Max Speed: 45mph+ (73km/h) | Max Load: 297 lbs. (135 kg)
Why the Zeda 85 Firestorm is a Game-Changer
If you're serious about upgrading your bicycle engine, the Zeda 85 Firestorm is built to impress. With its 52mm piston and advanced 2-piece cylinder, it’s not just another motorized bike engine – it’s a performance machine. The redesigned flow ports give you strong low-end torque and a consistent power band that pulls all the way to high RPMs.
Toss in the newly developed ultra-quiet muffler, and you’ve got a ride that’s as smooth as it is fast. Plus, the kit includes everything you need to get started – no guessing, no extra trips to the parts store.
How Does It Compare to Other Zeda Engine Kits?
When it comes to choosing the right bicycle engine, comparisons matter. Here's how the Zeda 85 Firestorm stacks up against other top Zeda models:
ZEDA 100 vs ZEDA 85
- Piston: The Firestorm has a larger, 52mm piston, while the ZEDA 100 uses a 50mm. That extra 2mm of volume gives you better torque and acceleration.
- Cylinder Head: The ZEDA 85 features a 2-piece cylinder & head, allowing better airflow and cooler operation, while the ZEDA 100 uses a standard single piece. A 2 piece also allows you to swap out the head if you want to upgrade.
- Ports: The Firestorm’s racing-inspired port design gives it superior flow. The ZEDA 100 is solid but not built with racing in mind.
ZEDA 100 MAX vs ZEDA 85
- Cylinder Head: Both use 2-piece heads, but only the ZEDA 85 has the larger piston (52mm) and performance-designed ports.
- Performance: The ZEDA 100 MAX delivers strong power, but the Firestorm’s optimized airflow gives it an edge in race-style performance – especially when paired with a high-performance carb and CDI.
Phantom 85 vs ZEDA 85
- Piston: Both are true 85cc engines with a 52mm piston. The Phantom utilizes a reed valve with a windowed, double ring piston. The Zeda 85 uses a solid piston with a single ring.
- Cylinder Head: The Phantom 85 uses a 1-piece head while the Zeda Firestorm 85 has a 2-piece. Easily upgrade your Firestorm head to a performance racing CNC head.
- Ports: Slightly different ports are designed to optimize for the piston type. The Zeda 85 has an advantage in some cases because it eliminates the reed valve and uses ports tuned for the single ring piston delivering improved cooling, higher RPMs, and better overall power.
Why Choose the Zeda 85 Firestorm Engine Kit?
This isn’t just a motor upgrade – it’s a whole new riding experience. The Zeda 85 Firestorm engine kit delivers affordable high-end performance you can feel the moment you twist the throttle. Whether you're chasing higher speeds or better low-end pull, this kit nails it with:
- A true 85cc displacement (not a rounded-up figure)
- Durable, performance-built components
- A design inspired by racers and refined for everyday riders
And the best part? It’s backed by Zeda’s reputation for quality and comes with support from a knowledgeable team that rides what they sell.
Ready to Ride?
The Zeda 85 Firestorm Bicycle Engine Kit is built for riders who want more. More power. More speed. More reliability. With all the accessories you need to get rolling and unmatched performance in its class, this is the bicycle engine kit you’ve been waiting for.
Got questions? Our live chat and customer support crew are ready to help every step of the way. Let’s get you on the road.