ZTMoto Phantom 85 v4 PRO engine kit

Introducing the ZTMOTO Phantom 85 cc engine kit, version 4.0. The first motorised bicycle kit with a genuine 85 cc displacement. We are the sole official importer of this model in the Czech Republic. It is primarily sold in the USA, where the engine was originally developed. After two years of development, the engine was launched with the aim of being the most powerful and reliable 2-stroke engine for bicycles.

The Phantom boasts a redesigned one-piece cylinder with a 52 mm bore, combined with a 40 mm stroke, making it the largest, fastest and most powerful motorised bicycle engine you can buy. It comes as standard with an upgraded CDI, the latest performance carburettor, reed valves, a piston with two windows and a completely new range of top-quality exhausts.

Testing has shown that the Phantom's actual power output is over 3 hp.

We also know that motorised bicycle riders demand durability and reliability alongside power. To achieve this, the inner surfaces of the cylinders have been treated with a special ceramic coating. This process, often seen in motorsport, extends cylinder life, reduces friction and heat, and helps improve overall engine performance. This has not been seen on any engine on our market before.

This is the latest version (version 4), with a modified cylinder and piston for even greater reliability.

Version 4.0 offers the following improvements over version 3.0:

- separate CNC cylinder head for better engine cooling

- high-performance PHGB carburettor with a foam filter for even better performance

- CNC carburettor flange

- new throttle grip design

Key benefits of this engine:

• 52 mm bore, 40 mm stroke – actual engine displacement of 85 cc
• One-piece cylinder and head (lower operating temperatures, better performance across the rev range, higher maximum rider weight)
• Upgraded performance carburettor
• Reed valves (control the flow of the air/fuel mixture to increase power)
• Cylinder with an internal ceramic coating (significantly extends cylinder life, reduces friction, lowers operating temperatures and increases power)
• Brand-new ultra-quiet exhaust pipe
• Enlarged cylinder exhaust port
• High-performance CDI with Yamaha components
• Powerful magneto
• Premium-quality bolts
• Better-balanced crankshaft
• Improved bearings / crankcase 60 % thicker around the bearings
• Large intake port
• Piston with 2 windows
• Larger 8 mm x 1.25 studs

Kit contents, including accessories:

• Engine - 85 cc, 2-stroke
• Black fuel tank (2l) with a new fuel tank cap, fuel filter, fuel line and fuel tap
• High-performance CDI with Yamaha components
• Type 415 chain (reinforced) with chain guard
• Chain tensioner with ball bearing
• Ultra-quiet exhaust (stainless steel with sound-insulating cotton inside)
• Throttle grip + throttle cable
• Required wiring
• Bicycle frame mounting bracket
• Rear sprocket: 44 teeth
• Spark plug spanner and sprocket puller
• Installation instructions