NOTE: ASSEMBLY REQUIRED. WE CAN ONLY SHIP THIS WITH UPS OR FEDEX GROUND. WE CANNOT SHIP THIS EXPEDITED.

THIS COMES IN 2 PACKAGES. IN MOST CASES, THE ENGINE KIT WILL BE DELIVERED FIRST, THEN THE BICYCLE THE NEXT DAY OR TWO.

Knight Racer 8G

Limited edition kit features a 49cc HuaSheng motor with Clutch Flyweight for 5/8 Tapered Shaft. Using a belt drive single speed transmission for smooth acceleration. This kit includes a 2 piece wide crank kit, if the bike has a 1 piece crankset a conversion bottom bracket will need to be used (not included).

4 Stroke engine kits are very different from 2 stroke kits in many ways. Building a 4 stroke bike is a little more involved then the two strokes, the extra effort is worth it. Pull start engine, not push start like the 2 strokes. Overall this type of engine is more reliable with more power and torque. With some of the larger cc motors, the top speeds far exceed the 2 strokes. Since these motors are larger in cc they are also larger in size and weight. Almost all bicycles will need to use a wider crank setup to clear the motor, the stock arms and pedals will hit the motor when pedaled as a regular bike. One piece cranks will also require a bottom bracket conversion set as well (not included).

This style of the engine might need slight modification to the bikes and will not fit all frames.

Advantages of 4 Stroke Bicycle engine kits:

• Use straight gas (no mixing oil with gas)
• More Horsepower
• More Torque
• Quieter Engine

This Motorized Bicycle Kit Includes:

• • 26" Men's Hyper Cruiser
  • HuaSheng 49cc with Centrifugal Clutch Engine (4-Stroke)
  • 100T Freewheel Belt Transmission for Tapered Shaft
  • 2.5 L Gas Tank
  • Gasoline Tank Switch (AL)
  • Fuel Line #2
  • Fuel Filter
  • Improved Wide Pedal Crank
  • 44 Tooth Sprocket
  • Pineapple Bushing
  • Accelerograph Throttle Handle
  • Throttle Cable 50"
  • Mounting Plate
  • 415 Heavy Duty Chain
  • Idler Pulley Chain Tensioner
  • Chain Guard
  
  
  MOTOR SPECS: 
  
  
  • No load RPM: 8500 Cooling: Forced Air
  • Displacement bore & stroke: 41.8 x 35.8
  • Power: 1.2KW @6800 rpm
  • Torque: 2.0Nm @4500 rpm
  • Engine net weight: 5.2 kg
  • Length x width x height: 247 mm x 225 mm x 335 mm
  • PTO shaft rotation: CCW centrifugal clutch
  • Crankcase oil change: 50 hours after change, first at 10 hours operation
  • Rear mount engine has closed loop fuel system. V-Frame mount does not

* Orders received Monday - Friday by 3:00 PM EST are eligible for
Same Day Shipping! Except for USPS which ships the next business day.

Our gasoline operated products are NOT compliant with Environmental Protection Agency ( E.P.A. ) or California Air Resources Board (C.A.R.B) for the use on/off Public roads. Upon purchase, the buyer agrees to use products for racing (closed-course competition) only and NOT for on/off public roads.

If you need help with installation or troubleshooting, kindly use our Builder Locator to find builders near you. Builders are experts with motorized bicycles.

Knight Racer Manual